US20050133984A1 - Automatic document feeder - Google Patents
Automatic document feeder Download PDFInfo
- Publication number
- US20050133984A1 US20050133984A1 US10/942,793 US94279304A US2005133984A1 US 20050133984 A1 US20050133984 A1 US 20050133984A1 US 94279304 A US94279304 A US 94279304A US 2005133984 A1 US2005133984 A1 US 2005133984A1
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- Prior art keywords
- paper feeding
- sloping
- feeding tray
- document feeder
- automatic document
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H1/00—Supports or magazines for piles from which articles are to be separated
- B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
- B65H1/12—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising spring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0661—Rollers or like rotary separators for separating inclined-stacked articles with separator rollers above the stack
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2401/00—Materials used for the handling apparatus or parts thereof; Properties thereof
- B65H2401/10—Materials
- B65H2401/11—Polymer compositions
- B65H2401/114—Polyester, e.g. polyethylene terephthalate [PET]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2405/00—Parts for holding the handled material
- B65H2405/10—Cassettes, holders, bins, decks, trays, supports or magazines for sheets stacked substantially horizontally
- B65H2405/11—Parts and details thereof
- B65H2405/111—Bottom
- B65H2405/1116—Bottom with means for changing geometry
- B65H2405/11162—Front portion pivotable around an axis perpendicular to transport direction
Definitions
- the invention relates in general to an automatic document feeder (ADF), and more particularly to an automatic document feeder which disposes a bearing board on an elastic structure of a sloping paper feeding tray.
- ADF automatic document feeder
- an automatic document feeder 100 which includes a horizontal paper feeding tray 104 , an automatic paper feeding roller set 106 , a paper supporting plate 108 and a spring 111 , for feeding a to-be-fed paper sheet 102 into an office machine (not shown in FIG. 1A ) such as a printer, a copier, a scanner or a facsimile machine is shown.
- the horizontal paper feeding tray 104 is for accommodating the to-be-fed paper sheet 102 .
- a feeding end 112 is formed by a flange of the automatic paper feeding roller set 106 and a paper feeding pad 110 , wherein the flange of the automatic paper feeding roller set 106 and the paper feeding pad 110 are adjacent to and in contact with each other.
- the automatic paper feeding roller set 106 rotates clockwise around the roller shaft 116 and carries the to-be-fed paper sheet 102 to move forward.
- the paper supporting plate 108 with its one end being pivotally connected to the horizontal paper feeding tray 104 , is able to turn around on the horizontal paper feeding tray 104 .
- One end of the spring 111 is fixed at a slot 113 of the horizontal paper feeding tray 104 while the other end of the spring 111 is fixed onto the bottom of the other end of the paper supporting plate 108 , forming an included angle ⁇ 1 between the paper supporting plate 108 and the horizontal paper feeding tray 104 .
- FIG. 1B a cross-sectional view of the structure of the automatic document feeder of FIG. 1A with a paper stack 114 being loaded therein is shown.
- the paper stack 114 is placed on the horizontal paper feeding tray 104 , wherein the paper stack 114 includes a paper sheet 102 a , a paper sheet 102 b , a paper stack 114 a and a paper sheet 102 c according to a top-down arrangement. Since the gravity of the paper stack 114 is much larger than that of the single to-be-fed paper sheet 102 in FIG. 1A , the included angle between the paper supporting plate 108 and the horizontal paper feeding tray 104 in FIG. 1B is smaller than the included angle ⁇ 1 in FIG.
- the spring 111 since the paper stack 114 weighs heavier, the spring 111 must have a larger elasticity so that the front end of the paper stack 114 may be raised up to the paper feeding pad 110 with the front end of the paper sheet 102 a just reaching the feeding end 112 .
- the automatic paper feeding roller set 106 After the automatic paper feeding roller set 106 has fed the paper sheets 102 a and 102 b and the paper stack 114 a into the office machine in succession, only the paper sheet 102 c will be left in the horizontal paper feeding tray 104 like the case in FIG. 1A .
- the included angle between the paper supporting plate 108 and the horizontal paper feeding tray 104 is expanded to be ⁇ 1 , so that the paper sheet 102 c is raised up with the front end of the paper sheet 102 c reaching the feeding end 112 . Consequently, the automatic paper feeding roller set 106 may carry the paper sheet 102 c towards the feeding end 112 .
- the step of automatic document feeding of the automatic document feeder 100 is completed here.
- the spring 111 Since the structure of the horizontal paper feeding tray 104 adopts a horizontal design, the spring 111 must provide an upward elasticity to support the weight of the paper sheets and to enable the paper supporting plate 108 to raise the paper sheets up so that the front ends of the paper sheets may reach the feeding end 112 . When the number of paper sheets placed on the paper supporting plate 108 becomes larger, the elasticity of the spring 111 needs to be enhanced accordingly to assure that the topmost paper sheet may reach the feeding end 112 . Since the assembly mechanism of the horizontal paper feeding tray 104 , the spring 111 and the paper supporting plate 108 is very complicated, the assembly is costly and is difficult to be done during the manufacturing process.
- an automatic document feeder 200 which includes a sloping paper feeding tray 204 , a automatic paper feeding roller set 206 and a Mylar 208 , is for feeding a to-be-fed paper sheet 202 into an office machine (not shown in FIG. 2A ) such as a printer, a copier, a scanner or a facsimile machine is shown.
- the sloping paper feeding tray 204 is for accommodating the to-be-fed paper sheet 202 .
- Both the automatic paper feeding roller set 206 and the paper feeding pad 210 are disposed at the bottom of the sloping paper feeding tray 204 .
- a feeding end 212 is formed by a flange of the automatic paper feeding roller set 206 and the paper feeding pad 210 , wherein the flange of the automatic paper feeding roller set 206 and the paper feeding pad 210 are adjacent to and in contact with each other.
- the automatic paper feeding roller set 206 rotates clockwise around a roller shaft 216 and carries the to-be-fed paper sheet 202 to move forward.
- the Mylar 208 further includes a junction portion 208 a and a supporting portion 208 b , wherein the junction portion 208 a is flatly adhered onto the sloping paper feeding tray 204 while an included angle ⁇ 1 is formed between the supporting portion 208 b and the sloping paper feeding tray 204 .
