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US20050017445A1 - Paper carrying mechanism - Google Patents

Paper carrying mechanism Download PDF

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Publication number
US20050017445A1
US20050017445A1 US10/882,535 US88253504A US2005017445A1 US 20050017445 A1 US20050017445 A1 US 20050017445A1 US 88253504 A US88253504 A US 88253504A US 2005017445 A1 US2005017445 A1 US 2005017445A1
Authority
US
United States
Prior art keywords
roller
recording medium
carrying
pressing roller
paper
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
Application number
US10/882,535
Other languages
English (en)
Inventor
Hitoshi Funaki
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.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric 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 Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Assigned to ALPS ELECTRIC CO., LTD. reassignment ALPS ELECTRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUNAKI, HITOSHI
Publication of US20050017445A1 publication Critical patent/US20050017445A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • 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
    • B41J13/03—Rollers driven, e.g. feed rollers separate from platen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/143—Roller pairs driving roller and idler roller arrangement
    • B65H2404/1431—Roller pairs driving roller and idler roller arrangement idler roller details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/10—Rollers
    • B65H2404/14—Roller pairs
    • B65H2404/144—Roller pairs with relative movement of the rollers to / from each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/13—Thickness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/20—Location in space
    • B65H2511/22—Distance

Definitions

  • the present invention relates to a paper carrying mechanism used for a printing device such as a printer that is capable of suitably carrying a recording medium by a carrying roller and a pressing roller.
  • a conventional paper carrying mechanism is arranged on the printer to feed a recording medium received in a paper feeding tray (not shown) or to feed back the recording medium on which an image has been printed in a printing section to discharge the recording medium to the outside of the printer.
  • the paper carrying mechanism has arranged therein a carrying roller 52 rotatable by the rotation of a motor (not shown) and a pressing roller 53 pressed against the carrying roller 52 and rotated in such a manner to follow the rotation of the carrying roller 52 .
  • the pressing roller 53 is supported by a leaf spring 55 mounted on a casing on the printer side with a small screw 54 , and it is elastically biased against the carrying roller 52 by the leaf spring 55 . Further, a recording medium 56 having contained with a thick paper, such as a printing paper, received in a paper feed tray is pressure-contacted with the lower part of the carrying roller 52 .
  • the recording medium 56 can be carried in the direction of an arrow A by the rotation of the carrying roller 52 in its clockwise direction.
  • a printing section (not shown) having a printhead is arranged on the left side of the paper carrying mechanism 51 in the drawing, and a paper feed roller (not shown) and a pressure-contact roller (not shown) which are capable of securely gripping the recording medium 56 are arranged between the printing section and the paper carrying mechanism 51 .
  • the recording medium 56 is carried in the direction of the arrow A by the rotation of the carrying roller 52 to carry the recoding medium to the printing section.
  • the recording medium 56 gripped by the paper feed roller and the pressure-contact roller is capable of being reciprocally carried in the printing section by the reciprocal rotation of the paper feed roller.
  • the recording medium 56 received in the paper feed tray is carried in the direction of the arrow A by the rotation of the carrying roller 52 in its clockwise direction, and is carried to the printing section (not shown) on the left side in the drawing.
  • the recording medium 56 at this time is gripped by the paper feed roller and the pressing roller, which are arranged near the printing section, and is carried to the printing section whose thermal head is in a head-up state.
  • a rear end 56 b of the recording medium 56 is detected to perform the heading at the start of printing.
