US3561868A - Cooling arrangement for a copying machine - Google Patents

Cooling arrangement for a copying machine Download PDF

Info

Publication number
US3561868A
US3561868A US717744A US3561868DA US3561868A US 3561868 A US3561868 A US 3561868A US 717744 A US717744 A US 717744A US 3561868D A US3561868D A US 3561868DA US 3561868 A US3561868 A US 3561868A
Authority
US
United States
Prior art keywords
roller
housing
rollers
air
transparent
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
US717744A
Other languages
English (en)
Inventor
Gerhard Ritzerfeld
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3561868A publication Critical patent/US3561868A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/30—Details adapted to be combined with processing apparatus
    • G03B27/306—Heat development
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L19/00—Duplicating or printing apparatus or machines for office or other commercial purposes, of special types or for particular purposes and not otherwise provided for
    • B41L19/003—Duplicating or printing apparatus or machines for office or other commercial purposes, of special types or for particular purposes and not otherwise provided for using heat, e.g. wax transfer

Definitions

  • the housing is closed, except for an inlet and an outlet for the sheets.
  • Another object of the invention is to provide a copying machine in which cooling air streams flow from the rear part of the housing past the copying rollers and out of suitable openings in the front part of the housing.
  • Another object of the invention is to prevent the overheating of parts of the copying rollers of a copying machine employing a source of infrared radiation.
  • Another object of the invention is to cool a thermo copier in such a manner that the produced copies are of a uniform appearance irrespective of the time during which the copier was in continuous use.
  • the present invention relates to a cooling arrangement for a copying machine, particularly for a thermo copier employing a source of infrared radiation.
  • One embodiment of the invention comprises copying and transporting roller means mounted in a housing to receive and transport sheets inserted through an inlet in the front part of the housing by an operator, and including a transparent roller enveloping a heat-producing source of radiation, and a counterpressure roller.
  • Blower means are located in the rear part of the housing and discharge air 3,561,868 Patented Feb. 9, 1971 forwardly toward and past the roller means transversely to the axes of the same into the front housing part and out of air outlet openings in the same.
  • the streams of air are divided by the roller means and flow forwardly above and below the rollers and cool the same.
  • the front part of the housing and more particularly the front wall, has air outlet openings located at the level of the transparent roller for the passage of air flowing above the same.
  • the bottom portion of the front part has an air outlet for streams of air flowing below the transparent roller and the counter-pressure roller.
  • the cooling air streams are discharged at the front of the housing, where the operator is positioned and supplies the sheets to the machine, the air flows freely along the top and bottom parts of the copying rollers, and particularly of the transparent roller which may consist of glass, so that any overheating in the region of the transparent roller, and particularly at the middle portion of the same is prevented.
  • the air outlet openings in the front wall of the housing are horizontal slots formed between downwardly and forwardly slanted wall portions constructed similar to a Venetian blind.
  • the slanted blind portions block radiation from the source of radiation so that an operator standing in front of the machine is not exposed to the radiation, and does not see the source of radiation. It is also possible to slant the wall portion upward and forward in a position blocking radiation.
  • the slots or other air outlet openings are advantageously covered by a wire mesh or net which permits the passage of air, but partly blocks radiation emitted by the source of radiation.
  • guide means for the inserted sheets are provided, and air outlet openings are disposed in the front part of the housing above and below the guide means so that air streams flow above and below the same, and also above and below the copying rollers.
  • the rear housing portion 17 is connected by pivot means 17a with a front part 19 which can be turned between the illustrated normal position and a higher open position permitting access to the interior of the housing during servicing of the machine.
  • Housing portion 17 has a rear wall formed with a large air inlet opening
  • front part 19 includes a front wall 19a which has downwardly and forwardly slanted wall portions 20 arranged in the manner of Venetian blinds and forming between each other horizontal slots 21 which serve as air outlet openings.
  • the front part of the base portion 5' has also at least one air outlet opening 22, and preferably a plurality of air outlet slots.
  • a drive shaft 1a is mounted in the lateral Walls 6 and carries a drive roller 1 which is in frictional contact with the outer surface of a cylindrical transparent roller 2 which freely rests on a supporting roller 4 and a counterpressure roller 3 whose shafts are mounted in side walls 6.
  • the transparent roller 2 does not have journals, but is supported for rotation and held in its proper position by rollers 1, 3 and 4.
  • a source of infrared radiation 8 is mounted within the transparent roller 2 and provided with a reflector 7 which projects the radiation toward the printing line formed at the bight of rollers 3 and 2. Reflector 7 and infrared lamp 8 may form a unit supported on side 'walls 6.
  • Front wall 19a is spaced from the base portion and forms an inlet 23 for an original or master superimposed on a copy sheet which are inserted byan operator through inlet 23 into a guide channel 9 formed between a higher guide Wall 13 secured to walls 6, and a lower guide wall 14 which rests on the forward edges of the base housing portion 5.
  • the inner ends of guide walls 13 and 14 are spaced from the transporting and copying rollers 2 and 3 and positioned so that guide channel 9 ends in the region of the bight of rollers 2 and 3.
