US3637302A - Compact copying machine with multiple-function reciprocating carriage - Google Patents

Compact copying machine with multiple-function reciprocating carriage Download PDF

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Publication number
US3637302A
US3637302A US746127A US3637302DA US3637302A US 3637302 A US3637302 A US 3637302A US 746127 A US746127 A US 746127A US 3637302D A US3637302D A US 3637302DA US 3637302 A US3637302 A US 3637302A
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US
United States
Prior art keywords
carriage
image
copy paper
manuscript
receiving zone
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
US746127A
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English (en)
Inventor
Robert A Hunt
Joseph M Rait
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.)
Pelorex Corp
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Pelorex Corp
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Filing date
Publication date
Application filed by Pelorex Corp filed Critical Pelorex Corp
Application granted granted Critical
Publication of US3637302A publication Critical patent/US3637302A/en
Anticipated expiration legal-status Critical
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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
    • G03G15/22—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20
    • G03G15/28—Apparatus for electrographic processes using a charge pattern involving the combination of more than one step according to groups G03G13/02 - G03G13/20 in which projection is obtained by line scanning
    • 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
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/522—Projection optics
    • G03B27/525—Projection optics for slit exposure
    • G03B27/526—Projection optics for slit exposure in which the projection optics move

Definitions

  • the carriage supports means for feeding copy paper vertically past an image-receiving zone, a mirror which projects an image from the manuscript horizontally toward the image-receiving zone, lens means between the mirror and the image-receiving zone for focusing the image on the surface of the copy paper, a toner receptacle and means for feeding the copy paper therethrough after exposure thereof.
  • Means are provided for moving the carriage horizontally in exact synchronism with vertical movements of the copy paper whereby a panoramic image from the manuscript is applied to the copy paper.
  • the carriage-moving means includes a pulley mounted upon and rotated jointly with a paper feed roll and a traction cable wrapped about the pulley and adapted to be connected to opposite ends of the machine. Means are provided for tightening the cable whereby rotation of the pulley causes the pulley to rotate along the cable and thus move the carriage in synchronism with the paper feed roller.
  • This invention relates to the reproduction of documents and the like by electrophotography and, more particularly, by processes of the type wherein the copy paper is rendered photosensitive by applying an electrostatic charge to the surface of the copy paper.
  • the manuscript to be copied is held in a stationary position and the surface thereof is exposed to optical scanning means which projects an image of the manuscript to an electrostatically sensitized copy sheet.
  • optical scanning means which projects an image of the manuscript to an electrostatically sensitized copy sheet.
  • the present invention provides a relatively simple and compact copying machine wherein the manuscript to be copied is supported face down upon a transparent surface at the top of the apparatus and a carriage passes beneath the same to scan the material of the manuscript.
  • Virtually all of the operating instrumentalities of the copying machine are mounted upon this carriage, that is, a mirror for projecting a scanned image from the manuscript, as the carriage moves in a plane parallel to the surface of the manuscript, lens means for directing this image horizontally to a sheet of sensitized copy paper, means for electrostatically sensitizing the sheet of copy paper, and
  • the principal power-driven feed roll of the paper feed mechanism is driven by electric motor means and the arrangement for propelling the carriage along beneath the manuscript is driven directly from this powered paper feed roll.
  • a pulley connected directly to the powered paper feed roll for rotation therewith has a cable wrapped around the same and the ends of the cable are anchored to opposite ends of the machine. Accordingly, rotation of the paper feed roll and the pulley fixed thereto causes the pulley in effect to roll along the cable.
  • the effective diameter of the pulley and the effective diameter of the paper feed roll are the same.
  • FIG. I is a longitudinal cross-sectional view through one form of the apparatus of the present invention.
  • FIG. 2 is a somewhat schematic skeletonized perspective view of the drive and transmission means of the apparatus of FIG. 1;
  • FIG. 3 is a general top plan view of the apparatus of FIG. 1;
  • FIG. 4 is a fragmentary cross-sectional view taken on the line.44 of FIG. 1;
  • FIG. 5 is a view similar to FIG. 4 but showing fragmentarily the control shaft biasing means of FIG. 4 and taken on the line 5-5 of FIG. 1;
  • FIG. 6 is a fragmentary view similar to FIG. 1 but showing apparatus for applying a dry powdered toner to. the exposed copy paper instead'of the liquid toner contemplated in the apparatus of FIG. 1.
  • the general framework of the machine comprises longitudinal sidewalls l0 and II which are held in fixed spaced relationship by upper and lower end members designated 12 through 15 in FIG. 1; A
