CA2021815A1 - Tray of discharged paper for recording apparatus - Google Patents
Tray of discharged paper for recording apparatusInfo
- Publication number
- CA2021815A1 CA2021815A1 CA 2021815 CA2021815A CA2021815A1 CA 2021815 A1 CA2021815 A1 CA 2021815A1 CA 2021815 CA2021815 CA 2021815 CA 2021815 A CA2021815 A CA 2021815A CA 2021815 A1 CA2021815 A1 CA 2021815A1
- Authority
- CA
- Canada
- Prior art keywords
- paper sheet
- printed
- paper
- tray
- repeat
- 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
Links
- 230000006872 improvement Effects 0.000 claims description 2
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J13/00—Devices or arrangements of selective printing mechanisms, e.g. ink-jet printers or thermal printers, specially adapted for supporting or handling copy material in short lengths, e.g. sheets
- B41J13/10—Sheet holders, retainers, movable guides, or stationary guides
- B41J13/106—Sheet holders, retainers, movable guides, or stationary guides for the sheet output section
Landscapes
- Pile Receivers (AREA)
- Handling Of Cut Paper (AREA)
Abstract
ABSTRACT
The tray for discharged paper is utilized in a recording apparatus for carrying out repeat-printing while reciprocating a paper being printed. A pair of guide bars are provided to support and guide the edges of a paper sheet along its back surface so as to prevent the paper sheet being repeat-printed from coming into face-to-face contact with an upper receiving face of the tray or with a top surface of another printed paper sheet which has already been printed and stacked on the upper receiving face of the tray, thereby avoiding adhesion of the paper being printed to the stacked paper sheet due to static electricity. This construction can effectively suppress concurrent rolling of the already printed paper sheet to a discharge roller when returning a paper sheet being repeat-printed, and suppress generation of paper jams.
The tray for discharged paper is utilized in a recording apparatus for carrying out repeat-printing while reciprocating a paper being printed. A pair of guide bars are provided to support and guide the edges of a paper sheet along its back surface so as to prevent the paper sheet being repeat-printed from coming into face-to-face contact with an upper receiving face of the tray or with a top surface of another printed paper sheet which has already been printed and stacked on the upper receiving face of the tray, thereby avoiding adhesion of the paper being printed to the stacked paper sheet due to static electricity. This construction can effectively suppress concurrent rolling of the already printed paper sheet to a discharge roller when returning a paper sheet being repeat-printed, and suppress generation of paper jams.
Description
~2~t ~
The present invention relates to an improvement in a tray for paper discharged from a recording apparatus or the type which carries out repeat-printing while reciprocating 8 paper sheet on which printing is being recorded.
Conventionally, there has been generally utilized a diQcharge paper tray having only a receiving face without any guide bar. However, with a conventional discharged paper tray, when a printed paper sheet is partly - and temporarily discharged from the apparatus during the repeat-printing operation, it comes into face-to-face contact with the previously printed paper sheet which has been already discharged onto the tray. Therefore, interfacial adhesion results due to static electricity to thereby frequently generate a paper ~am such that, when returning into the apparatus the printed p~per sheet during the course of the repeat-printing operation, the precedingly printed paper sheet is concurrently rolled into the discharge roller unit together with the returning paper sheet.
` SUMMARY OF THE INVENTION
'' - The present invention provides a pair of spaced apart guide bars on a ~ .
discharge paper tray and normally located along the edges of a printed paper sheet so as to avoid having a printed paper sheet being subjected to a printing operation from coming into full face-to-face contact with a previously printed paper sheet stored on the tray. Consequently, electrostatic adhesion can be prevented between the paper sheet being printed on repeat-printing and the precedingly printed paper sheet to eliminate rolling in of the precedingly printed paper sheet when returning the recording paper sheet during the course of the printing operation, thereby preventing generation of any paper jams. Namely, by avoiding face-to-face contact between printed paper sheets, electrostatic adhesion can be prevented between the paper sheets so as to suppress paper ~ams.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a discharge paper tray in accordance with a preferred embodiment according to the present invention;
Fig. 2 is a front view of the embodiment of Fig. 1: and ~2~
Fig~ 3 is a side view of the embodiment of Fig. 1 showing the discharge paper tray set in a recording apparatus.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
Hereinafter, an embodiment of the present invention will be described in conjunction with the drawings. Fig. 3 shows the state in which a discharge paper tray 1 is set in a recording apparatus 5. Referring to the figureQ, a recording paper sheet 6 is sandwiched by a discharge roller 4 and a pinch roller 8 within the recording apparatus 5. The rotational direction of the discharge roller 4 is switched to effect reciprocating movement of the paper sheet being printed. The switching of rotational direction of the discharge roller 4 is controlled by a sequence controller (not shown) provided within the recording apparatus 5 according to the operating stage of the repeat-printing process being applied to the paper sheet being printed.
During the course of repeat printing, the back face of the paper sheet 6 being printed is supported at its opposite edges A by a pair of guide bars 2, while a central part B of the sheet makes no contact or slight contact with a pre~iously printed paper sheet 7. In this state, the paper sheet 6 is fed in discharge direction C while a rear part of the sheet is held in the recording apparatus 5. When returning the sheet into the apparatus, the discharge roller 4 is switched to rotate in the clockwise direction~ Since face-to-face contact is substantially suppressed between the currently processed sheet 6 and the precedingly printed sheet 7, electrostatic adhesion of the precedingly printed sheet 7 to the currently processed sheet 6 is prevented so that only the sheet 6 is fed back in returning direction D. After carrying out repeatedly the reciprocating movement of the printing paper sheet in this manner, the printing paper sheet 6 is entirely discharged by means of the discharge roller 4.
Immediately after the trailing end of the sheet 6 has left the discharge roller, the paper sheet 6 is bent due to its weight and falls down between the guide bars 2 in the direction indicated by tbe arrows E to rest on a recei~ing face 3 of the discharge paper tray 1. For this, the pair of guide bars 2 are fixed to the discharge paper tray 1 at their leg portions ln spaced relation from one another a distance wider than the width of the 2~2~
paper sheet 6, while respective upper supporting portions of the pair of guide bars 2 are spaced apart a distance narrower than the width of the paper sheet 6 so as to support the same. The length of the guide bars is set to be longer than the length of the sheet. By such an arrangement, the paper sheet 6 can be made to not contact the receiving face 3 of the trsy or can be made to slightly contact the face 3 along the central portion B
of the sheet 6 when the sheet 6 is partly discharged during the course of the reciprocating movement thereof. Consequently, after finishing printing, the paper sheet 6 can fall onto the discharge paper tray.
Further, in order to ad~ust for different sizes of paper sheets, the tray l is formed, on its end faces, with a plurality of support holes a, b for supporting the guide bars 2 as shown in Figs. 1 and 2. When handling a narrow sized paper sheet, the guide bars 2 are engaged in the holes a.
When treating a wider papar sheet, the other holes b are selected to fix or support the guide bars 2.
As described above, according to the present invention, a pair of guide bars are provided in spaced relation from one another in the widthwise direction of a discharge paper tray so as to prevent reverse rolling-in of discharged paper sheet such as OHP sheet to thereby prevent paper jams. By such a simplified mechanism, there are achieved various advantages such as product cost reduction, improved durability and improved reliability with respect to repeated discharge performance.
The present invention relates to an improvement in a tray for paper discharged from a recording apparatus or the type which carries out repeat-printing while reciprocating 8 paper sheet on which printing is being recorded.
Conventionally, there has been generally utilized a diQcharge paper tray having only a receiving face without any guide bar. However, with a conventional discharged paper tray, when a printed paper sheet is partly - and temporarily discharged from the apparatus during the repeat-printing operation, it comes into face-to-face contact with the previously printed paper sheet which has been already discharged onto the tray. Therefore, interfacial adhesion results due to static electricity to thereby frequently generate a paper ~am such that, when returning into the apparatus the printed p~per sheet during the course of the repeat-printing operation, the precedingly printed paper sheet is concurrently rolled into the discharge roller unit together with the returning paper sheet.
` SUMMARY OF THE INVENTION
'' - The present invention provides a pair of spaced apart guide bars on a ~ .
discharge paper tray and normally located along the edges of a printed paper sheet so as to avoid having a printed paper sheet being subjected to a printing operation from coming into full face-to-face contact with a previously printed paper sheet stored on the tray. Consequently, electrostatic adhesion can be prevented between the paper sheet being printed on repeat-printing and the precedingly printed paper sheet to eliminate rolling in of the precedingly printed paper sheet when returning the recording paper sheet during the course of the printing operation, thereby preventing generation of any paper jams. Namely, by avoiding face-to-face contact between printed paper sheets, electrostatic adhesion can be prevented between the paper sheets so as to suppress paper ~ams.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a discharge paper tray in accordance with a preferred embodiment according to the present invention;
Fig. 2 is a front view of the embodiment of Fig. 1: and ~2~
Fig~ 3 is a side view of the embodiment of Fig. 1 showing the discharge paper tray set in a recording apparatus.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENT
Hereinafter, an embodiment of the present invention will be described in conjunction with the drawings. Fig. 3 shows the state in which a discharge paper tray 1 is set in a recording apparatus 5. Referring to the figureQ, a recording paper sheet 6 is sandwiched by a discharge roller 4 and a pinch roller 8 within the recording apparatus 5. The rotational direction of the discharge roller 4 is switched to effect reciprocating movement of the paper sheet being printed. The switching of rotational direction of the discharge roller 4 is controlled by a sequence controller (not shown) provided within the recording apparatus 5 according to the operating stage of the repeat-printing process being applied to the paper sheet being printed.
