US3894801A - Apparatus for copying different size documents in a copying machine - Google Patents

Apparatus for copying different size documents in a copying machine Download PDF

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Publication number
US3894801A
US3894801A US434183A US43418374A US3894801A US 3894801 A US3894801 A US 3894801A US 434183 A US434183 A US 434183A US 43418374 A US43418374 A US 43418374A US 3894801 A US3894801 A US 3894801A
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United States
Prior art keywords
scanning
clutch
sized
timing
document
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Expired - Lifetime
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US434183A
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English (en)
Inventor
Yoshiharu Namba
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Fujifilm Business Innovation Corp
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Fuji Xerox Co Ltd
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    • 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

  • ABSTRACT Apparatus for driving the illumination exposure system of a copying machine where the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed,
  • variable, cyclic timing means for determining (l) a first timing cycle required for the scanning means to scan a first sized document and for the scanning means to be returned to its start position and (2) a second timing cycle required for the scanning means to scan a second sized document smaller than the first sized document and for the scanning means to be returned to its start position, the timing.
  • driving means responsive to the timing means for driving the scanning means to scan the stationary document; settable control means for controlling the length of time the driving means is responsive to the timing means so that (1) with a first setting of the settable control means the scanning means scans substantially only the length of the first sized document and is then returned to its starting position and (2) with a second setting thereof the scanning means scans substantially only the length of the second sized document and then is returned to its starting position; second control means responsive to the second setting of the settable control means, the second control means being actuated when scanning of the second sized document is complete to decrease the time it takes for the timing means to complete its timing cycle so that the timing cycle for the second sized document is shorter than that for the first sized document whereby the number of second sized documents that may be copied per unit time is less than that of the larger, first sized documents.
  • FIG. 1 is a schematic diagram of an illustrative copying machine in which the apparatus of this invention is useful.
  • FIG. 2 is a perspective view of an illustrative illumination exposure system for use in this invention.
  • FIG. 3 is a perspective view of an illustrative embodiment of this invention which comprises apparatus for actuating the illumination exposure system of FIG. 2.
  • FIG. 4 is a cross-sectional view of an illustrative spring clutch for use with this invention.
  • FIG. 5 is a perspective schematic diagram of an illustrative driving mechanism for a driving gear of FIG. 3.
  • FIG. 1 is a schematic diagram of an illustrative copying machine in which the apparatus of this invention is useful.
  • An illumination exposure system 1 a magnetic brush developer 2, a blade cleaner 3, a fuser 4, a toner dispenser 5, a pivot cassette tray 6, a paper transport 7, a power supply 8, a charging corotron 9, a pretransfer corotron 10, a transfer corotron 11, a further corotron 12, a preclean corotron 13, a feeder roll 14, and a snap gate are shown and conventionally utilized.
  • the above-mentioned illumination exposure system 1 is conventional and may be as shown in FIG. 2 where carriages l6 and 19, a lamp l7, mirrors 18, 19a, and 20, and lens mirror 21 are shown.
  • Mirror carriages 16 and 19 scan a stationary document reciprocatively in response to rotation of scanning shaft 22 via pulley 23 and wire 24.
  • a return spring 22a is provided to return carriage l6 and 19 to start position after each scan is completed.
  • the apparatus of this invention which drives scanning shaft 22 may be as shown in FIG. 3 where'a driving gear 25, an input gear 26 engaged with driving gear 25,
  • a spring clutch 28 selectively links input gear 26 with main shaft 27 to rotate the shaft in one direction only.
  • Spring clutch 28 does not transmit rotation to shaft 27 unless solenoid 34, connected thereto, is excited.
  • Solenoid 34 may be excited by an electrical signal such as an electrical pulse and when it is excited, its magnet bar is withdrawn into the core of the solenoid whereupon a pawl 33 connected to the bar is withdrawn from a lobe 31a provided on spring clutch 28.
  • Lobe 31a has no hitch or catch on its back side so that with one excitation of solenoid 34, the spring clutch 28 turns 360 until it is stopped by the release pawl 33. In other words, the spring clutch 28 can transmit rotation to shaft 27 only when pawl 33 is not holding lobe 31a.
  • Spring clutch 28 may comprise, as shown in FIGS. 3 and 4, an output side sleeve 30 secured to main shaft 27, the input gear 26 being rotatably engaged with sleeve 30.
  • a stop collar 31 from the periphery of which protrudes allobe 31a, encircles bosses 26a and 30a of gear 26 and sleeve 30, respectively, as shown in FIG. 4.
  • a wrap spring 32 one end of which is attached to the output side sleeve 30 and the other end of which loosely touches stop collar 31, is interposed between the aforementioned boss and stop collar 31. Wrap spring 32 is wound in a direction opposite to the rotation of input gear 26.
  • input gear 26 engages, via an idler gear 35, a gear 37 fastened to a counter shaft 36.
  • An electromagnetic clutch 38 is provided on counter shaft 36. On the output side of clutch 38 is fastened a gear 39.
  • the gear 39 via an idler gear 40 engages a gear 41 fastened to main shaft 27.
  • the gear ratio of the gear 39 to the gear 41 is such as to increase the speed of the main shaft 27 driven by driving gear 25 and input gear 26, by a determined number of revolutions per unit time.
  • a collar 42 is attached to main shaft 27.
  • a pulley 43 is rotatably fitted to main shaft 27 adjacent to collar 42.
  • a wire or belt 45 is run between pulley 43 and the pulley 44 fastened to the scanning shaft 22 of the illumination exposure system 1, see FIG. 2.
  • the scanning shaft 22 is rotated as pulley 43 on main shaft 27 is rotated.
  • a notch 46 On the periphery of collar 42 is provided a notch 46.
  • a pawl member 47 releasably engages notch 46.
  • Pawl 47 is provided on pulley 43 in such a manner that the pawl is released upon contact with a release lever 48, the fixed position of which can be varied depending on the size of the manuscript being copied. Because of collar 42 and pawl member 47, the rotation of main shaft 27 can be intermittently transmitted to pulley 43.
  • Drive gear 25 is driven by a motor 50 through a chain 49 run through a plurality of idler pulleys, as shown in FIG. 5.
  • solenoid 34 is energized to turn on spring clutch 28, electromagnetic clutch 38 being turned off at this time.
  • the rotation of the input gear 26, driven by the drive gear 25, is transmitted to main shaft 27 via spring clutch 28.
  • the rotation of main shaft 27 is transmitted to scanning shaft 22 through collar 42, pawl 47, pulley 43, wire or belt 45 and pulley 44.
  • gear 39 of counter shaft 36 also rotates due to the rotation of main shaft 27. But since electromagnetic clutch 38 is in the off state, gear 39 runs idle.
  • release lever 48 which is set at a position of 32503' after the start of scanning, causes collar 42 to disengage from pawl 47. While carriages l6 and 19 are being returned to the start position, the output side of spring clutch 28 continues its rotation until it has rotated once that is, 360at which time the output side of spring clutch 28 is hooked at lobe 31a and stops. At this time, return of carriages 16 and 19 to the start position has just been completed.
  • this may be simply effected by positioning a microswitch to respond to the release of pawl 47 from collar 42 to thereby generate a trigger pulse for actuating a single shot multivibrator, the output pulse of which is applied to clutch 38.
  • the pulse width may be appropriately controlled to insure that clutch 38 is turned off before the output side of spring clutch 28 reaches 360. Due to the actuation of clutch 38, the rotation of counter shaft 36 is transmitted to gear 39 viaelectromagnetic clutch 38 and then transmitted to main shaft 27 via gear 39.
  • the number of revolutions per unit time transmitted from counter shaft 36 is higher by a predetermined number than the number of revolutions per unit time transmitted from driving gear 25 through input gear 26 and spring clutch 28. Hence, the number of revolutions per unit time on the output side of spring clutch 28 starts to correspondingly increase simultaneously with completion of scanning of the A 4 sized manuscript.
  • the output side of spring clutch 28, when scanning is completeof a B 4 sized paper, is at a position 32503 from the start of scanning, as mentioned above; whereas the output side of spring clutch 28, when scanning is complete of a A 4 sized paper, will be at a position of 27151' from the starting position. Due to the increased speed of main shaft 27, the output side of spring clutch 28 is accelerated to the 360 position; the time required for the rotation from 2715l' to 360 when copying A 4 sized paper is typically nearly equal to the time required for the rotation from 32503' to 360 when copying B 4 sized paper.
  • spring clutch 28 is turned off and assumes stand-by for the next scanning operation.
  • appropriate means such as a bias spring connected between pawl 47 and pulley 43 for again engaging pawl 47 with co]- lar 42 at the end of the timing cycle of spring clutch 28 are provided.
  • an amplification means containing a clutch 38 which is normally off is interposed between the input side and the output side of the spring clutch 28, and clutch 38 is so connected as to accelerate the rotation of the output side of spring clutch 28 relative to the input side thereof.
  • Apparatus for driving the illumination exposure system of a copying machine where the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, said apparatus comprising:
  • variable, cyclic timing means for determining (l) a first timing cycle required for said scanning means to scan a first sized document and for said scanning means to be returned to its start position and (2) a second timing cycle required for said scanning means to scan a second sized document smaller than said first sized document and for said scanning means to be returned to its start position, said timing means being responsive to a control signal for initiating each timing cycle to thereby initiate scanning by said scanning means and said timing means being nonresponsive to further control signals'until each timing cycle is complete, said variable'cyclic timing means comprising (a) a spring cutch, the input side of which is connected to a source of rotative power and the output side of which is removably connected to said driving means via said main shaft, and (b) a first control source for actuating said spring clutch to connect the input and output sides thereof, said spring clutch including means for disconnecting said input and output sides thereof after said output side has been rotated through a p'redetermined angle;
  • driving means mounted on a main shaft responsive to said timing means for driving said scanning means to scan said stationary document;
  • settable control means for controlling the length of time said driving means is responsive to said timing means so that (l) with a first setting of said settable control means said scanning means scans substantially only. the length of said first sized document and is then returned to its starting position and (2) with a second setting thereof said scanning means scans substantially only the length of said second sized document and then is returned to its starting position;
  • I 1 i second control means responsive tosaid second setting of said settable control means, said second controlrmeans being actuated when scanning of said second sized document is complete to decrease the time it takes for said timing means to complete its timing cycle so that the timing cyclefor said second sized document is shorter than that for said first sized document
  • said second control means comprising a second clutch, the input side of which is responsive to said source of rotative power and the output side of which is connected via a speed multiplying means to said main shaft, said speed multiplying means causing the rotational .speed imparted to said main shaft from the output side of said second clutch to be greater than that imparted there
  • said drivingv means includes (a) a drive pulley rotatably mounted on a main shaft connected to said output side of the spring clutch, said pulley being connected to said scanning means, (b) a notched collar fixedly mounted on said main shaft, and (c) a pawl rotatably mounted on said pulley, said pawl releasably engaging said notched collar so that the rotation of said output side of said spring clutch is transmitted via said main shaft, said collar, said pawl and said pulley to said scanning means for effecting scanning of said stationary document.