  • transparent panel 16 of glass or clear plastic extends across the frame of the machine at the top thereof as shown in FIG. I and the manuscript to be copied is placed face down upon the panel 16.
  • a carriage assembly is designated generally by the reference numeral 17 and is provided with rollers 18 at its four corners for rolling movement in channel tracks 19 which extend horizontally along the interior surfaces of the sidewalls l0 and l l.
  • a series of paper feed rollers are mounted upon carriage l7 and include a pair of upper feed rollers 21 and 22 and a pair of lower feed rollers 23 and 24 which lie directly beneath the upper feed rollers so that the copy paper passes vertically downwardly between the two pairs of rollers.
  • Copy paper is inserted between a pair of spaced copy paper guide plates 27 and 28 which are mounted upon carriage 17 for longitudinal movement therewith.
  • a sheet of copy paper29 is shown inserted between guide plates 27 and 28 for introduction to the upper sides of rollers 21 and 22.
  • roller 24 primarily controls the speed of movement of the paper and, as will be seen later herein, the synchronized horizontal movement of carriage 17. To this end the roller 24 is the primary paper feed roller and is driven at a very slightly faster rate than thecorresponding upper drive roller 22 to insure that the paper is taut in the vertical space between the upper and lower pair of rollers.
  • the copy paper 29 passes through a corona discharge device 31 which sensitizes the paper by applying an electrostatic charge thereto according to copying principles which are common to the Electrofax copying method.
  • a corona discharge device 31 which sensitizes the paper by applying an electrostatic charge thereto according to copying principles which are common to the Electrofax copying method.
  • a mirror 33 disposed at a 45 angle reflects an image of the manuscript 16 through lens means 34 and to the surface of copy paper 29.
  • a lamp 35 also mounted upon carriage 17 illuminates the surface of manuscript 30.
  • a drive motor 45 and reducer unit 46 operate a drive pulley 47 which is connected to pulleys 48 and 49 which are carried by rollers 24 and 40 by a toothed belt 50.
  • a second output pulley SI of the reducer 46 drives a pulley 52 fixed to upper drive roller 22 by means of a belt 53.
  • a pair of pulleys 55 and 56 are fixed to the shaft of paper feed roller 24 for rotation jointly with roller 24 and traction cables 57 and 58 are wrapped around pulleys 55 and 56, respectively.
  • Corresponding ends of the cables 57 and 58 are fixed to the end of the stationary frame portion of the machine, as indicated at 59 and 60 in FIGS. 2 and 3, and the opposite ends of the two cables are attached to a vertical spindle 61 mounted at the opposite end of the machine frame.
  • the cables 57 and 58 are attached to spindle 61 in such manner that clockwise rotation of spindle 61, as viewed from above, tightens cable 58 by wrapping the same around the spindle and loosens cable 57, whereas counterclockwise rotation of spindle 61 tightens cable 57 and loosens cable 58.
  • Pulley 55 and traction cable 57 effect forward operating longitudinal movements of carriage 17, that is, movements from left to right as viewed in FIGS. 1 and 3, whereas pulley 56 and cable 58 effect return movements.
  • Pulley 55 is of such size that its effective diameter with respect to cable 57 is substantially identical with the effective peripheral paper feeding diameter of roller 24. Accordingly, when cable 57 is taut, as during operating strokes of carriage l7, downward movements of copy paper 29 as controlled by rotation of paper feed roll 24 are exactly duplicated by synchronized horizontal movements of carriage 17 which are produced by pulley 55 in effect rolling along cable 57.
  • the energizing circuit for motor 45 includes a normally closed microswitch 64 which is mounted on the stationary framework of the machine and a cam plate 65 fixed to carriage 17 engages and opens microswitch 64 at the end of a return stroke of carriage 17. The parts are shown in this position of rest between operating cycles in FIGS. 1 and 3.
  • a normally open microswitch 66 is fixed to the opposite end of the machine framework as shown in FIGS. 1, 3 and 4, and microswitch 66 is connected in parallel with microswitch 64.
  • the operator rotates spindle 61 in a counterclockwise direction by means of a manipulating knob 67 which brings an operating pin 68, which is fixed to a block 69 carried by spindle 61, into engagement with an operating member 70 of microswitch 66 to close the latter.
  • This establishes an energizing circuit for motor 45 in parallel with microswitch 64 and thus energizes the motor until operator 65 releases microswitch 64 which then closes until the completion of an operating and return cycle of movement.
  • FIG. 6 shows a dry toner arrangement which may be substituted for the wet toner tank 38 of the previous embodiment.
  • FIG. 6 is generally schematic and the paper feed rollers and the corona discharge element are designated by the same numerals as in the previous embodiment. From the lower rollers 23 and 24 the exposed copy paper passes to a table to the bottom of which a tank or reservoir for dry toner, designated 91, is attached.
  • Conventional dry toners usually incorporate iron filings or ferromagnetic powder mixed with resin particles and a magnetic roller 92 picks up this mixture of dry particles, designated 93, and brushes the same against the exposed surface of copy paper 29.
  • the paper is then subjected to heat, as is conventional, by means of a heat-radiating device 94 and a fan 95 may be provided for directing the heat against the surface of the copy paper.
  • a further improvement of the present invention involves the dry toner per se.