- the included angle between the supporting portion 208 b and the sloping paper feeding tray 204 becomes smaller.
- the Mylar 208 is able to support the to-be-fed paper sheet 202 .
- the front end of the to-be-fed paper sheet 202 may slide to reach the feeding end 212 due to gravity, so that the automatic paper feeding roller set 206 may carry the to-be-fed paper sheet 202 to move towards the feeding end 212 .
- FIG. 2B a cross-sectional view of the structure of an automatic document feeder 200 in FIG. 2A with a paper stack 214 being loaded therein is shown.
- the paper stack 214 including two paper sheets 202 a and 202 b , a paper stack 214 a and a paper sheet 202 c arranged in a top-down order is loaded in a sloping paper feeding tray 204 . Since the downward gravity of the paper stack 214 is larger than the gravity of the single to-be-fed paper sheet 202 in FIG. 2A and the upward elasticity of the Mylar 208 as well, the included angle between the supporting plate 208 b and the sloping paper feeding tray 204 is smaller than ⁇ 1 .
- the bottom of the supporting portion 208 b of the Mylar 208 may come into contact with the sloping paper feeding tray 204 .
- the front end of the paper stack 214 comes into contact with the paper feeding pad 210 with the front end of the paper sheet 202 a just reaching the feeding end 212 .
- the paper feeding roller set 206 After the paper sheets 202 a and 202 b and the paper stack 214 a are sequentially carried by the paper feeding roller set 206 and fed into the office machine, only the paper sheet 202 c will be left on the sloping paper feeding tray 204 like the case in FIG. 2A . Owing to the upward elasticity of the Mylar 208 , the included angle between the supporting portion 208 b and the sloping paper feeding tray 204 is expanded and becomes ⁇ 1 so that the paper sheet 202 c is raised upward with the front end of the paper sheet 202 c reaching the feeding end 212 . Consequently, the automatic paper feeding roller set 206 may carry the paper sheet 202 c to move towards the feeding end 212 . The step of automatic document feeding of the automatic document feeder 200 is completed here.
- the Mylar 208 which has a fragile structure and is directly exposed on the sloping paper feeding tray 204 , will be easily worn out in the long run and is likely to be damaged by a careless operator. Once the Mylar 208 is damaged, the automatic document feeder 200 cannot function properly and needs to be repaired, boosting the repair and maintenance cost even higher.
- an automatic document feeder including a sloping paper feeding tray, a bearing board and an elastic structure.
- the sloping paper feeding tray is for accommodating a to-be-fed paper sheet.
- the bearing board with its one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, while the other end of the bearing board supports the to-be-fed paper sheet.
- the elastic structure which is disposed between the sloping paper feeding tray and the bearing board, elastically supports the other end of the bearing board to create an included angle between the supporting plate and the sloping paper feeding tray.
- the elastic structure may be a Mylar or a spring for instance.
- an automatic document feeder including a sloping paper feeding tray, a bearing board and a Mylar.
- the sloping paper feeding tray is for accommodating a to-be-fed paper sheet.
- the bearing board with its one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, while the other end of the bearing board supports the to-be-fed paper sheet.
- the Mylar which is disposed between the sloping paper feeding tray and the supporting plate, may elastically spring the other end of the bearing board so that an included angle is created between the bearing board and the sloping paper feeding tray.
- the Mylar includes a junction portion and a supporting portion with the junction portion being flatly adhered onto the sloping paper feeding tray.
- the supporting portion which creates another included angle with the sloping paper feeding tray, elastically supports the bearing board.
- FIG. 1A shows a cross-sectional view of the structure of a conventional automatic document feeder
- FIG. 1B shows a cross-sectional view of the structure of the automatic document feeder of FIG. 1A with a paper stack being loaded therein;
- FIG. 2A shows a cross-sectional view of the structure of an automatic document feeder 200 disclosed in Taiwanese patent publication number 509143;
- FIG. 2B shows a cross-sectional view of the structure of an automatic document feeder 200 in FIG. 2A with a paper stack 214 being loaded therein;
- FIG. 3A shows a cross-sectional view of the structure of an automatic document feeder according to preferred embodiment one of the invention
- FIG. 3B shows a cross-sectional view of the structure of the automatic document feeder of FIG. 3A with a paper stack being loaded therein;
- FIG. 4A shows a cross-sectional view of the structure of an automatic document feeder according to preferred embodiment two of the invention.
- FIG. 4B shows a cross-sectional view of the structure of the automatic document feeder of FIG. 4A with a paper stack being loaded therein.
- the automatic document feeder 300 includes a sloping paper feeding tray 304 , an automatic paper feeding roller set 306 , a paper feeding pad 310 , a bearing board 307 and an elastic structure, wherein the elastic structure may be a spring or a Mylar 308 .
- the automatic document feeder 300 is for feeding a to-be-fed paper sheet 302 into an office machine (not shown in FIG. 3A ) such as a printer, a copier, a scanner or a facsimile machine.
- the sloping paper feeding tray 304 is for accommodating the to-be-fed paper sheet 302 .
- Both the automatic paper feeding roller set 306 and the paper feeding pad 310 are disposed at the bottom of the sloping paper feeding tray 304 .
- a feeding end 312 is formed by a flange of the automatic paper feeding roller set 306 and the paper feeding pad 310 , wherein the flange of the automatic paper feeding roller set 306 and the paper feeding pad 310 are adjacent to and in contact with each other.
- the automatic paper feeding roller set 306 rotates clockwise around a roller shaft 316 and carries the to-be-fed paper sheet 302 to move forward.
- the bearing board 307 with its one end being pivotally connected to the sloping paper feeding tray 304 , is able to turn around on the sloping paper feeding tray, while the other end of the bearing board 307 supports the to-be-fed paper sheet 302 .
- the Mylar 308 which is disposed between the sloping paper feeding tray 304 and the bearing board 307 , may elastically spring the other end of the bearing board 307 so that an included angle ⁇ 1 is created between the bearing board and the sloping paper feeding tray.