  • Sheets supplied to inlet 23 into the guide channel 9 are gripped by the cooperating rollers 2 and 3 and transported into a guide channel 9a between an upper guide Wall 15 and a lower guide wall 16.
  • Guide wall 16- is secured by a lateral bracket to guide wall 15 which is secured to walls 6.
  • a blower is mounted on bracket 12 on the base portion 5 of the housing, and has a discharge means which blows air transversely to the axes of rollers 2 and 3 in forward direction toward the front part 31 of the housing.
  • a motor 11 mounted on base part 5 drives the shaft of blower 10.
  • Air stream 5 passes through the gap between guide means 15, 16 and rollers 2, 3 toward the top walls of housing portion 17 and of front part 19, and is deflected downward to pass through the slots 21 in front wall 19a while cooling the front surface of transparent roller 2, and also rollers 1 and 4.
  • the lower air stream S flows under the guide wall 14 and out of the outlet slots 22 at the front end of base portion 5.
  • a component of the lower air stream S flows between the ends of guide walls 13, 14 and rollers 3 and 2 into the front part of the housing above guide wall 13 and out of the lower openings 21.
  • Guide Walls 13 and 14, and guide walls and 16, and more particularly the wall portions thereof located adjacent the rollers 2 and 3, are preferably provided with slots or cutouts to permit parts of air streams S and S to flow through the guide means when no sheets are located in the guide channels 9 or 9a.
  • Cooling arrangement for a copying machine comprising, in combination, housing means having an inlet for sheets and an outlet for sheets, a front part having air outlet means, and a rear part having air inlet means; copying and transporting means mounted in said housing means between said inlet for sheets and said outlet for sheets in a position for transporting sheets inserted through said inlet for sheets along a path to said outlet for sheets, said copying and transporting means including a transparent tubular roller having an axis transverse to said path, means for rotating said transparent tubular roller about said axis, and a counterpressure roller having an axis parallel to said axis, and cooperating with said transparent tubular roller for transporting sheets along said path, said counterpressure roller being located rearwardly of said transparent roller; a heat generating source of radiation mounted on said housing means and located in said transparent tubular roller; and blower means located in said rear part of said housing means in the proximity of said air inlet means rearward of said counter pressure roller and transparent roller, and having an air discharge means projecting forwardly and transverse
  • said housing means include first guide means forming said inlet for said sheets and having a first end portion located in front of the bight between said transparent roller and counterpressure roller for supplying sheets to the same, and second guide means having a second end portion rearward of said bight and said outlet for sheets; wherein said air outlet means in said front part include high and low first air outlet openings located above said first guide means for the passage of two airstreams flowing between said rollers and said first and second end portions, respectively, and at least one air outlet opening located below said first guide means so that said upper airstream flows through said high first outlet openings and parts of said lower airstream flow above and below said first guide means, respectively.
  • Cooling arrangement as claimed in claim 1 comprising a reflector in said transparent tubular roller for projecting radiation toward said counterpressure roller.
  • Cooling arrangement as claimed in claim 1 comprising pivot means for mounting said front part of said housing means for movement between a normal closed position and an open servicing position; wherein said air outlet means include a front wall of said front part having at least one outlet opening in the upper portion thereof and at least one outlet opening in the lower portion thereof for at least partly discharging said upper and lower airstreams, respectively.
  • Cooling arrangement as claimed in claim wherein said front wall has slanted wall portions forming between each other a plurality of said outlet openings for air, said slanted wall portions being disposed for blocking rays from said source of radiation and being slanted forward and downward to guide air streams downward on the outside of said front wall.
  • Cooling arrangement as claimed in claim 1 wherein said transparent roller is located forwardly of said counterpressure roller in the upper portion of said front part of said housing means; and wherein said air outlet means include a plurality of air outlet openings in the upper part of said front part located substantially at the level of said transparent roller so that cooling air streams flow along the top part of said transparent roller.
  • said front part of said housing means includes a front wall having a plurality of slanted wall portions forming between each other horizontal air outlet slots which are at least part of said air outlet means, said slanted wall portions being disposed to block radiation from said source.
  • Cooling arrangement as claimed in claim 9 wherein said slanted wall portions are forwardly and downwardly slanted to block radiation from said source and to guide air streams through said slots downward on the outside of said front wall.
  • said air outlet means in said front part include a plurality of first air outlet openings located in the upper portion of said front part substantially at the level of said transparent roller, and at least one second air outlet opening located in the bottom portion of said front part below the level of said transparent roller so that said air streams flow in said front part forwardly above and below said transparent roller.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fixing For Electrophotography (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
US717744A 1967-04-07 1968-04-01 Cooling arrangement for a copying machine Expired - Lifetime US3561868A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER0045703 1967-04-07

Publications (1)

Publication Number Publication Date
US3561868A true US3561868A (en) 1971-02-09

Family

ID=7407730

Family Applications (1)

Application Number Title Priority Date Filing Date
US717744A Expired - Lifetime US3561868A (en) 1967-04-07 1968-04-01 Cooling arrangement for a copying machine

Country Status (7)

Country Link
US (1) US3561868A (de)
AT (1) AT283117B (de)
CH (1) CH477985A (de)
DE (1) DE1572298A1 (de)
ES (1) ES351079A1 (de)
FR (1) FR1560778A (de)
GB (1) GB1190533A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712735A (en) * 1970-09-25 1973-01-23 Amp Inc Apparatus for photo etching
US3993124A (en) * 1971-12-30 1976-11-23 Xerox Corporation Method and apparatus for fuser assembly cooling in an electrostatographic machine
US4695151A (en) * 1984-10-26 1987-09-22 Kabushiki Kaisha Toshiba Image forming apparatus

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712735A (en) * 1970-09-25 1973-01-23 Amp Inc Apparatus for photo etching
US3993124A (en) * 1971-12-30 1976-11-23 Xerox Corporation Method and apparatus for fuser assembly cooling in an electrostatographic machine
US4082137A (en) * 1971-12-30 1978-04-04 Xerox Corporation Method and apparatus for fuser assembly cooling in an electrostatographic machine
US4085794A (en) * 1971-12-30 1978-04-25 Xerox Corporation Method and apparatus for fuser assembly cooling in an electrostatographic machine
US4695151A (en) * 1984-10-26 1987-09-22 Kabushiki Kaisha Toshiba Image forming apparatus

Also Published As

Publication number Publication date
CH477985A (de) 1969-09-15
DE1572298A1 (de) 1970-02-19
GB1190533A (en) 1970-05-06
ES351079A1 (es) 1969-05-16
AT283117B (de) 1970-07-27
FR1560778A (de) 1969-03-21

Similar Documents

Publication Publication Date Title
TW365580B (en) Thermal printer, thermal printing method and conveyor for recording material
US6714229B2 (en) Image forming apparatus
US4384783A (en) Fixing device for wet-type electrophotographic copying machines
US3561868A (en) Cooling arrangement for a copying machine
DE1797639B2 (de) Luftführung bei einem mit fortschreitender stufenweiser Projektion arbeitenden Kopiergerät
US3219794A (en) Thermographic dry copying machine
US1742372A (en) Photographic-printing apparatus
JP4842798B2 (ja) Ｕｖ定着装置
US3762814A (en) Air cooled light projection unit
US3280717A (en) Photographic developing machines
US2308130A (en) Reproducing apparatus for light sensitive reproduction media
US3501635A (en) Portable thermographic copying machine with photoelectric means to activate the heat lamp thereof upon insertion of a specimen into the machine
US2979986A (en) Picture projecting device
US910832A (en) Blue-printing machine.
US1716322A (en) Air-cooling mechanism for projecting machines
US3117489A (en) Image projector with air circulating means
US3583805A (en) Device for drying and fixing in electronic photocopying machine
US2467241A (en) Conveyer system for drum-type photoprinter
US3762812A (en) Copy machine cooling and drying system
US4176949A (en) Microfiche exposer
US3660911A (en) Film drying device
US3517997A (en) Document feeding and exposure means for an office copier
US3897149A (en) Photographic exposure apparatus
US3523726A (en) Xerographic copying device
KR102099541B1 (ko) 인쇄기용 경화 장치