  • dry toners as stated above, iron filings and resin particles are mixed and the resin toner particles, being higher in the triboelectric series, acquire a positive charge and the iron particles a negative charge.
  • Dry toners present a problem in maintaining thorough admixture of the iron and resin particles and for maintaining the proper balance or proportion between those particles.
  • the present invention contemplates a novel dry toner wherein the individual ferromagnetic or iron particles are encapsulated with the resin material which comprises the toner per se.
  • the encapsulated iron particles serve their electromagnetic function through the encapsulating'plastic film and the plastic material is applied directly to the electrostatic image on the exposed zinc oxide coated copy paper.
  • the plastic film which is the active toning agent.
  • a stationary support having a horizontal transparent plate adapted to receive manuscript to be copied in facedown position thereon, a carriage mounted for horizontal movement relative to said support beneath said transparent plate to effect linear panoramic scanning of said manuscript, said carriage having an image-receiving zone, roller means mounted on said carriage for feeding copy paper through said carriage past said image-receiving zone, optical means mounted on said carriage for receiving a panoramic image from said manuscript and projecting the same to said imagereceiving zone, means driven directly from said paper feed roller means for moving said carriage horizontally through forward and return strokes inaccurate synchronism with movements of said copy paper the carriage to reproduce an image of said manuscript on said copy paper and return the carriage to initial position means mounted on said carriage adjacent to said image-receiving zone containing electrophotographic toner material, and means for directing said copy paper emerging from said image-receiving zone directly into surface contact with said toner material and for delivering the same from the machine at the conclusion of the return stroke of said carriage.
  • a copying machine according to claim 1 wherein copy paper is fed vertically past said image-receiving zone and wherein said optical means projects said panoramic image horizontally to said vertically moving copy paper at said image-receiving zone.
  • a copying machine according to claim 1 wherein said copy paper feeding roller means is motor driven and wherein said carriage-moving means comprises a drive wheel fixed to said paper feed roller means for rotation therewith.
  • a copying machine according to claim 1 wherein said optical means comprises a mirror positioned to reflect said panoramic image toward said image-receiving zone.
  • a support having a horizontal transparent plate adapted to receive manuscript to be copied in facedown position thereon, a carriage mounted for horizontal movement relative to said support beneath said transparency to effect linear panoramic scanning of said manuscript, roller means for feeding copy paper through said carriage past an image-receiving zone, optical means on said carriage for receiving a panoramic image from said manuscript and projecting the same to said imagereceiving zone, means driven from said paper feed roller means for moving said carriage horizontally in accurate synchronism with movements of said copy paper to reproduce an image of said manuscript on said copy paper, said feed roller comprising a pulley, a traction cable having a portion thereof wrapped around said pulley and its ends extending to opposite ends of said machine, and means for tightening said cable whereby rotation of said pulley causes the pulley to rotate along said cable and thereby move said carriage horizontally in accurate synchronism with said copy paper feed roller.
  • a support having a horizontal transparent plate adapted to receive manuscript to be copied in facedown position thereon, a carriage mounted for horizontal movement relative to said support beneath said transparency to effect linear panoramic scanning of said manuscript, roller means for feeding copy paper'through said carriage past an image-receiving zone, optical means on said carriage for receiving a panoramic image from said manuscript and projecting the same to said imagereceiving zone, means driven from said paper feed roller means for moving said carriage horizontally in accurate synchronism with movements of said copy paper to reproduce an image of said manuscript on said copy paper, said roller means being motor driven and said carriage moving means comprising a drive wheel fixed to said paper feed roller means for rotation therewith, said drive wheel comprising a pulley, a traction cable having a portion thereof wrapped around said pulley and its ends extending to opposite ends of said machine, and means for tightening said cable whereby rotation of said pulley causes the pulley to rotate along said cable and thereby move said carriage horizontally in accurate synchronism with said copy paper
  • a copying machine according to claim 6 wherein copy paper is fed vertically past said image-receiving zone and wherein said optical means projects said panoramic image horizontally to said vertically moving copy paper at said image-receiving zone.
  • a copying machine according to claim 7 wherein copy paper is fed vertically past said image-receiving zone and wherein said optical means projects said panoramic image horizontally to said vertically moving copy paper at said image-receiving zone.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Projection-Type Copiers In General (AREA)
US746127A 1968-07-19 1968-07-19 Compact copying machine with multiple-function reciprocating carriage Expired - Lifetime US3637302A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74612768A 1968-07-19 1968-07-19

Publications (1)

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US3637302A true US3637302A (en) 1972-01-25

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Application Number Title Priority Date Filing Date
US746127A Expired - Lifetime US3637302A (en) 1968-07-19 1968-07-19 Compact copying machine with multiple-function reciprocating carriage

Country Status (7)

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US (1) US3637302A (enrdf_load_stackoverflow)
JP (1) JPS4818498B1 (enrdf_load_stackoverflow)
DE (1) DE1900427A1 (enrdf_load_stackoverflow)
FR (1) FR2013218A1 (enrdf_load_stackoverflow)
GB (1) GB1215409A (enrdf_load_stackoverflow)
NL (1) NL6904707A (enrdf_load_stackoverflow)
SE (1) SE345532B (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3838920A (en) * 1972-04-21 1974-10-01 Hitachi Ltd Electrophotographic copying apparatus
US3848990A (en) * 1972-04-12 1974-11-19 Hitachi Ltd Electrophotographic color copying apparatus
US4589759A (en) * 1984-08-31 1986-05-20 Xerox Corporation Reproducing apparatus with optic scanning module
US4734742A (en) * 1986-11-21 1988-03-29 Eastman Kodak Company Duplex scanner

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS559687U (enrdf_load_stackoverflow) * 1978-07-06 1980-01-22
JPS60176661U (ja) * 1984-05-04 1985-11-22 野田　昌直 写真台
JPS6227060U (enrdf_load_stackoverflow) * 1985-08-02 1987-02-19

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966261A (en) * 1933-01-25 1934-07-10 Folmer Grafiex Corp Photographic mechanism and film magazine used therewith
US3421816A (en) * 1966-04-06 1969-01-14 Addressograph Multigraph Safety arrangement for copying machine
US3451752A (en) * 1966-06-08 1969-06-24 Eastman Kodak Co Compact document copier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966261A (en) * 1933-01-25 1934-07-10 Folmer Grafiex Corp Photographic mechanism and film magazine used therewith
US3421816A (en) * 1966-04-06 1969-01-14 Addressograph Multigraph Safety arrangement for copying machine
US3451752A (en) * 1966-06-08 1969-06-24 Eastman Kodak Co Compact document copier

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848990A (en) * 1972-04-12 1974-11-19 Hitachi Ltd Electrophotographic color copying apparatus
US3838920A (en) * 1972-04-21 1974-10-01 Hitachi Ltd Electrophotographic copying apparatus
US4589759A (en) * 1984-08-31 1986-05-20 Xerox Corporation Reproducing apparatus with optic scanning module
US4734742A (en) * 1986-11-21 1988-03-29 Eastman Kodak Company Duplex scanner

Also Published As

Publication number Publication date
SE345532B (enrdf_load_stackoverflow) 1972-05-29
NL6904707A (enrdf_load_stackoverflow) 1970-01-21
JPS4818498B1 (enrdf_load_stackoverflow) 1973-06-06
DE1900427A1 (de) 1970-01-22
FR2013218A1 (enrdf_load_stackoverflow) 1970-03-27
GB1215409A (en) 1970-12-09

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