- the Mylar 308 includes a junction portion 308 a and a supporting portion 308 b with the junction portion 308 a being flatly adhered onto the sloping paper feeding tray 304 .
- the supporting portion 308 b which creates another included angle with the sloping paper feeding tray 304 , elastically supports the bearing board 307 . As more and more paper sheets are placed on the bearing board 307 , the included angle between the bearing board 307 and the sloping paper feeding tray 304 becomes smaller and so does the included angle between the supporting portion 308 b and the sloping paper feeding tray 304 .
- the bearing board 307 uses the elasticity of the Mylar 308 to support the to-be-fed paper sheet 302 with the front end of the to-be-fed paper 302 reaching the feeding end 312 , so that the automatic paper feeding roller set 306 may carry the to-be-fed paper sheet 302 to move towards the feeding end 312 .
- FIG. 3B a cross-sectional view of the structure of the automatic document feeder of FIG. 3A with a paper stack being loaded therein is shown.
- the paper stack 314 including a paper sheet 302 a , a paper sheet 302 b , a paper stack 314 a and a paper sheet 302 c arranged in a top-down order is loaded in a sloping paper feeding tray 304 . Since the downward gravity of the paper stack 314 is larger than the gravity of the single to-be-fed paper sheet 302 in FIG. 3A and the upward elasticity of the Mylar 308 as well, the included angle between the bearing board 307 and the sloping paper feeding tray 304 is smaller than ⁇ 1 .
- the bottom of the supporting portion 308 b of the Mylar 308 may even come into contact with the sloping paper feeding tray 304 . Meanwhile, the front end of the paper stack 314 comes into contact with the paper feeding pad 310 and the front end of the paper sheet 302 a just reaches the feeding end 312 .
- the automatic paper feeding roller set 306 When the automatic paper feeding roller set 306 starts to rotate around a roller shaft 316 , the automatic paper feeding roller set 306 will carry the paper sheet 302 a to move towards the feeding end 312 because the front end of the paper sheet 302 a has reached the feeding end 312 already. After the paper sheet 302 a has completely passed through the feeding end 312 and is carried forward by the automatic paper feeding roller set 306 , the upward elasticity of the Mylar 308 will bring the front end of the paper sheet 302 b to reach the feeding end 312 to be carried forward by the automatic paper feeding roller set 306 like the case mentioned above. When fewer and fewer paper sheets are left at the paper stack 314 , the downward gravity of the paper stack 314 becomes smaller and smaller accordingly.
- the included angle between the bearing board 307 and the sloping paper feeding tray 304 will become larger and larger to support the weight of the remaining paper sheets of the paper stack 314 . Consequently, the front end of the remaining paper sheets of the paper stack 314 will reach the feeding end 312 sequentially, so that the automatic paper feeding roller set 306 may sequentially carry the paper sheets of the paper stack 314 to move forward.
- the paper feeding roller set 306 After the paper sheets 302 a and 302 b and the paper stack 314 a are sequentially carried by the paper feeding roller set 306 and fed into the office machine, only the paper sheet 302 c will be left at the sloping paper feeding tray 204 like the case in FIG. 3A . Owing to the upward elasticity of the Mylar 308 , the included angle between the bearing board 307 and the sloping paper feeding tray 304 is expanded and becomes ⁇ 1 so that the paper sheet 302 c is pushed upward with the front end of the paper sheet 302 c reaching the feeding end 312 . Consequently, the automatic paper feeding roller set 306 may carry the paper sheet 302 c to move towards the feeding end 312 . The step of automatic document feeding of the automatic document feeder 300 is completed here.
- the automatic document feeder 400 includes a sloping paper feeding tray 404 , an automatic paper feeding roller set 406 , a paper feeding pad 410 , a bearing board 407 and an elastic structure, wherein the elastic structure may be a spring or a Mylar 408 .
- the automatic document feeder 400 is for feeding a to-be-fed paper sheet 402 into an office machine (not shown in FIG. 4A ) such as a printer, a copier, a scanner or a facsimile machine.
- the sloping paper feeding tray 404 is for accommodating the to-be-fed paper sheet 402 .
- Both the automatic paper feeding roller set 406 and the paper feeding pad 410 are disposed at the bottom of the sloping paper feeding tray 404 .
- a feeding end 412 is formed by a flange of the automatic paper feeding roller set 406 and the paper feeding pad 410 , wherein the flange of the automatic paper feeding roller set 406 and the paper feeding pad 410 are adjacent to and in contact with each other.
- the automatic paper feeding roller set 406 rotates clockwise around a roller shaft 416 and carries the to-be-fed paper sheet 402 to move forward.
- the bearing board 407 with its one end being pivotally connected to the sloping paper feeding tray 404 , is able to turn around on the sloping paper feeding tray, while the other end of the bearing board 407 supports the to-be-fed paper sheet 402 .
- the Mylar 408 which is disposed between the sloping paper feeding tray 404 and the bearing board 407 , may elastically spring the other end of the bearing board 407 so that an included angle ⁇ 1 is created between the bearing board 407 and the sloping paper feeding tray 404 .
- the Mylar 408 includes a junction portion 408 a , a supporting portion 408 b and a bending portion 408 c , wherein the supporting portion 408 b connects the junction portion 408 a and the bending portion 408 c with the junction portion 408 a being flatly adhered onto the sloping paper feeding tray 404 .
- the supporting portion 408 b which creates another included angle with the sloping paper feeding tray 404 , elastically supports the bearing board 407 .
- the bending portion 408 c forms an included angle with the supporting portion 408 c , wherein the included angle may be a fixed included angle or an adjustable included angle.
- one terminal end of the bending portion 408 c is embedded into a slot 413 of the sloping paper feeding tray 404 .
- the included angle between the bearing board 407 and the sloping paper feeding tray 404 becomes smaller while the bending portion 408 c slide inwardly along the slot 413 .
- the bearing board 407 uses the elasticity of the Mylar 408 to support the to-be-fed paper sheet 402 with the front end of to-be-fed paper 402 reaching the feeding end 412 , so that the automatic paper feeding roller set 406 may carry the to-be-fed paper sheet 402 to move towards the feeding end 412 .