  • the recording medium 56 at this time is in a state that is released from the pressure-contact by the carrying roller 52 , and is gripped by the paper feed roller and the pressure-contact roller.
  • a thermal head is headed down to pressure-contact an ink ribbon with the recording medium 56 , and the rotation of the paper feed roller causes the recording medium 56 to be pulled and fed back in the direction of an arrow B opposite to the direction the arrow A.
  • the selective heat generation by heat generating elements of the thermal head allows first color ink of the ink ribbon to be thermally transferred to the recording medium 56 , thereby printing a first color image onto the recording medium 56 .
  • the recording medium 56 that is being pulled and fed back in the direction of the arrow B by the paper feed roller is fed back in the direction of the arrow B with the rear end 56 b thereof nipped between the carrying roller 52 and the pressing roller 53 .
  • a recording medium 56 is repeatedly carried to the printing section so that a second color ink can be overprinted on the first color image, and a third color ink can be overprinted on the second color image, thereby printing a desired color image on the recording medium 56 .
  • the present invention has been made in consideration of the above-mentioned problems. It is therefore an object of the present invention to provide a paper carrying mechanism in which the number of parts and assembly processes can be reduced, and the carrying deviation does not occur when a recording medium is reciprocally carried.
  • a paper carrying mechanism of the present invention comprises: a carrying roller rotationally driven by the driving force of a drive motor, and a rotatable pressing roller arranged above the carrying roller.
  • the pressing roller by its own weight, is adapted to be capable of pressing a recording medium carried between the pressing roller and the carrying roller.
  • a gap smaller than the thickness of the recording medium is formed between the pressing roller and the carrying roller.
  • a rotating shaft of the carrying roller is rotatably supported by a casing on the side of a printing device, and a rotating shaft of the pressing roller is supported in a vertically elongated supporting hole formed in the casing so as to be vertically movable.
  • the pressing roller is pushed up so that the rotating shaft thereof ascends in the elongated hole, and the recording medium is pressed against the carrying roller by the weight of the pressing roller.
  • the gap is formed to have 1 ⁇ 2 of the thickness of the recording medium.
  • FIG. 1 is a schematic diagram for explaining a printing device having a paper carrying mechanism according to the present invention
  • FIG. 2 is an enlarged view of the paper carrying mechanism according to the present invention.
  • FIG. 3 is a schematic diagram for explaining a conventional paper carrying mechanism
  • FIG. 4 is a schematic diagram for explaining problems of the conventional paper carrying mechanism.
  • FIG. 1 is a schematic diagram for explaining a printing device using a paper carrying mechanism according to the present invention
  • FIG. 2 is an enlarged view of the paper carrying mechanism according to the present invention.
  • a paper carrying mechanism 1 of the present invention is incorporated in a printing device P so that a recording medium 5 can be carried to between a paper feed roller 6 and a pressure-contact roller 7 , which will be described below.
  • the paper carrying mechanism 1 is arranged such that a carrying roller 2 having its outer circumferential portion coated with a high frictional member, such as rubber, is rotatably connected to a motor (not shown) via a transmission mechanism (not shown).
  • a motor not shown
  • a transmission mechanism not shown
  • a rotatable pressing roller 3 is arranged above the carrying roller 2 .
  • the pressing roller 3 is made of metal having large specific gravity.
  • rotating shafts 2 a and 3 a of the carrying roller 2 and the pressing roller 3 are respectively supported by a part of a casing 4 on the printing device P side.
  • a supporting hole 4 a that supports the rotating shaft 3 a of the pressing roller 3 is formed in the shape of a vertically elongated hole. Therefore, the rotating shaft 3 a of the pressing roller 3 is vertically movable along the elongated supporting hole 4 a.