  • said settable control means comprises a lever which is fixedly positionable in (a) a first lever position so that said lever causes said pawl to be released from the notched collar when said first sized document has been scanned and (b) a second lever position so that said lever causes said pawl to be released from the notched collar when said second sized document has been scanned.
  • Apparatus for driving the illumination exposure system of a copying machine where the illumination exposure system includes means for scanning a stationary document in a first direction and returning the scanning means in the opposite direction to a start position after scanning has been completed, said apparatus comprising:
  • a spring clutch the input side of which is connected to a source of rotative power and the output side of which is connected to a main shaft;
  • a first control signal source for actuating said spring clutch to connect the input and output sides thereof, said spring clutch including means for disconnecting said input and output sides thereof after said output side has been rotated through a predetermined angle;
  • a pawl rotatably mounted on said pulley, said pawl releasably engaging said notched collar so that the rotation of said output side of said spring clutch is transmitted via said main shaft, said collar, said pawl and said pulley to said scanning means for effecting scanning of said stationary document;
  • a lever which is fixedly positionable in (a) a first lever position so that said lever causes said pawl to be released from the notched collar when a first sized document has been scanned and (b) a second lever position so that said lever causes said pawl to be released from the notched collar .when a second sized document has been scanned;
  • a second clutch the input side of which is connected to said source to rotative power and the output side of which is connected via a gear train to said main shaft, said gear train causing the rotational speed imparted to said main shaft from the output side of.
  • said second clutch to be greater than that imparted thereto by said spring clutch where the difference in speed is absorbed in the spring of said spring clutch, said second clutch being actuated by a second control signal source which actuates said second clutch in response to said lever releasing said pawl from said notched collar when said second sized document has been scanned to thereby accelerate the rotation of the output said of said spring clutch through its said predetermined angle of rotasaid start position, said second clutch being de-' actuated approximately just before said output side has been rotated through said predetermined angle whereby the number of said second sized documents that may be copied per unit time is greater than that of said larger, first sized documents.
  • Apparatus for driving the illumination exposure system of a copying machine where the illumination exposure system includes means for scanning a stationary document in a first direction and means for returning the scanning means in the opposite direction to a start position after scanning has been completed, said apparatus comprising:
  • variable, cyclic timing means for determine (1) a first timing cycle required for said scanning means to scan a first sized document and for said scanning means to be returned to its start position and (2) a second timing cycle required for said scanning means to scan a second sized document smaller than said first sized document and for said scanning means to be returned to its start position, said timing means being responsive to a control signal for initiating each timing cycle to thereby initiate scanning by said scanning means and said timing means being non-responsive to further control signals until each timing cycle is complete, said variable cyclic timing means comprising (a) a spring clutch, the input side of which is connected to a source of rotative power and the output side of which is removably connected to said driving means and (b) a first control signal source for actuating said spring clutch to connect theinput and output sides thereof, said spring clutch including means for disconnecting said input and output sides thereof after said output side has been rotated through a predetermined angle;
  • driving means responsive to said timing means for driving said scanning means to scan said stationary document
  • said driving means including (a) a drive pulley rotatably mounted on a main shaft connected to said output side of the spring clutch, said pulley being connected to said scanning means, (b) a notched collar fixedly mounted on said main shaft, and (c) a pawl rotatably mounted on said pulley, said pawl releasably engaging said notched collar so that the rotation of said output side of said spring clutch is transmitted via said main shaft, said collar, said pawl and said pulley to said scanning means for effecting scanning of said stationary document;
  • settable control means for controlling the length of time said driving means is responsive to said timing means so that (1 )with a first setting of said settable control means said scanning means scans substantially only the length of said first sized document and is then returned to its starting position and (2) with a second setting thereof said scanning means scans substantially only the length of said second sized document and then returned to its starting position, said settable control means comprising a lever which is fixedly positionable in (a) a first lever position so that said lever causes said pawl to be released from the notched collar when said first sized document has been scanned and (b) a second lever position so that said lever causes said pawl to be released from the notched collar when said second sized document has been scanned,
  • said second control means responsive to said second setting of said settable control means, said second control means being actuated when scanning of said second sized document is complete to decrease the time it takes for said timing means to complete its timing cycle so that the timing cycle for said second sized document is shorter than that for said first sized document
  • said second control means comprising a second clutch, the input side of which is connected to said source of rotative power and the output side of which is connected via a gear train to said main shaft, said gear train causing the rotational speed imparted to said main shaft from the output side of said second clutch to be greater than that imparted thereto by said spring 7 just before said output side has been rotated through said predetermined angle; whereby the number of said second sized documents that may be copied per unit time is greater than that of said larger first sized documents,