- FIG. 4B a cross-sectional view of the structure of the automatic document feeder 400 of FIG. 4A with a paper stack being loaded therein is shown.
- the paper stack 414 including a paper sheet 402 a , a paper sheet 402 b , a paper stack 414 a and a paper sheet 402 c arranged in a top-down order is loaded in a sloping paper feeding tray 404 . Since the downward gravity of the paper stack 414 is larger than the gravity of the single to-be-fed paper sheet 402 in FIG.
- the included angle between the bearing board 407 and the sloping paper feeding tray 404 is smaller than ⁇ 1 while the bending portion 408 c slides inwardly along the slot 413 . Consequently, the bottom of the supporting portion 408 b of the Mylar 408 may even come into contact with the sloping paper feeding tray 404 , while the bending portion 408 c may be completely embedded into the slot 413 with the bottom of the bearing board 407 touching one end of the junction portion 408 a . Meanwhile, the front end of the paper stack 414 reaches the paper feeding pad 410 and the front end of the paper sheet 402 a just reaches the feeding end 412 .
- the automatic paper feeding roller set 406 After the automatic paper feeding roller set 406 has sequentially carried the paper sheet 402 a , the paper sheet 402 b and the paper stack 414 a to move forward and to be fed into the office machine, only the paper sheet 402 c will be left at the sloping paper feeding tray 404 like the case in FIG. 4A . Owing to the upward elasticity of the Mylar 408 , the included angle between the bearing board 407 and the sloping paper feeding tray 404 will be expanded and become ⁇ 1 , while the bending portion 407 c will slide outwardly along the slot 413 to push the paper sheet 402 c upward with the front end of the paper sheet 402 c reaching the feeding end 412 . Consequently, the automatic paper feeding roller set 406 may carry the paper sheet 402 c to move towards the feeding end 412 . The step of automatic document feeding of the automatic document feeder 400 is completed here.
- the technique of the invention is not limited thereto.
- the paper sheet after a paper sheet is loaded into the sloping paper feeding tray, the paper sheet will be disposed on the bearing board with a slope so that the front end of the paper sheet will automatically slide to the feeding end. Therefore, the upward elasticity of the elastic structure of the invention does not need to be as large as that in FIG. 1A . A smaller upward elasticity will do as long as the elasticity suffices to enable the front end of the paper sheet to reach the feeding end after the paper sheet slides into the sloping paper feeding tray due to gravity.
- the automatic document feeder disclosed above not only protects the Mylar disposed under the bearing board from being damaged but also reduces the damage rate of the Mylar, so that the lifespan of the Mylar may be lengthened and a stable operation of the automatic document feeder may be achieved.
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Abstract
An automatic document feeder including a sloping paper feeding tray, a bearing board and a Mylar is provided. The sloping paper feeding tray is used for accommodating a paper sheet. The bearing board, with its one end being pivotally connected to the sloping paper feeding tray, turns around on the sloping paper feeding tray, while the other end of the bearing board supports the paper sheet. The Mylar, which is disposed between the sloping paper feeding tray and the supporting plate, elastically supports the other end of the bearing board so that an included angle is created between the bearing board and the sloping paper feeding tray. The Mylar includes a junction portion and a supporting portion with the junction portion being flatly adhered onto the sloping paper feeding tray. The supporting portion, which creates another included angle with the sloping paper feeding tray, elastically supports the bearing board.
Description
- This application claims the benefit of Taiwan application Serial No. 92132644, filed Nov. 20, 2003, the subject matter of which is incorporated herein by reference.
- 1. Field of the Invention
- The invention relates in general to an automatic document feeder (ADF), and more particularly to an automatic document feeder which disposes a bearing board on an elastic structure of a sloping paper feeding tray.
- 2. Description of the Related Art
- Referring to
FIG. 1A , a cross-sectional view of the structure of a conventional automatic document feeder (ADF) is shown. InFIG. 1A , anautomatic document feeder 100, which includes a horizontalpaper feeding tray 104, an automatic paperfeeding roller set 106, apaper supporting plate 108 and aspring 111, for feeding a to-be-fed paper sheet 102 into an office machine (not shown inFIG. 1A ) such as a printer, a copier, a scanner or a facsimile machine is shown. The horizontalpaper feeding tray 104 is for accommodating the to-be-fed paper sheet 102. Afeeding end 112 is formed by a flange of the automatic paper feeding roller set 106 and apaper feeding pad 110, wherein the flange of the automatic paper feeding roller set 106 and thepaper feeding pad 110 are adjacent to and in contact with each other. The automatic paper feeding roller set 106 rotates clockwise around theroller shaft 116 and carries the to-be-fed paper sheet 102 to move forward. Thepaper supporting plate 108, with its one end being pivotally connected to the horizontalpaper feeding tray 104, is able to turn around on the horizontalpaper feeding tray 104. One end of thespring 111 is fixed at aslot 113 of the horizontalpaper feeding tray 104 while the other end of thespring 111 is fixed onto the bottom of the other end of thepaper supporting plate 108, forming an included angle θ1 between thepaper supporting plate 108 and the horizontalpaper feeding tray 104. - Referring to
FIG. 1B , a cross-sectional view of the structure of the automatic document feeder ofFIG. 1A with apaper stack 114 being loaded therein is shown. InFIG. 1B , thepaper stack 114 is placed on the horizontalpaper feeding tray 104, wherein thepaper stack 114 includes apaper sheet 102 a, apaper sheet 102 b, apaper stack 114 a and apaper sheet 102 c according to a top-down arrangement. Since the gravity of thepaper stack 114 is much larger than that of the single to-be-fed paper sheet 102 inFIG. 1A , the included angle between thepaper supporting plate 108 and the horizontalpaper feeding tray 104 inFIG. 1B is smaller than the included angle θ1 inFIG. 1A . Furthermore, since thepaper stack 114 weighs heavier, thespring 111 must have a larger elasticity so that the front end of thepaper stack 114 may be raised up to thepaper feeding pad 110 with the front end of thepaper sheet 102 a just reaching thefeeding end 112. - After the automatic paper
feeding roller set 106 has fed thepaper sheets paper stack 114 a into the office machine in succession, only thepaper sheet 102 c will be left in the horizontalpaper feeding tray 104 like the case inFIG. 1A . By means of the upward elasticity of thespring 111, the included angle between thepaper supporting plate 108 and the horizontalpaper feeding tray 104 is expanded to be θ1, so that thepaper sheet 102 c is raised up with the front end of thepaper sheet 102 c reaching thefeeding end 112. Consequently, the automatic paperfeeding roller set 106 may carry thepaper sheet 102 c towards thefeeding end 112. The step of automatic document feeding of theautomatic document feeder 100 is completed here. - Since the structure of the horizontal
paper feeding tray 104 adopts a horizontal design, thespring 111 must provide an upward elasticity to support the weight of the paper sheets and to enable thepaper supporting plate 108 to raise the paper sheets up so that the front ends of the paper sheets may reach thefeeding end 112. When the number of paper sheets placed on thepaper supporting plate 108 becomes larger, the elasticity of thespring 111 needs to be enhanced accordingly to assure that the topmost paper sheet may reach thefeeding end 112. Since the assembly mechanism of the horizontalpaper feeding tray 104, thespring 111 and thepaper supporting plate 108 is very complicated, the assembly is costly and is difficult to be done during the manufacturing process. - Referring to
FIG. 2A , a cross-sectional view of the structure of anautomatic document feeder 200 disclosed in Taiwanese patent publication number 509143 is shown. InFIG. 2A , anautomatic document feeder 200, which includes a slopingpaper feeding tray 204, a automatic paperfeeding roller set 206 and a Mylar 208, is for feeding a to-be-fed paper sheet 202 into an office machine (not shown inFIG. 2A ) such as a printer, a copier, a scanner or a facsimile machine is shown. The slopingpaper feeding tray 204 is for accommodating the to-be-fed paper sheet 202. Both the automatic paperfeeding roller set 206 and thepaper feeding pad 210 are disposed at the bottom of the slopingpaper feeding tray 204. Afeeding end 212 is formed by a flange of the automatic paperfeeding roller set 206 and thepaper feeding pad 210, wherein the flange of the automatic paperfeeding roller set 206 and thepaper feeding pad 210 are adjacent to and in contact with each other. Moreover, the automatic paper feeding roller set 206 rotates clockwise around aroller shaft 216 and carries the to-be-fed paper sheet 202 to move forward. The Mylar 208 further includes ajunction portion 208 a and a supportingportion 208 b, wherein thejunction portion 208 a is flatly adhered onto the slopingpaper feeding tray 204 while an included angle β1 is formed between the supportingportion 208 b and the slopingpaper feeding tray 204. As more paper sheets are placed on the Mylar 208, the included angle between the supportingportion 208 b and the slopingpaper feeding tray 204 becomes smaller. By means of the structural elasticity, the Mylar 208 is able to support the to-be-fed paper sheet 202. Availed by the sloping design of the structure of the slopingpaper feeding tray 204, the front end of the to-be-fed paper sheet 202 may slide to reach thefeeding end 212 due to gravity, so that the automatic paperfeeding roller set 206 may carry the to-be-fedpaper sheet 202 to move towards thefeeding end 212. - Referring to
FIG. 2B , a cross-sectional view of the structure of anautomatic document feeder 200 inFIG. 2A with apaper stack 214 being loaded therein is shown. InFIG. 2B , thepaper stack 214 including twopaper sheets paper stack 214 a and apaper sheet 202 c arranged in a top-down order is loaded in a slopingpaper feeding tray 204. Since the downward gravity of thepaper stack 214 is larger than the gravity of the single to-be-fed paper sheet 202 inFIG. 2A and the upward elasticity of the Mylar 208 as well, the included angle between the supportingplate 208 b and the slopingpaper feeding tray 204 is smaller than β1. Furthermore, the bottom of the supportingportion 208 b of the Mylar 208 may come into contact with the slopingpaper feeding tray 204. Meanwhile, the front end of thepaper stack 214 comes into contact with thepaper feeding pad 210 with the front end of thepaper sheet 202 a just reaching thefeeding end 212. - After the
paper sheets paper stack 214 a are sequentially carried by the paper feeding roller set 206 and fed into the office machine, only thepaper sheet 202 c will be left on the slopingpaper feeding tray 204 like the case inFIG. 2A . Owing to the upward elasticity of the Mylar 208, the included angle between the supportingportion 208 b and the slopingpaper feeding tray 204 is expanded and becomes β1 so that thepaper sheet 202 c is raised upward with the front end of thepaper sheet 202 c reaching thefeeding end 212. Consequently, the automatic paperfeeding roller set 206 may carry thepaper sheet 202 c to move towards thefeeding end 212. The step of automatic document feeding of theautomatic document feeder 200 is completed here. - However, the Mylar 208, which has a fragile structure and is directly exposed on the sloping
paper feeding tray 204, will be easily worn out in the long run and is likely to be damaged by a careless operator. Once the Mylar 208 is damaged, theautomatic document feeder 200 cannot function properly and needs to be repaired, boosting the repair and maintenance cost even higher. - It is therefore an object of the invention to provide an automatic document feeder whose design of disposing a bearing board on a sloping paper feeding tray not only protects the Mylar disposed under the supporting plate from being damaged but also reduces the damage rate of the Mylar, so that the lifespan of the Mylar may be lengthened and a stable operation of the automatic document feeder may be achieved
- It is therefore another object of the invention to provide an automatic document feeder including a sloping paper feeding tray, a bearing board and an elastic structure. The sloping paper feeding tray is for accommodating a to-be-fed paper sheet. The bearing board, with its one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, while the other end of the bearing board supports the to-be-fed paper sheet. The elastic structure, which is disposed between the sloping paper feeding tray and the bearing board, elastically supports the other end of the bearing board to create an included angle between the supporting plate and the sloping paper feeding tray. The elastic structure may be a Mylar or a spring for instance.
- It is therefore another object of the invention to provide an automatic document feeder including a sloping paper feeding tray, a bearing board and a Mylar. The sloping paper feeding tray is for accommodating a to-be-fed paper sheet. The bearing board, with its one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, while the other end of the bearing board supports the to-be-fed paper sheet. The Mylar, which is disposed between the sloping paper feeding tray and the supporting plate, may elastically spring the other end of the bearing board so that an included angle is created between the bearing board and the sloping paper feeding tray. The Mylar includes a junction portion and a supporting portion with the junction portion being flatly adhered onto the sloping paper feeding tray. The supporting portion, which creates another included angle with the sloping paper feeding tray, elastically supports the bearing board.
- Other objects, features, and advantages of the invention will become apparent from the following detailed description of the preferred but non-limiting embodiments. The following description is made with reference to the accompanying drawings.
-
FIG. 1A shows a cross-sectional view of the structure of a conventional automatic document feeder; -
FIG. 1B shows a cross-sectional view of the structure of the automatic document feeder ofFIG. 1A with a paper stack being loaded therein; -
FIG. 2A shows a cross-sectional view of the structure of anautomatic document feeder 200 disclosed in Taiwanese patent publication number 509143; -
FIG. 2B shows a cross-sectional view of the structure of anautomatic document feeder 200 inFIG. 2A with apaper stack 214 being loaded therein; -
FIG. 3A shows a cross-sectional view of the structure of an automatic document feeder according to preferred embodiment one of the invention; -
FIG. 3B shows a cross-sectional view of the structure of the automatic document feeder ofFIG. 3A with a paper stack being loaded therein; -
FIG. 4A shows a cross-sectional view of the structure of an automatic document feeder according to preferred embodiment two of the invention; and -
FIG. 4B shows a cross-sectional view of the structure of the automatic document feeder ofFIG. 4A with a paper stack being loaded therein. - Referring to
FIG. 3A , a cross-sectional view of the structure of anautomatic document feeder 300 according to preferred embodiment one of the invention is shown. InFIG. 3A , theautomatic document feeder 300 includes a slopingpaper feeding tray 304, an automatic paper feeding roller set 306, apaper feeding pad 310, a bearingboard 307 and an elastic structure, wherein the elastic structure may be a spring or aMylar 308. Theautomatic document feeder 300 is for feeding a to-be-fed paper sheet 302 into an office machine (not shown inFIG. 3A ) such as a printer, a copier, a scanner or a facsimile machine. The slopingpaper feeding tray 304 is for accommodating the to-be-fed paper sheet 302. Both the automatic paper feeding roller set 306 and thepaper feeding pad 310 are disposed at the bottom of the slopingpaper feeding tray 304. A feedingend 312 is formed by a flange of the automatic paper feeding roller set 306 and thepaper feeding pad 310, wherein the flange of the automatic paper feeding roller set 306 and thepaper feeding pad 310 are adjacent to and in contact with each other. Moreover, the automatic paper feeding roller set 306 rotates clockwise around aroller shaft 316 and carries the to-be-fed paper sheet 302 to move forward. - The bearing
board 307, with its one end being pivotally connected to the slopingpaper feeding tray 304, is able to turn around on the sloping paper feeding tray, while the other end of the bearingboard 307 supports the to-be-fed paper sheet 302. TheMylar 308, which is disposed between the slopingpaper feeding tray 304 and the bearingboard 307, may elastically spring the other end of the bearingboard 307 so that an included angle ω1 is created between the bearing board and the sloping paper feeding tray. - The
Mylar 308 includes ajunction portion 308 a and a supportingportion 308 b with thejunction portion 308 a being flatly adhered onto the slopingpaper feeding tray 304. The supportingportion 308 b, which creates another included angle with the slopingpaper feeding tray 304, elastically supports the bearingboard 307. As more and more paper sheets are placed on the bearingboard 307, the included angle between the bearingboard 307 and the slopingpaper feeding tray 304 becomes smaller and so does the included angle between the supportingportion 308 b and the slopingpaper feeding tray 304. The bearingboard 307 uses the elasticity of theMylar 308 to support the to-be-fed paper sheet 302 with the front end of the to-be-fed paper 302 reaching the feedingend 312, so that the automatic paper feeding roller set 306 may carry the to-be-fed paper sheet 302 to move towards the feedingend 312. - Referring to
FIG. 3B , a cross-sectional view of the structure of the automatic document feeder ofFIG. 3A with a paper stack being loaded therein is shown. InFIG. 3B , thepaper stack 314 including apaper sheet 302 a, apaper sheet 302 b, apaper stack 314 a and apaper sheet 302 c arranged in a top-down order is loaded in a slopingpaper feeding tray 304. Since the downward gravity of thepaper stack 314 is larger than the gravity of the single to-be-fed paper sheet 302 inFIG. 3A and the upward elasticity of theMylar 308 as well, the included angle between the bearingboard 307 and the slopingpaper feeding tray 304 is smaller than ω1. Furthermore, the bottom of the supportingportion 308 b of theMylar 308 may even come into contact with the slopingpaper feeding tray 304. Meanwhile, the front end of thepaper stack 314 comes into contact with thepaper feeding pad 310 and the front end of thepaper sheet 302 a just reaches the feedingend 312. - When the automatic paper feeding roller set 306 starts to rotate around a
roller shaft 316, the automatic paper feeding roller set 306 will carry thepaper sheet 302 a to move towards the feedingend 312 because the front end of thepaper sheet 302 a has reached the feedingend 312 already. After thepaper sheet 302 a has completely passed through the feedingend 312 and is carried forward by the automatic paper feeding roller set 306, the upward elasticity of theMylar 308 will bring the front end of thepaper sheet 302 b to reach the feedingend 312 to be carried forward by the automatic paper feeding roller set 306 like the case mentioned above. When fewer and fewer paper sheets are left at thepaper stack 314, the downward gravity of thepaper stack 314 becomes smaller and smaller accordingly. Owing to the upward elasticity of theMylar 308, the included angle between the bearingboard 307 and the slopingpaper feeding tray 304 will become larger and larger to support the weight of the remaining paper sheets of thepaper stack 314. Consequently, the front end of the remaining paper sheets of thepaper stack 314 will reach the feedingend 312 sequentially, so that the automatic paper feeding roller set 306 may sequentially carry the paper sheets of thepaper stack 314 to move forward. - After the
paper sheets paper stack 314 a are sequentially carried by the paper feeding roller set 306 and fed into the office machine, only thepaper sheet 302 c will be left at the slopingpaper feeding tray 204 like the case inFIG. 3A . Owing to the upward elasticity of theMylar 308, the included angle between the bearingboard 307 and the slopingpaper feeding tray 304 is expanded and becomes ω1 so that thepaper sheet 302 c is pushed upward with the front end of thepaper sheet 302 c reaching the feedingend 312. Consequently, the automatic paper feeding roller set 306 may carry thepaper sheet 302 c to move towards the feedingend 312. The step of automatic document feeding of theautomatic document feeder 300 is completed here. - Referring to
FIG. 4A , a cross-sectional view of the structure of anautomatic document feeder 400 according to preferred embodiment two of the invention is shown. InFIG. 4A , theautomatic document feeder 400 includes a slopingpaper feeding tray 404, an automatic paper feeding roller set 406, apaper feeding pad 410, a bearingboard 407 and an elastic structure, wherein the elastic structure may be a spring or aMylar 408. Theautomatic document feeder 400 is for feeding a to-be-fed paper sheet 402 into an office machine (not shown inFIG. 4A ) such as a printer, a copier, a scanner or a facsimile machine. The slopingpaper feeding tray 404 is for accommodating the to-be-fed paper sheet 402. Both the automatic paper feeding roller set 406 and thepaper feeding pad 410 are disposed at the bottom of the slopingpaper feeding tray 404. A feedingend 412 is formed by a flange of the automatic paper feeding roller set 406 and thepaper feeding pad 410, wherein the flange of the automatic paper feeding roller set 406 and thepaper feeding pad 410 are adjacent to and in contact with each other. Moreover, the automatic paper feeding roller set 406 rotates clockwise around aroller shaft 416 and carries the to-be-fed paper sheet 402 to move forward. - The bearing
board 407, with its one end being pivotally connected to the slopingpaper feeding tray 404, is able to turn around on the sloping paper feeding tray, while the other end of the bearingboard 407 supports the to-be-fed paper sheet 402. TheMylar 408, which is disposed between the slopingpaper feeding tray 404 and the bearingboard 407, may elastically spring the other end of the bearingboard 407 so that an included angle ψ1 is created between the bearingboard 407 and the slopingpaper feeding tray 404. - The
Mylar 408 includes ajunction portion 408 a, a supportingportion 408 b and a bendingportion 408 c, wherein the supportingportion 408 b connects thejunction portion 408 a and the bendingportion 408 c with thejunction portion 408 a being flatly adhered onto the slopingpaper feeding tray 404. The supportingportion 408 b, which creates another included angle with the slopingpaper feeding tray 404, elastically supports the bearingboard 407. The bendingportion 408 c forms an included angle with the supportingportion 408 c, wherein the included angle may be a fixed included angle or an adjustable included angle. Furthermore, one terminal end of the bendingportion 408 c is embedded into aslot 413 of the slopingpaper feeding tray 404. As more and more paper sheets are placed on the bearingboard 407, the included angle between the bearingboard 407 and the slopingpaper feeding tray 404 becomes smaller while the bendingportion 408 c slide inwardly along theslot 413. The bearingboard 407 uses the elasticity of theMylar 408 to support the to-be-fed paper sheet 402 with the front end of to-be-fed paper 402 reaching the feedingend 412, so that the automatic paper feeding roller set 406 may carry the to-be-fed paper sheet 402 to move towards the feedingend 412. - Referring to
FIG. 4B , a cross-sectional view of the structure of theautomatic document feeder 400 ofFIG. 4A with a paper stack being loaded therein is shown. InFIG. 4B , thepaper stack 414 including apaper sheet 402 a, apaper sheet 402 b, apaper stack 414 a and apaper sheet 402 c arranged in a top-down order is loaded in a slopingpaper feeding tray 404. Since the downward gravity of thepaper stack 414 is larger than the gravity of the single to-be-fed paper sheet 402 inFIG. 4A and the upward elasticity of theMylar 408 as well, the included angle between the bearingboard 407 and the slopingpaper feeding tray 404 is smaller than ψ1 while the bendingportion 408 c slides inwardly along theslot 413. Consequently, the bottom of the supportingportion 408 b of theMylar 408 may even come into contact with the slopingpaper feeding tray 404, while the bendingportion 408 c may be completely embedded into theslot 413 with the bottom of the bearingboard 407 touching one end of thejunction portion 408 a. Meanwhile, the front end of thepaper stack 414 reaches thepaper feeding pad 410 and the front end of thepaper sheet 402 a just reaches the feedingend 412. - After the automatic paper feeding roller set 406 has sequentially carried the
paper sheet 402 a, thepaper sheet 402 b and thepaper stack 414 a to move forward and to be fed into the office machine, only thepaper sheet 402 c will be left at the slopingpaper feeding tray 404 like the case inFIG. 4A . Owing to the upward elasticity of theMylar 408, the included angle between the bearingboard 407 and the slopingpaper feeding tray 404 will be expanded and become ψ1, while the bending portion 407 c will slide outwardly along theslot 413 to push thepaper sheet 402 c upward with the front end of thepaper sheet 402 c reaching the feedingend 412. Consequently, the automatic paper feeding roller set 406 may carry thepaper sheet 402 c to move towards the feedingend 412. The step of automatic document feeding of theautomatic document feeder 400 is completed here. - However, anyone who is familiar with the invention will realize that the technique of the invention is not limited thereto. For example, owing to the sloping design of the structure of the sloping paper feeding tray, after a paper sheet is loaded into the sloping paper feeding tray, the paper sheet will be disposed on the bearing board with a slope so that the front end of the paper sheet will automatically slide to the feeding end. Therefore, the upward elasticity of the elastic structure of the invention does not need to be as large as that in
FIG. 1A . A smaller upward elasticity will do as long as the elasticity suffices to enable the front end of the paper sheet to reach the feeding end after the paper sheet slides into the sloping paper feeding tray due to gravity. - With the design of disposing a bearing board on a sloping paper feeding tray, the automatic document feeder disclosed above not only protects the Mylar disposed under the bearing board from being damaged but also reduces the damage rate of the Mylar, so that the lifespan of the Mylar may be lengthened and a stable operation of the automatic document feeder may be achieved.
- While the invention has been described by way of example and in terms of a preferred embodiment, it is to be understood that the invention is not limited thereto. On the contrary, it is intended to cover various modifications and similar arrangements and procedures, and the scope of the appended claims therefore should be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements and procedures.
Claims (15)
1. An automatic document feeder comprising:
a sloping paper feeding tray for accommodating at least one to-be-fed paper sheet;
a bearing board, whose one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, wherein the other end of the bearing board is used for supporting the to-be-fed paper sheet; and
an elastic structure, which is disposed between the sloping paper feeding tray and the bearing board and elastically supports the other end of the bearing board to create a first included angle between the supporting plate and the sloping paper feeding tray.
2. The automatic document feeder according to claim 1 , wherein the elastic structure is a spring.
3. The automatic document feeder according to claim 1 , wherein the elastic structure is a Mylar.
4. The automatic document feeder according to claim 3 , wherein the Mylar comprises:
a junction portion, which is flatly adhered onto the sloping paper feeding tray; and
a supporting portion, which creates a second included angle with the sloping paper feeding tray and elastically supports the bearing board.
5. The automatic document feeder according to claim 4 , wherein the Mylar comprises:
a bending portion, which is disposed at the terminal end of the supporting portion and bends toward the sloping paper feeding tray.
6. The automatic document feeder according to claim 5 , wherein the automatic document feeder further comprises:
a slot, which is disposed on the sloping paper feeding tray and is opposite to the bending portion embedded into the slot.
7. The automatic document feeder according to claim 6 , wherein when the supporting portion is pressed downward, the bending portion will slide towards the slot.
8. The automatic document feeder according to claim 1 , wherein the automatic document feeder further comprises:
an automatic paper feeding roller set disposed at the bottom of the sloping paper feeding tray for feeding the at least one to-be-fed paper sheet.
9. The automatic document feeder according to claim 8 , wherein the automatic document feeder further comprises:
a paper feeding pad, which is disposed at the bottom of the sloping paper feeding tray and comes into contact with the flange of the automatic paper feeding roller set for feeding the at least one to-be-fed paper sheet.
10. An automatic document feeder comprising:
a sloping paper feeding tray for accommodating at least one to-be-fed paper sheet;
a bearing board, which, with its one end being pivotally connected to the sloping paper feeding tray, is able to turn around on the sloping paper feeding tray, while the other end of the bearing board supports the to-be-fed paper sheet; and
a Mylar, which is disposed between the sloping paper feeding tray and the bearing board and elastically supports the other end of the bearing board to create a first included angle between the supporting plate and the sloping paper feeding tray, wherein the Mylar comprises:
a junction portion, which is flatly adhered onto the sloping paper feeding tray; and
a supporting portion, which creates a second included angle with the sloping paper feeding tray and elastically supports the bearing board
11. The automatic document feeder according to claim 10 , wherein the Mylar further comprises:
a bending portion, which is disposed at the terminal end of the supporting portion and bends toward a lateral side of the sloping paper feeding tray.
12. The automatic document feeder according to claim 11 , wherein the automatic document feeder further comprises:
a slot, which is disposed on the sloping paper feeding tray and is opposite to the bending portion embedded into the slot.
13. The automatic document feeder according to claim 12 , wherein when the supporting portion is pressed downward, the bending portion will slide towards the slot.
14. The automatic document feeder according to claim 10 , wherein the automatic document feeder further comprises:
an automatic paper feeding roller set disposed at the bottom of the sloping paper feeding tray for feeding the to-be-fed paper sheet.
15. The automatic document feeder according to claim 14 , wherein the automatic document feeder further comprises:
a paper feeding pad, which is disposed at the bottom of the sloping paper feeding tray and comes into contact with the flange of the automatic paper feeding roller set for feeding the to-be-fed paper sheet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW92132644 | 2003-11-20 | ||
TW092132644A TWI228099B (en) | 2003-11-20 | 2003-11-20 | Automatic paper sheet feeder |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050133984A1 true US20050133984A1 (en) | 2005-06-23 |
Family
ID=34676111
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/942,793 Abandoned US20050133984A1 (en) | 2003-11-20 | 2004-09-17 | Automatic document feeder |
Country Status (2)
Country | Link |
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US (1) | US20050133984A1 (en) |
TW (1) | TWI228099B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI399302B (en) * | 2009-11-13 | 2013-06-21 | Primax Electronics Ltd | Sheet picki-up device of automatic document feeder |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4113244A (en) * | 1975-04-15 | 1978-09-12 | Kurt Ruenzi | Apparatus for automatically feeding individual sheets from a stack through an office machine |
US4726698A (en) * | 1984-07-26 | 1988-02-23 | U.S. Philips Corporation | Device for pressing a stack of sheets against a roller drive of a papersheet separator |
US6135443A (en) * | 1997-06-02 | 2000-10-24 | Canon Kabushiki Kaisha | Sheet feeding device |
-
2003
- 2003-11-20 TW TW092132644A patent/TWI228099B/en not_active IP Right Cessation
-
2004
- 2004-09-17 US US10/942,793 patent/US20050133984A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4113244A (en) * | 1975-04-15 | 1978-09-12 | Kurt Ruenzi | Apparatus for automatically feeding individual sheets from a stack through an office machine |
US4726698A (en) * | 1984-07-26 | 1988-02-23 | U.S. Philips Corporation | Device for pressing a stack of sheets against a roller drive of a papersheet separator |
US6135443A (en) * | 1997-06-02 | 2000-10-24 | Canon Kabushiki Kaisha | Sheet feeding device |
Also Published As
Publication number | Publication date |
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TW200517327A (en) | 2005-06-01 |
TWI228099B (en) | 2005-02-21 |
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Owner name: AVISION INC., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIEN, SZU-HUI;LIN, JACK;REEL/FRAME:015807/0641 Effective date: 20040603 |
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