  • a predetermined size of a gap G is formed between the pressing roller 3 at the time of being supported by the supporting hole 4 a and being descended by its own weight, and the carrying roller 2 .
  • the gap G between the carrying roller 2 and the pressing roller 3 is formed to have about 1 ⁇ 2 of the thickness T of the recording medium 5 having contained with comprising a thick paper, such as a printing paper.
  • the recording medium 5 is introduced into the gap G between the carrying roller 2 and the pressing roller 3 so that the recording medium can be pressed against the carrying roller 2 due to the weight of the pressing roller 3 .
  • the recording medium 5 received in a paper feed tray (not shown) is pressure-contacted with the lower part of the carrying roller 2 so that it can be carried in the direction of an arrow C by the rotation of the carrying roller 2 in its clockwise direction.
  • a thermal transfer printer will now be explained as an example of the printing device P using such a paper carrying mechanism 1 of the present invention. Downstream of the paper carrying mechanism 1 in the direction of the arrow C that the recording medium 5 is carried, are arranged the cylindrical paper feed roller 6 and the pressure-contact roller 7 disposed above the paper feed roller 6 , in the drawing, and pressure-contacted with the paper feed roller 6 with a coil spring (not shown), etc.
  • the recording medium 5 that has been carried in the direction of the arrow C by the rotation of the carrying roller 2 , is pressure-contacted with and gripped between the paper feed roller 6 and the pressure-contact roller 7 .
  • a thermal head 9 is arranged in the printing section 8 above the recording medium 5 that is being carried, and a rotatable platen roller 10 is arranged below the thermal head 9 . Also, the thermal head 9 is movable toward or away from (head-up/head-down) the platen roller 10 .
  • an ink ribbon 11 is drawn between the thermal head 9 and the platen roller 10 .
  • a color ink ribbon on which different kinds of color inks are formed in order is provided on one side of the ink ribbon 11 (for example, lower side in the drawing).
  • the thermal head 9 overprints color inks on the recording medium 5 in order that printing of a color image can be performed.
  • the ink ribbon 11 can be wound in the direction of an arrow E such that one end thereof is wound on a take-up reel (not shown) and the other end thereof is wound on a supply reel (not shown). Further, a pinch roller 12 is arranged on a path along which the ink ribbon 11 is carried.
  • the thermal head 9 is headed up to separate from the platen roller 10 by a predetermined distance so that it is in a standby state before printing.
  • the recording medium 5 carried in the direction of the arrow C by the paper carrying mechanism 1 is pressure-contacted with and gripped between the paper feed roller 6 and the pressure-contact roller 7 , and the recording medium 5 is further carried in the direction of the arrow C between the thermal head 9 in a head-up state and the platen roller 10 by the rotation of the paper feed roller 6 .
  • the recording medium 5 is carried in the direction of the arrow C by a predetermined distance and the rear end 5 b of the recording medium 5 is detected by the paper sensor (not shown), the heading of the recording medium 5 before the start of printing is performed, and the recording medium 5 stops being carried.
  • the thermal head 9 When the heading of the recording medium 5 is performed, the thermal head 9 is headed down and the ink ribbon 11 is pressure-contacted with the recording medium 5 located on the platen roller 10 .
  • heat is selectively generated from a plurality of heat generating elements 9 a of the thermal head 9 on the basis of printing information, and the paper feed roller 6 is rotated in a clockwise direction in the drawing, thereby pulling and feeding back the recording medium 5 in the direction of the arrow D.
  • the rear end 5 b of the recording medium 5 contacts with the carrying roller 2 and the pressing roller 3 .
  • the carrying roller 2 rotates in the same clockwise direction as the feeding direction of a paper. Further, the pressing roller 3 descends in the supporting hole 4 a due to its own weight so that the gap G is formed between the pressing roller 3 and the carrying roller 2 .
  • the rear end 5 b of the recording medium 5 that is being fed back in the direction of the arrow D pushes the pressing roller 3 so that the carrying roller 2 rotates in its clockwise direction.
