US3863913A - Apparatus for conveying sheets - Google Patents

Apparatus for conveying sheets Download PDF

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Publication number
US3863913A
US3863913A US407833A US40783373A US3863913A US 3863913 A US3863913 A US 3863913A US 407833 A US407833 A US 407833A US 40783373 A US40783373 A US 40783373A US 3863913 A US3863913 A US 3863913A
Authority
US
United States
Prior art keywords
sheet
feed means
sheet feed
rotating member
leading end
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.)
Expired - Lifetime
Application number
US407833A
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English (en)
Inventor
Van Hirafuji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of US3863913A publication Critical patent/US3863913A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6529—Transporting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/06—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers
    • B65H5/062—Feeding articles separated from piles; Feeding articles to machines by rollers or balls, e.g. between rollers between rollers or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/34—Varying the phase of feed relative to the receiving machine

Definitions

  • ABSTRACT An apparatus for conveying sheets comprising first sheet feed means including a pair of rollers forming a nip therebetween, and second sheet feed means also comprising a pair of rollers forming a nip therebetween. A sheet is fed through the first sheet feed means while maintaining the second sheet feed means at rest, and immediately after the leading end of the sheet has reached the second sheet feed means, the
  • the second sheet feed means is set in operation'continuously until the sheet is fed therethrough for delivery of the sheet.
  • the invention relates to an apparatus for conveying sheets, and more particularly to such apparatus in which the leading end of a sheet being conveyed is momentarily stopped.
  • the sheet delivered from the first system can not be directly fed into the second system, because the differential speeds in the respective systems may cause an undue tension in the sheet.
  • the recording paper can not be directly fed into a developing system for the purpose of developing the image recorded, since the recording paper will be fed intermittently or at a low rate within the recording system while a developing roller included in the developing system will be continuously run at a relatively high speed.
  • an apparatus for conveying sheets comprising first sheet feed means for feeding a sheet at a first speed equal to a sheet processing speed within a first system with which the apparatus is associated, second sheet feed means for feeding the sheet at a second speed equal to a sheet processing speed within a second system with which the apparatus is associated, and control means for maintaining the second sheet feed means inoperative until the leading end of the sheet fed by the first sheet feedmeans reaches the second sheet feed means and for momentarily operating the second sheet feed means, concurrently with or immediately after the sheet has reached the second sheetfeed means, for a short period of time sufficient to cause the leading end of the sheet to be bitten into the second sheet feed means and for thereafter disabling the second sheet feed means, said sheet being continuously fed by the first sheet feed means into the span between the first and second sheet feed means to form a loop in the sheet therebetween, said control means being operative, when the loop in the sheet has grown to a given size, to operate the second sheet feed means until the sheet moves past therethrough.
  • a smooth sheet conveying operation is assured when the sheet processing speed within the second system is more or less higher than the sheet processing speed within the first system, or when the first system and the first sheet feed means are intermittently driven. Because the leading end of the sheet is bitten into the second sheet feed means when a loop of the sheet is formed between the first and second sheet feed means, the resilience in the sheet iseffective to prevent the disengagement of the leading end of the sheet from the second sheet feed means, thereby assuredly allowing a loop of a sufficient size to be formed.
  • FIGS. 1 to 3 are schematic views of the apparatus for conveying sheets according to the invention, illustrating a sheet which is conveyed through two pairs of rollers having different feed rates;
  • FIG. 4 is a perspective view of an exemplary momentary stop device for the leading end of the sheet used in the apparatus for conveying sheets according to the invention
  • FIG. 5 is a cross section of the spring clutch provided at one end of the sheet feed roller
  • FIGS. 6 (a) to (c) are schematic views illustrating the operational relationship between the select member and the operating lever which constitute together a control means.
  • FIG. 7 is a front view of another example of the momentary stop device for the leading end of the sheet which may be used in the apparatus of the invention.
  • FIG. I there are shown a first pair of feed rollers l, 2 rotating in the respective directions indicated'by arrows at a relatively low speed for conveying a-sheet 3, such as one delivered from a facsimile recording system 30, for example, toward a developing system 40.
  • a second pair of feed rollers 5, 6 which normally remain stationary'A pair of guide plates 7, 8 extend intermediate these pairs of rollers.
  • the rollers 5, 6 of the second pair are'shown fixedly mounted on shafts I] and 12, the shaft 12 being a drive shaft and connected with the other shaft 11 through a gearing, not shown.
  • a detection switch 10 is provided to detect the time when the sheet 3 reaches the second pair of rollers 5, 6, and another detection switch 20 is located so as to detect the time when the trailing end of the sheet 3 reaches in the vicinity of the first pair of rollers 1, 2'.
  • a spring clutch 13 is mounted on one end of the drive shaft 12, and comprises a sprocket l4, spring 15 and drum 16.
  • This end of the drive shaft 12 is stepped to have reduced diameters.
  • the boss 14a of the sprocket 14 is rotatably mounted on that portion of the shaft 12 which has the least diameter 12a, and the spring 15 is tightly wound around the periphery of the sprocket as well as that portion of the shaft 12 which has an intermediate diameter 12b.
  • One end of the spring is secured to one end of the drum 16.
  • the drum 16 is formed with a stepped notch 17 into which legs 18a, 19a at the free end of operating levers 18, 19 are disposed.
  • the leg 18a bears against the lateral edge 17a of the notch 17, while a gap 21 is defined between the leg 19a and the lateral edge 17a.
  • the sprocket 14 is normally maintained rotating in the direction indicated by an arrow 24 by a chain 23 which extends there-around and is moving in the direction indicated by an arrow 22.
  • This rotative effort ordinarily would be transmitted to the shaft 12 through the spring 15 which is stressed to engage the surfaces of boss 14a and intermediate diameter 12b but because the operating lever 18 prevents the rotation of the drum 16 to which one end of the spring 15 is secured, the spring is held in a slightly unwound condition so that intermediate diameter 12b, boss 14a, and the spring 15 remain free relative to each other, whereby the drive is not transmitted to the shaft 12.
  • both operating levers 18'and 19 are rotatably mounted on a shaft indicated by an axis 25 which is mounted on a stationary member (not shown), and are connected at their one end with springs 26 and 27, respectively, the other end of which is secured to a stationary point, whereby the levers are urged in a direction to abut against the drum 16 with their legs 18a, 19a.
  • An integral folded piece 19b provided on the upper edge of the operating lever 19 extends over the upper edge of the operating lever 18 to cause a rotation of the operating lever 18 in the direction indicated by an arrow 28 when the operating lever 19 is rotated in this direction by an action to be described later.
  • a torsion spring 34 is disposed around the shaft 32 and its respective ends abut against the slide member 33 and the select member 31, respectively, urging an inclined arm 31b of the select member 31 into abutmentwith the upper edge of the operating lever 18.
  • the slide member 33 is formed with a pair of elongate slots 35 and 36, into which are loosely fitted a pair of stationary pins 37 and 38, respectively.
  • a tension spring 39 has its one end secured to a stationary point and its other end secured to the slide member for urging the latter to move upwardly. However, such movement is limited by the engagement of the pins 37 and 38 with the lower end of the respective elongate slots 35 and 36, respectively.
  • a solenoid 41 is disposed below the slide member 33 and has its plunger 41a connected with the lower end of the slide member 33 through a spring 42.
  • the operating arm31u lect member 31 initially assumes the position shown in FIG. 6 (a), and moves to the position shown in FIG. 6 (b) upon momentary operation of the solenoid 41.
  • the operating lever 18 rotates, its leg 18a is freed from notch 21 and then rides on the peripheral surface of the rotating drum 16, so that the operating lever 18 remains in an inclined .position.
  • the select member 31 rotates under the resilience of the spring 34, and its operating arm 31a moves into alignment with the upper edge of the operating lever 19 as shown in FIG. 6 (c).
  • the continued feeding operation of the first pair of feed rollers 1 and 2 serves form a loop 30 as shown in FIGS. 2 and 3. 1f the leading end of the sheet 3 has not been held between the rollers of the second pair, there is a risk of the leading end of the sheet becoming deflected from the nip between the second pair of rollers 5 and.6 when the loop 3a has grown to a large size.
  • the purpose of the'momentary operation of the clutch 13 is to remove such disadvantage by causingthe leading end of the sheet to be bitten between the rollers 5 and.6 of the second pair as illustrated in FIG. 3.
  • the solenoid 41 is operated for an increased period of time.
  • the operation of the solenoid 41 causesthe select member 31 to rotate the operating lever 19 in the direction of the arrow 28, thereby disengaging the leg 19a of the lever 19 from the notch 17 to release the drum 16 from the constraint.
  • the clutch 13 becomes active again to transmit the drive from the normally rotating sprocket to the shaft 12 and the second pair of feed rollers 5 and 6, whereby the sheet 3 is conveyed in the direction of an arrow 4 at a relatively high speed.
  • the energization of the solenoid 41 is interrupted by a returning motion of the operating rod a when the trailing end of the sheet 3 is delivered from the second pair of feed rollers 5, 6, or by a control over the period of time during which the solenoid 41 is energized, thereby causing the legs 18a, 19a of both operating levers to again bear against the peripheral surface of the rotating drum l6 and to drop into the notch 17 as it rotates to a position opposite them, thereby returning to the original condition shown in FIG. 4.
  • the operating lever 18 returns to its original position, its upper edge abuts against and slides along the inclined arm 31b of the select member 31, thereby bringing the operating arm 31a into alignment with the upper edge of the operating lever 18.
  • FIG. 7 shows another embodiment of the invention in which the drum 16 having a notch 17 (see FIG. 4) is replaced by a notched member 51 having a plurality of notches 51a around its periphery.
  • the notched member 51 may be mounted on the drum 16 with notch 17 eliminated.
  • a detent lever 52 has a tab 520 which is adapted to be received in any one of the notches in the notched member 51 to prevent the rotation of the drum 16.
  • One end of the detent lever 52 is pivotally mounted on a pivot 53 which is stationary and is connected'with a spring 54 having its other end secured to a stationary point, the spring urging the detent lever 52 so as to cause the tab 52a to bear against the notched member 51.
  • a release solenoid 55 has its plunger 55a connected with the detent lever 52 through a spring 56.
  • the free end 52b of the detent lever 52 bears against the periphery of a gear 58 which is rotatably mounted on a stationary shaft 57.
  • the periphery of the gear 58 is also engaged by the free end 59a of an operating pawl 59 which is pivotally mounted at a pivot 61 on a slide member 62.
  • the operating pawl 59 is urged to rotate counter-clockwise by a spring 63 which is secured to the member 62 at one end and to the operating pawl 59 at the other end.
  • the slide member 62 is formed with a pair of spaced elongate slots 62a and 62b in which are fitted stationary pins 64 and 65, respectively, and is urged upward by a tension spring 65 connected thereto, the other end of the spring 65 being secured to a stationary point.
  • the slide member 62 is formed with a folded piece 62c which is connected with the plunger 66a of a release solenoid 66 through a spring 67.
  • the solenoid 66 is used to provide a momentary release of the detent lever 62, while the solenoid 55 is used to release the lever 52 for an increased period of time.
  • the solenoid 66 shown in FIG. 7 is momentarily operated after a definite time delay as mentioned previously, to cause one reciprocatory stroke of the slide member 62.
  • the gear 58 is rotated counterclockwise to raise the free end 52b of the detent lever, thereby disengaging the tab 52a from the notched member 51 and releasing the latter.
  • the release of the notched member 51 continues for a short period of time during which the member 51' rotates in the direction indicated by an arrow 24. This permits the clutch 5 13 (refer FIG.
  • the solenoid 55 is energized, causing the detent lever 52 to be rotated clockwise.
  • the interval during which the solenoid 55 is energized or the period of time during which the notched member 51 is released is relatively long to cause the sheet 3 to be conveyed through the second pair of feed rollers 5 and 6 to a developing system 40 (FIG. 1), for example.
  • the release signal for the solenoid 55 may be provided by a returning movement of the operating rod 10a of the switch 10 or by a separate detection switch which is operated when the trailing end of the sheet 3 has moved past the second pair of feed rollers 5 and 6.
  • An apparatus for conveying sheets comprising:
  • first sheet feed means for feeding a sheet at a first speed
  • second sheet feed means for receiving said sheet from said first sheet feed means and feeding the sheet at a second speed which is greater than the sheet feeding speed of the first sheet feed means
  • control means for maintaining the second sheet feed means inoperativeuntil the leading end of the sheet fed by the first sheet feed means reaches the second sheet feed means, and momentarily operating the second sheet feed means for a short period of time when the leading end of the sheet has reached the second sheet feed means, and for operating the second sheet feed means at the second speed when a loop formed in the sheet between the first and second sheet feed means has grown to a given size subsequent to the termination of the momentary operation of the second sheet feed means.
  • each of the first and second sheet feed means comprises a pair of rollers abutting against each other.
  • An apparatus further comprising means for driving the pair of rollers which constitute the first sheet feed means in intermittent rotating motion with a small incremental angle of rotation.
  • control means comprises:
  • a resiliently pivotable first lever for operating said clutch means upon pivoting to permit a sheet feeding operation by the second sheet feed means when the leading end of the sheet fed by the first feed means reaches the second sheet feed means;
  • operator means including a solenoid for pivoting the first and second levers to render said clutch means operative and for releasing the first and secnd levers to render said clutch means inoperative.
  • control means comprises a rotating member releasably connected to the second sheet feed means and having a plurality of notches along its peripheral surface, a detent lever for engaging a notch in the rotating member for preventing the rotation of the rotating member, a member for disengaging the detent lever from a notch in the rotating member for a short period of time to cause a momentary rotation of the rotating member, and a solenoid for maintaining the detent lever disengaged from a notch in the rotating member to permit a continued rotation of the rotating member,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Controlling Sheets Or Webs (AREA)
US407833A 1972-10-25 1973-10-19 Apparatus for conveying sheets Expired - Lifetime US3863913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47106841A JPS5242384B2 (ja) 1972-10-25 1972-10-25

Publications (1)

Publication Number Publication Date
US3863913A true US3863913A (en) 1975-02-04

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ID=14443898

Family Applications (1)

Application Number Title Priority Date Filing Date
US407833A Expired - Lifetime US3863913A (en) 1972-10-25 1973-10-19 Apparatus for conveying sheets

Country Status (5)

Country Link
US (1) US3863913A (ja)
JP (1) JPS5242384B2 (ja)
CA (1) CA996968A (ja)
FR (1) FR2205049A5 (ja)
GB (1) GB1444639A (ja)

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966198A (en) * 1973-12-27 1976-06-29 Ricoh Co., Ltd. Sheet conveying device
US3991672A (en) * 1975-04-25 1976-11-16 Mfe Corporation Line printer for printing information on tickets
US4017067A (en) * 1976-07-20 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4017065A (en) * 1976-04-29 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4065119A (en) * 1975-10-16 1977-12-27 Hoechst Aktiengesellschaft Process and apparatus for transport of originals in a reproduction apparatus
US4080158A (en) * 1974-11-11 1978-03-21 Canon Kabushiki Kaisha Heat-fixing device
US4179112A (en) * 1976-11-16 1979-12-18 Oce-Van Der Grinten N.V. Apparatus for conveying sheetlike original material to be copied
US4245835A (en) * 1978-03-14 1981-01-20 Ciba-Geigy Ag Sheet storing apparatus
US4300756A (en) * 1980-03-07 1981-11-17 Xerox Corporation In-feed paper buckle control apparatus
US4324478A (en) * 1979-05-24 1982-04-13 Fuji Photo Film Co., Ltd. Photosensitive sheet handling method and device
US4353274A (en) * 1979-08-21 1982-10-12 Sharp Kabushiki Kaisha Roll paper feeding and cutting system
EP0083171A2 (en) * 1981-12-28 1983-07-06 Xerox Corporation Document storage chamber for temporarily storing portions of a document
US4548394A (en) * 1982-09-14 1985-10-22 Mita Industrial Co., Ltd. Copying paper conveying device in electrostatic copying apparatus
US4561756A (en) * 1984-12-13 1985-12-31 Xerox Corporation Short paper path copy sheet transport system
US4685664A (en) * 1982-06-19 1987-08-11 Canon Kabushiki Kaisha Sheet copying device
US4805892A (en) * 1988-04-04 1989-02-21 Eastman Kodak Company Cross-track registration device for sheet transport system
US5168290A (en) * 1990-02-06 1992-12-01 Canon Kabushiki Kaisha Image forming apparatus having recording material carrying means
US5201424A (en) * 1991-07-04 1993-04-13 Ncr Corporation Apparatus for testing the stiffness of a sheet
WO1993020479A1 (en) * 1992-04-02 1993-10-14 Pako Corporation Photographic film handling system with stepper motor control
US5596399A (en) * 1994-09-12 1997-01-21 Xerox Corporation Compact document measuring system for electronic document imaging
US5649276A (en) * 1995-04-24 1997-07-15 Xerox Corporation Use of conical drive rolls in a stalled roll registration subsystem to prevent creasing
US5651539A (en) * 1995-01-10 1997-07-29 Mita Industrial Co., Ltd. Image forming apparatus with smooth transfer sheet roller transport
US20060147241A1 (en) * 2004-12-31 2006-07-06 Custom Engineering Spa Antijamming device for printers put in public places
US20080006995A1 (en) * 2006-07-10 2008-01-10 Manabu Nonaka Image forming apparatus, sheet conveying device, and sheet conveying method
US20080169602A1 (en) * 2006-11-14 2008-07-17 Brother Kogyo Kabushiki Kaisha Sheet Conveying Device
US20120248677A1 (en) * 2011-03-30 2012-10-04 Kyocera Mita Corporation Image forming apparatus and sheet size detection method

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2714679C2 (de) * 1976-04-29 1986-12-18 Xerox Corp., Rochester, N.Y. Führungseinrichtung für Kopieblätter in einer elektrographischen Kopiervorrichtung
JPS586823Y2 (ja) * 1977-01-07 1983-02-05 ロ−レルバンクマシン株式会社 紙幣の搬送装置
GB2121769A (en) * 1982-06-16 1984-01-04 Roneo Alcatel Ltd Sheet feed mechanism
GB2176173A (en) * 1985-06-10 1986-12-17 Malcolm Rogers Feeding paper to a shredding machine
JP2651602B2 (ja) * 1988-07-29 1997-09-10 理想科学工業株式会社 給紙装置
US5609334A (en) * 1995-04-03 1997-03-11 Polaroid Corporation Apparatus and method for transferring sheets of printed media

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062537A (en) * 1959-05-25 1962-11-06 Burroughs Corp Stacking mechanism
US3241831A (en) * 1962-11-01 1966-03-22 Ormig Organisations Mittel G M Method and device for automatic feeding of single sheets of paper or the like
US3410551A (en) * 1966-03-07 1968-11-12 Formfoto Mfg Company Sheet separator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062537A (en) * 1959-05-25 1962-11-06 Burroughs Corp Stacking mechanism
US3241831A (en) * 1962-11-01 1966-03-22 Ormig Organisations Mittel G M Method and device for automatic feeding of single sheets of paper or the like
US3410551A (en) * 1966-03-07 1968-11-12 Formfoto Mfg Company Sheet separator

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3966198A (en) * 1973-12-27 1976-06-29 Ricoh Co., Ltd. Sheet conveying device
US4080158A (en) * 1974-11-11 1978-03-21 Canon Kabushiki Kaisha Heat-fixing device
US3991672A (en) * 1975-04-25 1976-11-16 Mfe Corporation Line printer for printing information on tickets
US4065119A (en) * 1975-10-16 1977-12-27 Hoechst Aktiengesellschaft Process and apparatus for transport of originals in a reproduction apparatus
US4017065A (en) * 1976-04-29 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4017067A (en) * 1976-07-20 1977-04-12 Xerox Corporation Transfer-fusing speed compensation
US4179112A (en) * 1976-11-16 1979-12-18 Oce-Van Der Grinten N.V. Apparatus for conveying sheetlike original material to be copied
US4245835A (en) * 1978-03-14 1981-01-20 Ciba-Geigy Ag Sheet storing apparatus
US4324478A (en) * 1979-05-24 1982-04-13 Fuji Photo Film Co., Ltd. Photosensitive sheet handling method and device
US4353274A (en) * 1979-08-21 1982-10-12 Sharp Kabushiki Kaisha Roll paper feeding and cutting system
US4300756A (en) * 1980-03-07 1981-11-17 Xerox Corporation In-feed paper buckle control apparatus
EP0083171A2 (en) * 1981-12-28 1983-07-06 Xerox Corporation Document storage chamber for temporarily storing portions of a document
EP0083171A3 (en) * 1981-12-28 1984-03-21 Xerox Corporation Document storage chamber for temporarily storing portions of a document
US4451030A (en) * 1981-12-28 1984-05-29 Xerox Corporation Document storage chamber for coupling asynchronously operated document feeding devices
US4685664A (en) * 1982-06-19 1987-08-11 Canon Kabushiki Kaisha Sheet copying device
US4548394A (en) * 1982-09-14 1985-10-22 Mita Industrial Co., Ltd. Copying paper conveying device in electrostatic copying apparatus
US4561756A (en) * 1984-12-13 1985-12-31 Xerox Corporation Short paper path copy sheet transport system
US4805892A (en) * 1988-04-04 1989-02-21 Eastman Kodak Company Cross-track registration device for sheet transport system
US5168290A (en) * 1990-02-06 1992-12-01 Canon Kabushiki Kaisha Image forming apparatus having recording material carrying means
US5201424A (en) * 1991-07-04 1993-04-13 Ncr Corporation Apparatus for testing the stiffness of a sheet
WO1993020479A1 (en) * 1992-04-02 1993-10-14 Pako Corporation Photographic film handling system with stepper motor control
US5596399A (en) * 1994-09-12 1997-01-21 Xerox Corporation Compact document measuring system for electronic document imaging
US5651539A (en) * 1995-01-10 1997-07-29 Mita Industrial Co., Ltd. Image forming apparatus with smooth transfer sheet roller transport
US5828939A (en) * 1995-01-10 1998-10-27 Mita Industrial Co., Ltd. Smooth transfer sheet roller transport
US5649276A (en) * 1995-04-24 1997-07-15 Xerox Corporation Use of conical drive rolls in a stalled roll registration subsystem to prevent creasing
US20060147241A1 (en) * 2004-12-31 2006-07-06 Custom Engineering Spa Antijamming device for printers put in public places
US7322760B2 (en) * 2004-12-31 2008-01-29 Custom Engineering Spa Antijamming device for printers put in public places
US20080006995A1 (en) * 2006-07-10 2008-01-10 Manabu Nonaka Image forming apparatus, sheet conveying device, and sheet conveying method
US7758044B2 (en) * 2006-07-10 2010-07-20 Ricoh Company, Ltd. Image forming apparatus, sheet conveying device, and sheet conveying method
US20080169602A1 (en) * 2006-11-14 2008-07-17 Brother Kogyo Kabushiki Kaisha Sheet Conveying Device
US7665731B2 (en) * 2006-11-14 2010-02-23 Brother Kogyo Kabushiki Kaisha Sheet conveying device
US20120248677A1 (en) * 2011-03-30 2012-10-04 Kyocera Mita Corporation Image forming apparatus and sheet size detection method
US8752828B2 (en) * 2011-03-30 2014-06-17 Kyocera Document Solutions Inc. Image forming apparatus and sheet size detection method

Also Published As

Publication number Publication date
JPS4966139A (ja) 1974-06-26
DE2352338B2 (de) 1977-02-03
DE2352338A1 (de) 1974-05-02
GB1444639A (en) 1976-08-04
JPS5242384B2 (ja) 1977-10-24
CA996968A (en) 1976-09-14
FR2205049A5 (ja) 1974-05-24

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