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Mechanical Operated Clutches (AREA)
  • Transmission Devices (AREA)
US434183A 1973-01-27 1974-01-17 Apparatus for copying different size documents in a copying machine Expired - Lifetime US3894801A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1069073A JPS573067B2 (fr) 1973-01-27 1973-01-27

Publications (1)

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US3894801A true US3894801A (en) 1975-07-15

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US434183A Expired - Lifetime US3894801A (en) 1973-01-27 1974-01-17 Apparatus for copying different size documents in a copying machine

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US (1) US3894801A (fr)
JP (1) JPS573067B2 (fr)
DE (1) DE2403271B2 (fr)
GB (1) GB1444312A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989369A (en) * 1975-01-10 1976-11-02 Rank Xerox, Ltd. Scanning mechanism for a copying apparatus
US4095880A (en) * 1975-06-27 1978-06-20 Xerox Corporation Extended range variable magnification reproduction machine
FR2446245A1 (fr) * 1979-01-11 1980-08-08 Savin Corp Appareil comprenant une machine de reproduction et une interclasseuse
US6700246B1 (en) * 1999-11-05 2004-03-02 Valeo Auto-Electric Wischer Und Motoren Gmbh Tubutor motor

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53129639A (en) * 1977-04-19 1978-11-11 Mita Industrial Co Ltd Method of and device for electrostatic copying
CA1114354A (fr) * 1977-06-10 1981-12-15 Steven K. Harbaugh Table optique a translation de precision
JPH07376Y2 (ja) * 1989-05-22 1995-01-11 株式会社豊田自動織機製作所 リザーブタンクの保持装置
CN101393408B (zh) * 2007-09-17 2010-12-08 美商新采国际股份有限公司 离合器控制装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062095A (en) * 1959-07-02 1962-11-06 Xerox Corp Projector optical scanning system
US3554640A (en) * 1968-11-25 1971-01-12 Ibm Drive coupling system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3062095A (en) * 1959-07-02 1962-11-06 Xerox Corp Projector optical scanning system
US3554640A (en) * 1968-11-25 1971-01-12 Ibm Drive coupling system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3989369A (en) * 1975-01-10 1976-11-02 Rank Xerox, Ltd. Scanning mechanism for a copying apparatus
US4095880A (en) * 1975-06-27 1978-06-20 Xerox Corporation Extended range variable magnification reproduction machine
FR2446245A1 (fr) * 1979-01-11 1980-08-08 Savin Corp Appareil comprenant une machine de reproduction et une interclasseuse
US6700246B1 (en) * 1999-11-05 2004-03-02 Valeo Auto-Electric Wischer Und Motoren Gmbh Tubutor motor

Also Published As

Publication number Publication date
JPS4999035A (fr) 1974-09-19
DE2403271A1 (de) 1974-08-01
DE2403271B2 (de) 1980-01-31
GB1444312A (en) 1976-07-28
JPS573067B2 (fr) 1982-01-20

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