  • the recording medium 5 that is being fed back in the direction of the arrow D is drawn between the carrying roller 2 and the pressing roller 3 so that it can be further fed back in the direction of the arrow D.
  • the pressing roller 3 descends due to its own weight, the pressing roller 3 can be easily pushed up using the recording medium 5 having contained with a thick paper, such as the printing paper that is being fed back in the direction of the arrow D.
  • cyan color ink of the ink ribbon 13 is thermally transferred onto one side of the recording medium 5 that is being fed back in the direction of the arrow D (the top face in the drawing), thereby performing a first color image printing.
  • a second color image printing is performed by overprinting magenta color ink on the first cyan color image.
  • the recording medium 5 during the color printing is reciprocally carried in a state gripped by the paper feed roller 6 and the pressure-contact roller 7 , and when the printing is performed, the rear end 5 b of the recording medium 5 contacts with the carrying roller 2 and pressing roller 3 of the paper carrying mechanism 1 of the present invention.
  • the pressing roller 3 that descends due to its own weight can be smoothly pushed up by the rear end 5 b of the recording medium 5 .
  • the carrying deviation can be prevented in the recording medium 5 that is being carried, and a high quality image printing having no color deviation can be obtained in color printing.
  • the recording medium 5 onto which printing of a desired color image has been completed, is released from gripping by the paper feed roller 6 and the pressure-contact roller 7 , is fed back in the direction of the arrow D by the carrying roller 2 and the pressing roller 3 , and is discharged to the outside of the printing device P.
  • the recording medium 5 is pressed against the carrying roller 2 due to the weight of the pressing roller 3 , a leaf spring 55 , a small screw 54 , etc., become unnecessary unlike the conventional paper carrying mechanism. As a result, the number of parts and assembly processes can be reduced.
  • color printing has been described an example of printing in the embodiment of the present invention.
  • monochromatic image printing may be performed using the ink ribbon 11 to which monochromatic ink is applied.
  • a thermal transfer printer is used as the recording device P.
  • a thermal printer using a recording medium having a heat-sensitive paper may be used.
  • the pressing roller according to the present invention can be pressed against a recording medium that is being carried between the pressing roller and the carrying roller, due to the weight of the pressing roller, a leaf spring, a small screw, or etc., becomes unnecessary unlike the conventional paper carrying mechanism. As a result, the number of parts and assembly processes can be reduced to provide a paper carrying device capable of reducing the manufacturing cost.
  • a gap smaller than the thickness of a recording medium is formed between the pressing roller and the carrying roller, a recording medium that is being fed back can be smoothly drawn between the carrying roller and the pressing roller so that the pressing roller can be easily pushed up without difficulty.
  • the pressing roller when a recording medium is carried to the gap, the pressing roller is pushed up so that a rotating shaft thereof ascends in an elongated hole, and the recording medium is pressed against the carrying roller due to the weight of the pressing roller. Therefore, the pressing roller can be easily pushed up by the rear end of the recording medium that is being fed back, and the recording medium can be repeatedly and reciprocally carried without the occurrence of carrying deviation.
  • the pressing roller can be easily pushed with a small feedback force of a recording medium, and the recording medium can be easily pressed due to the weight of the pressing roller exerted at the pushed-up states.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electronic Switches (AREA)
  • Handling Of Cut Paper (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US10/882,535 2003-07-07 2004-06-30 Paper carrying mechanism Abandoned US20050017445A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003192724A JP2005029281A (ja) 2003-07-07 2003-07-07 用紙搬送機構
JP2003-192724 2003-07-07