During the course of repeat printing, the back face of the paper sheet 6 being printed is supported at its opposite edges A by a pair of guide bars 2, while a central part B of the sheet makes no contact or slight contact with a pre~iously printed paper sheet 7. In this state, the paper sheet 6 is fed in discharge direction C while a rear part of the sheet is held in the recording apparatus 5. When returning the sheet into the apparatus, the discharge roller 4 is switched to rotate in the clockwise direction~ Since face-to-face contact is substantially suppressed between the currently processed sheet 6 and the precedingly printed sheet 7, electrostatic adhesion of the precedingly printed sheet 7 to the currently processed sheet 6 is prevented so that only the sheet 6 is fed back in returning direction D. After carrying out repeatedly the reciprocating movement of the printing paper sheet in this manner, the printing paper sheet 6 is entirely discharged by means of the discharge roller 4.
Immediately after the trailing end of the sheet 6 has left the discharge roller, the paper sheet 6 is bent due to its weight and falls down between the guide bars 2 in the direction indicated by tbe arrows E to rest on a recei~ing face 3 of the discharge paper tray 1. For this, the pair of guide bars 2 are fixed to the discharge paper tray 1 at their leg portions ln spaced relation from one another a distance wider than the width of the 2~2~
paper sheet 6, while respective upper supporting portions of the pair of guide bars 2 are spaced apart a distance narrower than the width of the paper sheet 6 so as to support the same. The length of the guide bars is set to be longer than the length of the sheet. By such an arrangement, the paper sheet 6 can be made to not contact the receiving face 3 of the trsy or can be made to slightly contact the face 3 along the central portion B
of the sheet 6 when the sheet 6 is partly discharged during the course of the reciprocating movement thereof. Consequently, after finishing printing, the paper sheet 6 can fall onto the discharge paper tray.
Further, in order to ad~ust for different sizes of paper sheets, the tray l is formed, on its end faces, with a plurality of support holes a, b for supporting the guide bars 2 as shown in Figs. 1 and 2. When handling a narrow sized paper sheet, the guide bars 2 are engaged in the holes a.
When treating a wider papar sheet, the other holes b are selected to fix or support the guide bars 2.
As described above, according to the present invention, a pair of guide bars are provided in spaced relation from one another in the widthwise direction of a discharge paper tray so as to prevent reverse rolling-in of discharged paper sheet such as OHP sheet to thereby prevent paper jams. By such a simplified mechanism, there are achieved various advantages such as product cost reduction, improved durability and improved reliability with respect to repeated discharge performance.
Claims (2)
1. In a recording apparatus for carrying out repeat-printing while reciprocating a paper sheet being printed, the improvement comprising:
a tray for receiving a discharged paper sheet; and a pair of guide bars disposed on the tray in spaced relation from one another in a widthwise direction of the tray for guiding and supporting opposite edges of the paper sheet during the course of reciprocating movement of the paper sheet in repeat-printing.
a tray for receiving a discharged paper sheet; and a pair of guide bars disposed on the tray in spaced relation from one another in a widthwise direction of the tray for guiding and supporting opposite edges of the paper sheet during the course of reciprocating movement of the paper sheet in repeat-printing.
2. A recording apparatus according to claim 1, wherein the tray has a plurality of support holes which can be selected to support the pair of guide bars a given distance apart corresponding to the width of a paper sheet to be repeat-printed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8769689U JPH0328167U (en) | 1989-07-25 | 1989-07-25 | |
| JPU1-87696 | 1989-07-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2021815A1 true CA2021815A1 (en) | 1991-01-26 |
Family
ID=13922089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2021815 Abandoned CA2021815A1 (en) | 1989-07-25 | 1990-07-24 | Tray of discharged paper for recording apparatus |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0328167U (en) |
| CA (1) | CA2021815A1 (en) |
| DE (1) | DE4023402A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4345331C2 (en) * | 1992-09-10 | 1998-11-12 | Seiko Epson Corp | Printer with a sheet feeder located within its housing |
| US5648807A (en) * | 1992-09-10 | 1997-07-15 | Seiko Epson Corporation | Ink jet recording apparatus having an antismear sheet deformation discharge system |
| US5324020A (en) * | 1992-09-29 | 1994-06-28 | Hewlett-Packard Company | Paper stacking system for printers |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61211265A (en) * | 1985-03-14 | 1986-09-19 | Eikou:Kk | Stacking device for printed material |
-
1989
- 1989-07-25 JP JP8769689U patent/JPH0328167U/ja active Pending
-
1990
- 1990-07-23 DE DE19904023402 patent/DE4023402A1/en not_active Withdrawn
- 1990-07-24 CA CA 2021815 patent/CA2021815A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| DE4023402A1 (en) | 1991-01-31 |
| JPH0328167U (en) | 1991-03-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |