EP0403481A1 - Dispositif de guidage du papier pour imprimantes. - Google Patents
Dispositif de guidage du papier pour imprimantes.Info
- Publication number
- EP0403481A1 EP0403481A1 EP89900192A EP89900192A EP0403481A1 EP 0403481 A1 EP0403481 A1 EP 0403481A1 EP 89900192 A EP89900192 A EP 89900192A EP 89900192 A EP89900192 A EP 89900192A EP 0403481 A1 EP0403481 A1 EP 0403481A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- paper
- roller
- trough
- guide device
- tray
- 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.)
- Granted
Links
- 238000005452 bending Methods 0.000 claims description 15
- 238000007639 printing Methods 0.000 claims description 12
- 239000000969 carrier Substances 0.000 claims description 8
- 230000005693 optoelectronics Effects 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 2
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims description 2
- 239000007924 injection Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000007769 metal material Substances 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000032258 transport Effects 0.000 claims 5
- 239000002991 molded plastic Substances 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract 2
- 238000007906 compression Methods 0.000 abstract 2
- 239000000654 additive Substances 0.000 description 4
- 239000006260 foam Substances 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 210000002105 tongue Anatomy 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004020 luminiscence type Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000725 suspension Substances 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
- B41J13/02—Rollers
- B41J13/036—Rollers co-operating with a roller platen
- B41J13/048—Front and rear rollers both mounted on a common carrier
- B41J13/054—Front and rear rollers both mounted on a common carrier on the paper apron concentric with the roller platen
Definitions
- the invention relates to a paper guide device for printing devices according to the preamble of the main claim.
- Paper guide devices of this type are generally known and are successfully used for the most varied types of construction of the printing devices on the market.
- the most important components of such paper guide devices are a paper support designed as a paper roller, generally a paper guide trough, which is combined with paper guide rollers and is arranged below the platen roller in such a way that the writing sheet drawn through from behind under the platen roller can be guided forward into the writing line area.
- a paper feed device for printing devices with a paper carrier designed as a paper roll and a resiliently resting on the paper roll paper guide trough with paper pressure elements is known.
- the paper guide trough consists of a rigid roller carrier with four paper pressure rollers arranged on it. Centrally acting lever arrangements are attached to these paper pressure rollers.
- Such a gimbal suspension of the roll carriers means that the paper pressure rolls lie evenly on the paper roll or the record carrier guided between them.
- the platen roller can be pivoted in such a way that in one position for the folding paper operation the lever has no influence on the pressure force of the spring and in the other position the second lever arm blocks the paper web of the folding paper and the first lever arm exerts additional pressure in the direction of the platen roller on the spring .
- the object of the invention is therefore to provide a device for the transport and positioning of record carriers of all kinds, which ensures a precise location assignment to the printhead and the paper auxiliary devices, as well as ensuring a positionally accurate retraction of the record carriers and an exact exit angle of the record carriers, with production-favorable manufacture.
- Paper additives such as feeder, form add-on or single sheet add-on also allow easy assembly and interchangeability of the complete assembly in the printing device.
- the pressing force for the paper transport is exerted by simple, straight bending bars, which act on roll supports that are free of momentum and oscillate, and adjusted in several stages via swiveling adjusting levers, an exact position of the recording media from the roller wedge and a slip-free transport of the recording media is ensured. Furthermore, processing of various print media such as film, single sheet and continuous form in different dimensions is guaranteed depending on the number of roll systems.
- a metallic paper pressure apron arranged on the front wall of the paper tub, which connects the recording medium in front of the impression parts of the Printhead presses and smoothes is designed as a closed surface, whereby contamination of the paper pressure roller by ink drops is prevented and dusting of the ink head due to paper abrasion is minimized.
- a defined angle and bending length of the paper pressure apron by means of a fastening strip achieve a precise paper exit angle.
- Another advantage is that a mass connection is made by molded spring tongues on the foot part of the paper pressure apron, which are supported on a part of the printer chassis when the paper guiding device of the printing device is installed, and thus a static charge of the recording medium is prevented.
- a strip of absorbent material is provided between the paper apron and the fastening strip, which absorbs lost ink drops and can be easily replaced as a wearing part if required.
- a monitoring device consisting of an optoelectronic and a mechanical scanner, is centered and screwed in position on a side wall of the paper trough, that is to say it is firmly assigned to the paper guide device, eliminates the need for a separate division and adjustment of these scanners.
- FIGs 1 to 3 a paper feed device according to the invention in different perspective views
- Figure 4 is a detailed view of an essential part of the paper guide device
- Figure 5 is a side view of the paper guide device in section.
- a paper tray 117 which is arranged over the entire width of a printing device, not shown here, and is designed in one piece as a carrier part, has a curved contour 100 on its upper side.
- This contour 100 is adapted to the inlet of a recording medium 14 to be printed with the aid of a print head 16, the diameter of a transport roller 15 and an outlet of the recording medium 14 required for the printing principle provided in each case.
- the underside of the paper tub 117 is provided with a plurality of transverse webs 116 connecting the front and rear walls. Lugs 120 are formed on two transverse webs 116 arranged in the area near the edge, into which profile holes 121 are inserted for fastening the paper tray 117.
- the transverse webs 116 form individual chambers, which are not shown in more detail in FIGS. 1 to 3, wherein in two chambers spaced apart from one another at a certain distance, torque-free and oscillating roller carriers 2 are provided.
- the roller carriers 2 serve to hold paper pressure rollers 5 which, together with the transport roller 15 serving as a friction drive for the recording medium 14, ensure slip-free paper transport.
- the roller supports 2 contain two support arms 203 which are formed symmetrically with respect to the center of the guide pins 201, the free ends of which are each provided with two rotatably mounted paper pressure rollers 5 which are located close to one another.
- the surface of the paper tray 117 is interrupted at these points according to the geometry of the paper pressure rollers 5 "'by means of rectangular openings 114 in the contour 100 of the paper tray 117 and rectangular recesses 119 at the edge of the paper tray 117, so that the paper pressure rollers 5 partially out of the contour 100
- the guide pin 201 is guided at its end facing the transport roller 15 in a recess 118 on the paper trough 117, and on the other hand the other end of the guide pin 201 has a guide slot 202 running at right angles to the direction of the writing line for mounting a round bending rod 3, which supports the pressing force for creates a trouble-free paper transport on the paper pressure rollers 5.
- a cutout 101 serving as a support on the front wall of the paper tray 117 and on a diamond-shaped adjusting lever 4 arranged on the rear wall of the paper tray 117.
- the bending rod 3 protrudes through a for this purpose
- FIG. 4 shows the actuating lever 4 in the unmounted state.
- the backdrop 400 of the actuating lever 4 is used to adjust the pressing force of the paper pressure rollers 5. Depending on the position of the bending rod 3 in the backdrop 400, it is more or less tensioned and thus its spring stroke is changed, whereby the Roller carrier 2 with the paper pressure rollers 5 mounted thereon is pressed against the transport roller 15 with a defined force in accordance with the respectively selected setting.
- a cutting edge bearing 106 and a holding and guide bracket 105 are provided on the back of the paper tub 117, which encloses the control lever 4 in the area of its link 400 in a U-shape.
- the length of the control lever 4 is dimensioned such that when one end of the control lever 4 is supported in the cutting edge bearing 106, the other end protrudes somewhat beyond the upper edge of the rear wall.
- a plurality of adjacent groups of notches 103 are provided on the upper edge of the rear wall of the paper tray 117 to identify the locking positions.
- the adjusting lever 4 By pivoting the adjusting lever 4 by means of its attachment 402 from a middle position referred to as the standard position into one of the adjacent positions, the bending rod 3 slides in the sawtooth-shaped backdrop 400 into an adjacent locking position of the backdrop 400, thereby changing the pressing force for the paper transport and at the same time adjusting the position of the neck 102 on the corresponding notches 103 of the tub 117 is displayed.
- the holding and guide bracket 105 has in its middle part an upwardly open, funnel-shaped groove 104, in which the adjusting lever 4 can be brought into an assembly position without any problems and from a stud 401 arranged below the link 400 to the assembly of the bending rod 3 determines the latching position and presses the actuating lever 4 into the cutting bearing 106, is prevented from falling out.
- bores 115 are provided on the actuating levers 4 on the halves facing the notches 103, on which holes, if necessary, a line drawn in broken lines in FIG Adjusting lever 4 connecting rod 6 can be articulated. In this embodiment it is ensured that the two control levers 4 can only be pivoted in the same direction, whereby a different force setting is avoided.
- a resilient paper pressure apron 7 made of metallic material is provided on the front wall of the paper tub 117 and extends across the entire width of the platen roller 15.
- the contour 100 of the paper trough 117 is matched to the paper pressure apron 7 by a tapering edge in the front area in such a way that kinking of the recording medium 14, in particular when using folding paper, and a line spacing error associated therewith is avoided.
- the paper pressure apron 7 lies tangentially against the platen roller 15, as a result of which the recording medium 14 is pressed on and thereby smoothed.
- the pressure apron 7 is designed as a closed surface in order to prevent contamination of the paper pressure rollers 5 by ink drops when using an ink print head as print head 16 and to minimize dusting of the ink print head due to paper abrasion.
- two spring tongues 700 are formed on their regions near the edge, which are supported on a part of the printer chassis 18 in the printing device 1 when the paper guide device 1 is mounted, thereby establishing a ground connection between the paper pressure apron 7 and the printer chassis 18.
- a foam strip 9 is applied to the paper pressure apron 7 over its entire width, which picks up the possibly lost ink drops from an ink print head.
- the paper pressure apron 7 and the foam strip 9 are with the help of a fastening strip 8 at the front wall of the paper tray 117 pressed and locked.
- molded-on centering pins 107 are provided on the paper tub 117, by means of which both the paper pressure apron 7 and the foam strip 9 and also the fastening strip 8 are fixed. With the aid of three screwing points distributed symmetrically over the width of the fastening strip 8, the fastening strip 8 is fastened to the paper tub 117 by means of screws 19.
- the fastening strip 8 is interrupted like a comb.
- a precise exit angle of the recording medium 14 which is necessary in the case of ink printing is thereby ensured.
- the screwed fastening strip 8 prevents the bending rod 3 from sliding out of the cutout 101 serving as a support on the front wall of the paper tub 117.
- An optoelectronic scanner in the form of a is arranged on the left housing wall of the paper tub 117 for monitoring and positioning the recording medium 14
- Light barrier 17 and a mechanical scanner consisting of a microswitch 11 and a switching wire 12 associated with this microswitch 11.
- the light barrier 17, which can be implemented, for example, as a fork light barrier with a luminescence diode as a transmitter and a phototransistor as a receiver, is constructed on a module 10 and just as the microswitch 11 is precisely centered on mounting pin 113 on the paper tray 117 and is releasably attached to the housing wall together with a screw 13.
- German patent application P 37 31 538.2 The A more detailed structure and the mode of operation of such a paper monitoring device can be found in German patent application P 37 31 538.2.
- support ribs 108 projecting to the rear are formed, which serve as support points for the paper tub 117 when the paper guiding device 1 is preassembled, for example while the fastening strip 8 is screwed on.
- a plurality of latching and centering elements projecting downward are provided on the underside of the paper tub 117. Specifically, these are each a cuboid-shaped support pin 109 arranged on the front and rear wall about half the width of the paper tray 117 and a snap-in nose 111 and 112 molded onto the side parts of the paper tray 1.
- a wedge-shaped centering nose 110 is provided on the side to which the assembly 10 is screwed.
- the freely projecting ends of these locking and centering elements 109, 110, 111, 112 are matched to one another in terms of their length, so that an assembly plane is thereby formed and the paper guide device 1 can be placed flat on a base, preassembled and stored.
- the completely preassembled paper guide device 1 is plugged onto the printer chassis 18 by means of the centering lug 110 and the snap lugs 111 and 112 and is precisely assigned to the printing device and existing paper additives such as form additive, single sheet additive or feeder and locked in place as an assembly aid. Then it is screwed to the printer stand to ensure dimensional stability.
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Handling Of Continuous Sheets Of Paper (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Abstract
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3802532 | 1988-01-28 | ||
DE3802532A DE3802532A1 (de) | 1988-01-28 | 1988-01-28 | Papierfuehrungseinrichtung fuer druckeinrichtungen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0403481A1 true EP0403481A1 (fr) | 1990-12-27 |
EP0403481B1 EP0403481B1 (fr) | 1991-09-04 |
Family
ID=6346177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89900192A Expired - Lifetime EP0403481B1 (fr) | 1988-01-28 | 1988-12-16 | Dispositif de guidage du papier pour imprimantes |
Country Status (4)
Country | Link |
---|---|
US (1) | US5042953A (fr) |
EP (1) | EP0403481B1 (fr) |
DE (2) | DE3802532A1 (fr) |
WO (1) | WO1989007050A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3916982A1 (de) * | 1989-05-24 | 1990-02-08 | Siemens Ag | Steuerbare kupplung zur mechanischen antriebsentkopplung von motorisch parallel angetriebenen wellen |
CA2014652A1 (fr) * | 1989-09-29 | 1991-03-29 | Anthony W. Ebersole | Eliminateur d'espacement pour mecanisme d'entrainement de support d'impression |
JP2800687B2 (ja) * | 1994-07-11 | 1998-09-21 | 富士通株式会社 | 用紙搬送装置 |
US6612562B2 (en) | 2001-12-21 | 2003-09-02 | Pitney Dowes Inc. | Method and system for feeding media to a printer |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1655425A (en) * | 1924-03-29 | 1928-01-10 | Underwood Typewriter Co | Typewriting machine |
US1627123A (en) * | 1925-05-02 | 1927-05-03 | Underwood Typewriter Co | Typewriting machine |
US2218108A (en) * | 1939-01-16 | 1940-10-15 | L C Smith & Corona Typewriters | Paper feed mechanism |
US4215945A (en) * | 1978-12-26 | 1980-08-05 | International Business Machines Corporation | Paper feeding apparatus |
DE2946033C2 (de) * | 1979-11-14 | 1982-08-19 | Siemens AG, 1000 Berlin und 8000 München | Papiereinzugsvorrichtung für Druckeinrichtungen |
DE8006325U1 (de) * | 1980-03-07 | 1981-04-09 | Siemens AG, 1000 Berlin und 8000 München | Papiereinzugsvorrichtung fuer fernschreibmaschinen |
AT381388B (de) * | 1981-06-12 | 1986-10-10 | Philips Nv | Schreibwerk mit einer fuehrungseinrichtung fuer einen aufzeichnungstraeger |
US4364683A (en) * | 1981-12-23 | 1982-12-21 | International Business Machines Corporation | Paper feed roller assembly for a typewriter or printer |
DE3202216A1 (de) * | 1982-01-25 | 1983-07-28 | Olympia Werke Ag, 2940 Wilhelmshaven | Schreib- oder aehnliche bueromaschine mit einer aufnahmevorrichtung fuer einen kartenhalter |
DE3214549C2 (de) * | 1982-04-20 | 1985-01-17 | Siemens AG, 1000 Berlin und 8000 München | Transportvorrichtung für randgelochtes Faltpapier und für Rollenpapier |
US4491854A (en) * | 1982-07-29 | 1985-01-01 | U.S. Philips Corporation | Printer with a guide ruler for flattening a record carrier |
JPS6032684A (ja) * | 1983-08-01 | 1985-02-19 | Matsushita Electric Ind Co Ltd | 給紙装置 |
JPS60116487A (ja) * | 1983-11-30 | 1985-06-22 | Nec Home Electronics Ltd | プリンタの紙送り装置 |
US4592670A (en) * | 1984-06-29 | 1986-06-03 | International Business Machines Corporation | Angular motion paper feed release system |
JPS61132361A (ja) * | 1984-11-30 | 1986-06-19 | Tokyo Juki Ind Co Ltd | 印字装置における印字用紙送り機構 |
JPS6282065A (ja) * | 1985-10-07 | 1987-04-15 | Seikosha Co Ltd | プリンタの紙検出装置 |
US4773782A (en) * | 1985-10-28 | 1988-09-27 | Canon Kabushiki Kaisha | Apparatus for transferring sheet material |
-
1988
- 1988-01-28 DE DE3802532A patent/DE3802532A1/de active Granted
- 1988-12-16 DE DE8989900192T patent/DE3864690D1/de not_active Expired - Fee Related
- 1988-12-16 US US07/548,923 patent/US5042953A/en not_active Expired - Lifetime
- 1988-12-16 WO PCT/DE1988/000766 patent/WO1989007050A1/fr active IP Right Grant
- 1988-12-16 EP EP89900192A patent/EP0403481B1/fr not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO8907050A1 * |
Also Published As
Publication number | Publication date |
---|---|
US5042953A (en) | 1991-08-27 |
DE3802532A1 (de) | 1989-08-10 |
WO1989007050A1 (fr) | 1989-08-10 |
DE3864690D1 (de) | 1991-10-10 |
DE3802532C2 (fr) | 1990-04-19 |
EP0403481B1 (fr) | 1991-09-04 |
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