Publications (1)

Publication Number Publication Date
US20050017445A1 true US20050017445A1 (en) 2005-01-27

Family

ID=33447967

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/882,535 Abandoned US20050017445A1 (en) 2003-07-07 2004-06-30 Paper carrying mechanism

Country Status (6)

Country Link
US (1) US20050017445A1 (zh)
EP (1) EP1496001A1 (zh)
JP (1) JP2005029281A (zh)
KR (1) KR20050005793A (zh)
CN (1) CN1321005C (zh)
TW (1) TWI245015B (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091150A1 (en) * 2008-10-10 2010-04-15 Sony Corporation Solid-state imaging device and signal processing system
US11008188B2 (en) 2016-12-19 2021-05-18 Pfu Limited Medium conveying apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101407138B (zh) * 2007-10-10 2010-06-23 诚研科技股份有限公司 物件移动装置
CN111483234A (zh) * 2017-07-19 2020-08-04 浙江惠码科技有限公司 一种基于物联网的防伪二维码打印设备

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674194A (en) * 1968-11-27 1972-07-04 Otto C Strecker K C Drawing press
US3798103A (en) * 1972-02-25 1974-03-19 T Gaunt Laminating incompatible polystyrene and vinyl chloride or acrylic plastic sheets
US3902716A (en) * 1973-10-15 1975-09-02 Mach Controls Company Sheet conveyor roll jam up sensing apparatus
US4558373A (en) * 1984-05-11 1985-12-10 Skantek Corporation Automatic data capture system with special document handling prior to normal scanning
US5496024A (en) * 1993-02-18 1996-03-05 Grapha-Holding Ag Conveying device for transporting printed products along a conveying channel having an upstream end region with adjustable height
US6179495B1 (en) * 1998-06-15 2001-01-30 Noritsu Koki Co., Ltd. Photosensitive material discharging apparatus
US6493016B2 (en) * 2001-03-02 2002-12-10 Fuji Photo Film., Ltd. Image transfer recording apparatus
US20030155706A1 (en) * 2001-12-28 2003-08-21 Fuji Photo Film Co., Ltd. Sheet feeding device and radiation image reading apparatus
US6682069B2 (en) * 2000-11-17 2004-01-27 Fuji Photo Film Co., Ltd. Sheet conveyor system
US6817611B2 (en) * 2002-05-22 2004-11-16 Agfa Corporation Nip mechanism and method of operation thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08259303A (ja) * 1995-03-23 1996-10-08 Mitsubishi Materials Corp ガラス繊維補強石膏板の製造方法

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3674194A (en) * 1968-11-27 1972-07-04 Otto C Strecker K C Drawing press
US3798103A (en) * 1972-02-25 1974-03-19 T Gaunt Laminating incompatible polystyrene and vinyl chloride or acrylic plastic sheets
US3902716A (en) * 1973-10-15 1975-09-02 Mach Controls Company Sheet conveyor roll jam up sensing apparatus
US4558373A (en) * 1984-05-11 1985-12-10 Skantek Corporation Automatic data capture system with special document handling prior to normal scanning
US5496024A (en) * 1993-02-18 1996-03-05 Grapha-Holding Ag Conveying device for transporting printed products along a conveying channel having an upstream end region with adjustable height
US6179495B1 (en) * 1998-06-15 2001-01-30 Noritsu Koki Co., Ltd. Photosensitive material discharging apparatus
US6682069B2 (en) * 2000-11-17 2004-01-27 Fuji Photo Film Co., Ltd. Sheet conveyor system
US6493016B2 (en) * 2001-03-02 2002-12-10 Fuji Photo Film., Ltd. Image transfer recording apparatus
US20030155706A1 (en) * 2001-12-28 2003-08-21 Fuji Photo Film Co., Ltd. Sheet feeding device and radiation image reading apparatus
US6817611B2 (en) * 2002-05-22 2004-11-16 Agfa Corporation Nip mechanism and method of operation thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091150A1 (en) * 2008-10-10 2010-04-15 Sony Corporation Solid-state imaging device and signal processing system
US11008188B2 (en) 2016-12-19 2021-05-18 Pfu Limited Medium conveying apparatus

Also Published As

Publication number Publication date
CN1321005C (zh) 2007-06-13
CN1576038A (zh) 2005-02-09
KR20050005793A (ko) 2005-01-14
TW200524809A (en) 2005-08-01
EP1496001A1 (en) 2005-01-12
TWI245015B (en) 2005-12-11
JP2005029281A (ja) 2005-02-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: ALPS ELECTRIC CO., LTD., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUNAKI, HITOSHI;REEL/FRAME:015546/0293

Effective date: 20040615

STCB Information on status: application discontinuation

Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION