US3608894A - Original feeding device for photocopying machine - Google Patents

Original feeding device for photocopying machine Download PDF

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Publication number
US3608894A
US3608894A US803711A US3608894DA US3608894A US 3608894 A US3608894 A US 3608894A US 803711 A US803711 A US 803711A US 3608894D A US3608894D A US 3608894DA US 3608894 A US3608894 A US 3608894A
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US
United States
Prior art keywords
shaft
original
rollers
shafts
feed
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
US803711A
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English (en)
Inventor
Kenzo Ariyama
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Application granted granted Critical
Publication of US3608894A publication Critical patent/US3608894A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G03B27/62—Holders for the original
    • G03B27/6207—Holders for the original in copying cameras
    • G03B27/625—Apparatus which relate to the handling of originals, e.g. presence detectors, inverters

Definitions

  • the present invention relates to a photocopying machine or the like and more particularly an original feeding device therefore.
  • Originals used in photocopying are various. Some are new and the others are old. Some have folds, creases, etc., and have a tendency to curl, and the others are folded completely into cylindrical form.
  • an original feeding device of the type in which in order to feed the original into the machine in the correctly extended state, resilient rollers are provided in the inlet of the machine so as to rotate these rollers in the same direction with the original feed direction. This device is very effective only when the leading edges of the original have folds or a tendency to curl so that the leading edge can be corrected.
  • one of the primary objects of the IN- VENTION invention is to provide a novel original feeding device which can overcome the above described defects for use with a photocopying machine.
  • the present invention provides a plurality of resilient rollers which rotate in the same direction with that of the original feed direction when the original is inserted and which are reversed to rotate in the direction opposite to the first mentioned direction when the original has been advanced beyond the rollers by a predetermined distance, thereby preventing these rollers from winding the trailing edge of the original.
  • a switch adapted to be actuated by the leading side edge of the original is provided so that upon actuation of this switch, an electromagnetic plunger is energized, thereby displacing or lifting a common shaft carrying the resilient rollers from its initial position. Therefore, the driving coupling between the common shaft and a drive shaft, which drives the common shaft, is reversed (so that the resilient rollers are rotated in the direction opposite to the first direction). Displacing or lifting the common shaft as described above serves to prevent the resilient rollers from imparting too much strong force to the original being fed.
  • FIG. I is a perspective view of an original feeding device of the present invention.
  • FIG. 2 is a side view thereof
  • FIG. 3 is a schematic view illustrating a driving coupling device between a drive shaft and a common shaft carrying a resilient roller according to the present invention.
  • FIGS. 4 and 5 are explanatory views illustrating two different states of driving coupling system thereof.
  • a paper feeder plate 1 is a disposed forwardly of a copying section or station of a photocopying machine, and a guide plate 2 is depending toward the feed plate I and bent at a position slightly above the feed plate I inwardly so as to define a narrow paper-feeding space 3 between the guide plate 2 and the feeder plate 1.
  • a drive shaft 4 and a printer belt 5 lapped over the drive shaft 4.
  • the tension side of the printing belt 5 is positioned substantially at the same level with that of the feed plate surface and is in parallel with the forwardly, that is horizontally extending portion of the guide plate 2 so as to define a narrow space therebetween.
  • the printing belt 5 is driven by the drive shaft 4 in the direction indicated by the arrow.
  • each of the resilient rollers 8 extends slightly beyond the surface of the guide plate 2 so as to contact directly with an original passing over the space between the feeder plate and the guide plate 2.
  • the resilient roller 8 is preferably made of brush, rubber, sponge or resilient synthetic resin such as foamed polyu rethane.
  • Reference numerals 6 and 6a denote the original and a copying paper respectively.
  • Reference numeral 12 designates a microswitch for reversing the direction of rotation of the resilient roller 8, the function of which will be described in more detail hereinafter.
  • the drive shaft 4 and the common shaft 9 are drivingly coupled to each other through friction wheels Ill and 10 carried by the drive and common shafts respectively.
  • the common shaft 9 is supported by the friction wheel 11 of the drive shaft 4 through the friction wheel 10 and applies to the friction wheel the weight of the common shaft 9.
  • the resilient rollers 8 are rotated in the same direction with that of the paper feed direction as indicated by the arrow.
  • an electromagnetic plunger I3 which is controlled by the microswitch l2 and a switch I7.
  • At common ends of the drive and common shafts 4 and 9 are formed enlarged diameter portions 14 and 15 which serve as pulleys for a belt 16.
  • the superposed original and copying paper are inserted into the photocopying machine through the inlet thereof.
  • the leading edge having a tendency to curl as shown in FIG. 2 can be straightened by the rollers 8 rotating in the direction indicated by the solid line arrow in FIG. 2, as the original passes below the rollers 8.
  • the superposed original and copying paper actuate the microswitch 12, thereby energizing this switch. Therefore, the electromagnetic plunger 13 is actuated so that the common shaft 9 is moved upwardly.
  • This plunger is shown as being disposed only at one end of the common shaft in FIG. 3, but, if required, at both ends of the common shaft are provided such plungers.
  • the belt 16' is tensioned so that the drive and common shafts 4 and 9 are drivingly coupled with each other through the belt 16 this time. Therefore, the common shaft 9 and consequently the rollers 8 are caused to rotate in the reverse direction.
  • the trailing edge having a tendency to curl in the original 6 is corrected or straightened by the rollers 8 which are rotating in the direction indicated by the broken line arrow while the original is advanced forward.
  • an O-ring, a spring ring or the like may be used.
  • the switch 17 is provided for interrupting the operation of the device or deenergizing the device when not used.
  • the salient advantages accrued from the present invention are that any damage to the original and the malphotocopying can be prevented; since it is not necessary any longer to hold the original so as to correct the folded or curled portion thereof when advanced toward the copying section or station, next preparatory operation may be made during photocopying, thereby reducing the time required for photocopying and improving remarkedly the efficiency; and since the original can be advanced toward the copying station in the correctly extended and superposed state without any curl, folds, creases and so on which will inevitably cause poor and unusable copies, the operator is much relieved from the mental fatigue experienced in the conventional photocopying machine.
  • Feeding device for superposed original and copying paper unit in a photocopying machine comprising:
  • a guide plate positioned above said feed plate and having a horizontal part defining with said guide plate a feed inlet
  • said connecting means comprising a pair of directly connectable rotary elements, each rotary element being fixedly mounted respectively on one of said shafts, and said elements having peripheral contact for frictional rotation together when said superposed unit is initially fed into said inlet thereby driving said rollers with their lower peripheries moving in the feed direction;
  • detecting means located a predetermined distance downstream of said resilient rollers and adapted to be operated by a leading edge of said superposed unit;
  • said connecting means further comprising an endless belt looped around said first and second shafts, said belt positioned in slack position when said elements are connected together for frictional rotation and;
  • moving means actuated by operation of said detecting means to move said shafts further apart thereby separating said rotary elements and simultaneously tightening said belt to drive said first shaft and resilient rollers so that their lower peripheries move reverse to the feed direction to connect a trailing edge of said superposed unit.
  • Feeding device in which said detecting means comprises an electrical switch, and said moving means comprises an electromagnetic plunger actuated by said switch to lift said first shaft to separate said rotary elements.
  • Feeding device in which a pair of pul ley portions are respectively formed on said first and second shafts, and said belt is looped around said pulley portions to slidable thereon when said rotary elements are frictionally engaged.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
US803711A 1968-03-06 1969-03-03 Original feeding device for photocopying machine Expired - Lifetime US3608894A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP43014052A JPS502579B1 (enrdf_load_stackoverflow) 1968-03-06 1968-03-06

Publications (1)

Publication Number Publication Date
US3608894A true US3608894A (en) 1971-09-28

Family

ID=11850307

Family Applications (1)

Application Number Title Priority Date Filing Date
US803711A Expired - Lifetime US3608894A (en) 1968-03-06 1969-03-03 Original feeding device for photocopying machine

Country Status (5)

Country Link
US (1) US3608894A (enrdf_load_stackoverflow)
JP (1) JPS502579B1 (enrdf_load_stackoverflow)
DE (1) DE1911512A1 (enrdf_load_stackoverflow)
GB (1) GB1265495A (enrdf_load_stackoverflow)
NL (1) NL163331C (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833214A (en) * 1973-04-11 1974-09-03 Addressograph Multigraph Sheet feeding apparatus for copy machine
US4579334A (en) * 1983-11-21 1986-04-01 Ncr Corporation Apparatus for indicating the status of sheets
US4729556A (en) * 1985-02-18 1988-03-08 Laurel Bank Machines Co., Ltd. Apparatus for detecting the thickness of bank note

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US584073A (en) * 1897-06-08 Paper-feeding machine
US3108801A (en) * 1960-06-28 1963-10-29 Nederlanden Staat Device for conducting postal articles, forms or the like
US3202144A (en) * 1963-05-17 1965-08-24 Int Harvester Co Fan reversing
US3279787A (en) * 1964-06-22 1966-10-18 Frederick Post Co Sheet-feeding method and apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US584073A (en) * 1897-06-08 Paper-feeding machine
US3108801A (en) * 1960-06-28 1963-10-29 Nederlanden Staat Device for conducting postal articles, forms or the like
US3202144A (en) * 1963-05-17 1965-08-24 Int Harvester Co Fan reversing
US3279787A (en) * 1964-06-22 1966-10-18 Frederick Post Co Sheet-feeding method and apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833214A (en) * 1973-04-11 1974-09-03 Addressograph Multigraph Sheet feeding apparatus for copy machine
US4579334A (en) * 1983-11-21 1986-04-01 Ncr Corporation Apparatus for indicating the status of sheets
US4729556A (en) * 1985-02-18 1988-03-08 Laurel Bank Machines Co., Ltd. Apparatus for detecting the thickness of bank note

Also Published As

Publication number Publication date
DE1911512A1 (de) 1969-12-18
GB1265495A (enrdf_load_stackoverflow) 1972-03-01
NL163331C (nl) 1980-08-15
NL6903467A (enrdf_load_stackoverflow) 1969-09-09
NL163331B (nl) 1980-03-17
JPS502579B1 (enrdf_load_stackoverflow) 1975-01-28

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