US3599972A - Paper tray for photocopy machine - Google Patents

Paper tray for photocopy machine Download PDF

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Publication number
US3599972A
US3599972A US844094A US3599972DA US3599972A US 3599972 A US3599972 A US 3599972A US 844094 A US844094 A US 844094A US 3599972D A US3599972D A US 3599972DA US 3599972 A US3599972 A US 3599972A
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United States
Prior art keywords
tray
stack
sheet
feed rollers
apparatus defined
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
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US844094A
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English (en)
Inventor
Joseph F Miciukiewicz
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.)
Pitney Bowes Inc
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Pitney Bowes Inc
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Publication date
Application filed by Pitney Bowes Inc filed Critical Pitney Bowes Inc
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/26—Supports or magazines for piles from which articles are to be separated with auxiliary supports to facilitate introduction or renewal of the pile
    • B65H1/266—Support fully or partially removable from the handling machine, e.g. cassette, drawer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/04—Supports or magazines for piles from which articles are to be separated adapted to support articles substantially horizontally, e.g. for separation from top of pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H1/00—Supports or magazines for piles from which articles are to be separated
    • B65H1/08—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device
    • B65H1/12—Supports or magazines for piles from which articles are to be separated with means for advancing the articles to present the articles to the separating device comprising spring
    • 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
    • G03G15/65—Apparatus which relate to the handling of copy material
    • G03G15/6502—Supplying of sheet copy material; Cassettes therefor

Definitions

  • the rearward end of the tray is biased downwardly to pivot the tray about a fulcrum, urging the forward end up- I wardly to maintain the uppermost sheet of the stack in feeding engagement with the feed rollers.
  • a latch releasably retains the tray with its forward end spaced from the feed rollers and sheet separator-edge alignment elements elevated to facilitate loading.
  • the distance between the top of the sheet stack and the feed path entrance varies with the height of the stack.
  • the increment of rotation of the feed rollers calculated to advance the leading edge of each sheet through the feed path entrance and into the nip of feed rollers stationed therebeyond is also invariably constant, regardless of the stack height. If the sheet feeding rollers in the feed path itself are not rotating at the time of arrival of the sheet, considerable sheet buckling occurs for certain conditions of stack height. If the sheet buckling becomes excessive, the sheets may be wrinkled or creased, and jams may result.
  • the floating character of the feed rollers also tends to prevent skewingof the individual sheets as they are separated from the stack and fed successively through the feed path entrance.
  • a pair of laterally spaced feed rollers are biased downwardly against the uppermost sheet of the stack, and the two rollers are commonly driven so as to provide nonskewed feeding of the individual sheets.
  • slight differences in the stack height beneath the feed rollers would result in differential feeding engagement therewith and, in all likelihood, skewing.
  • sheet storage and feeding apparatus including a storage tray for accommodating sheets in stacked relation, which tray is mounted in a substantially free-floating manner relative to fixedly positioned sheet feeding means.
  • the present invention provides a stack storage tray whose sole means of vertical support is provided by a fulcrum about which the tray is pivoted to bias the uppermost sheet of the stack thereon into feeding engagement with one or more feed rollers, whose axes of rotation are fixedly positioned.
  • the top of the stack is always referenced against the feed rollers, and the starting point for each sheet is uniformly the same regardless of the height of the stack.
  • means are provided to permit a limited amount of rolling motion of the storage tray on the fulcrum.
  • the assembly of the invention further includes sheet separator-stack alignment elements which serve the dual function of insuring that only the topmost sheet is fed from the stack for each cycle and aligning the forward or leading edge of the stack when loaded on the storage tray.
  • the sheet-separatoredge alignment elements are further adapted to be elevated from the floor of the storage tray when the storage tray is pivoted about the fulcrum to a loading position. In the loading position, the feed rollers are spaced from the tray so as to afford unencumbered loading of a stack on the tray.
  • latch means is provided for releasably retaining the tray in its loading position, thus relieving both hands of the operator for the loading operation.
  • a principal object thereof is to provide new and improved sheet storage and feeding apparatus particularly suited for use in photocopier machines.
  • An additional object is to provide apparatus of the above character for accommodating a supply stack of paper sheets from which sheets are successively fed toand through the entrance of a feed path through the photocopier and wherein the apparatus automatically compensates for variations in the stack height.
  • a further object of the present invention is to provide apparatus of the above character wherein a storage tray accommodating the stacked sheets floats relative to one or more feed rollers driven about a fixed axis. 7
  • Still another object of the invention is to provide apparatus of the above character which is reliable in operation, simplified in design, inexpensive to manufacture and convenient to use.
  • FIG. 1 is a generalized overall diagrammatic view of a photocopier employing sheet storage and feeding apparatus constructed according to one embodiment of the invention
  • FIG. 2 is an enlarged side elevational view, partially in section, of the sheet storage and feeding apparatus of the invention
  • FIG. 3 is a sectional view taken along line 3-3 of FIG. 2;
  • FIG. 4 is a top plan view of the apparatus of the invention.
  • the sheet storage and feeding apparatus of the invention is shown incorporated in a photocopier machine of the type disclosed in the commonly assigned, copending application of Joseph F. Miciukiewicz, Ser. No. 730,765, filed May 21, i968. It will be appreciated however that the apparatus of the invention may be incorporated in other types and varieties of photocopiers, as well as sheet processing apparatus generally. Moreover, while the disclosed embodiment of the invention is adapted for handling copy paper sheets on which an electrostatic image is formed and then developed, it will be appreciated that the apparatus 10 may also be adapted to accommodate stacks of original document sheets which are to be copied.
  • FIG. 1 includes at least a diagrammatic showing of all the major working components of a photocopier machine.
  • FIG. 1 The various components shown in FIG. 1, including the sheet storage and feeding apparatus are ultimately mounted from a generally rectangular frame (not shown) and enclosed by a housing 12 having various access openings for the ingress and egress of documents to be copied and the egress of copies. Access to the apparatus 10 is provided at the top of the housing 12 through a cover 14 which is hinged at one end, as indicated at 15.
  • a plate 16 defines an inlet guideway for original documents to be copied, and directs the leading edge of the document to the nip of a pair of feed rollers 18 and 20.
  • a pair of substantially vertical guide plates 22 and 24 define a portion of document feed path which extends downwardly along the front edge of the photocopier.
  • Another pair of guide plates 26 and 28 defines a continuation of the document feed path which includes an illuminating station or zone 29 defined by an elongated slit 30 in guide plate 26.
  • Adjacent to the lower end of the guide plates 16 and 28 is another pair of feed rollers 32 and 34 which directs the document between the curved guide plates 36 and 38 and out of the photocopier.
  • feed rollers 18, 20, 32, and 34 are synchronously driven from the main drive of the photocopier pursuant to translating successive original documents along the document feed path through the photocopier.
  • an optical system comprising a source of illumination in the form of a lamp 42 and a projecting shield 44 concentrates a beam of light on the illuminating station 29 during the time the original document is fed therethrough. Rays of light are reflected from the indicia side of the document to a mirror 46 which directs the reflected light through a focusing lens 48 to a reflex lens 50, having a reflective surface 52.
  • the rays oflight forming an image of the indicia borne by the document are then reflected back through the focusing lens 48 to another mirror 54 and thence to an elongated slit 56 in a guide plate 58 which, together with a juxtaposed guide plate 60 defines an exposing station or zone 61 for a sheet of copy paper fed therethrough by means to be described.
  • the sheet storage and feeding apparatus 10. includes a storage tray 62 accommodating a stack 64 of copy paper sheets.
  • the storage tray 62 is universally pivotally supported solely by the crowned upper surface of a fulcrum 66 which is in turn mounted on a stationary frame member 68.
  • the storage tray 62 In its operational position, the storage tray 62 is pivoted on a fulcrum 66 in the clockwise direction, as seen in FIG. 1, by the resilient force of a spring 70. This biases the forward end of the tray 62 upwardly to maintain the uppermost sheet on stack 64 in feeding engagement with a pair of feed rollers 76 (FIGS. 1 and 3).
  • spring 70 is hooked to a stationary rod 71 mounted by the photocopier frame while the upper end of the spring threadedly engages a screw 72 whose conical head is nested in a tapered aperture 73 formed in the floor 74 of storage tray 62.
  • screw 72 By merely turning screw 72, the tension of spring 70 may be conveniently adjusted.
  • a pair of guide plates 78 and 80 Positioned adjacent to the front of storage tray 62 is a pair of guide plates 78 and 80 which are suitably shaped so as to provide a relatively wide entrance 81 into the copy paper feed path.
  • the guide plates 78 and 80 include juxtaposed vertical segments which direct the leading edge of each copy sheet to the nip of a pair of feed rollers 82 and 84.
  • a corona discharge unit 86 of known construction which imparts a uniform electrostatic surface charge to each sheet of copy paper passing through.
  • the copy paper sheets then pass through the exposing station 61 where the surface charge is selectively discharged by the light image originating from the illuminating station 29 so as to form a corresponding latent electrostatic image on the copy sheet.
  • feed rollers 88 and 90 feed the copy sheets into a developing tank 92 which contains a suitable toner for developing the latent electrostatic image thereon.
  • Suitable guide elements 94 and 96 guide the copy paper sheets through the tank and direct the leading edge thereof to another pair of feed rollers 98 and 100 which also act as squeegee rollers to squeeze all excess toner from the copy sheets.
  • a pair of juxtaposed guide plates 102 and 104 guide the copy sheets through a drying zone and between a final pair of feed rollers 106 and 108 which deliver the copy sheets to a receiving tray 110 where they are accessible to the operator through an opening 112 formed in the front of the housing 12.
  • control components including sheet-sensing switches 114 and 116 stationed adjacent the copy sheet feed path and document feed path, respectively, coordinate the drive to the various sheet feeding elements and the operations of the lamp 42 and corona discharge unit 86.
  • a gear train is controlled to selectively communicate drive to the feed rollers 76.
  • FIGS. 2 through 4 in conjunction with FIG. 1 for the structural details of the apparatus 10.
  • the sole vertical support for the storage tray 62 is provided by the fulcrum 66 whose crowned tip bears against the bottom surface of the tray floor 74 at a point substantially on or at least in close proximity to the longitudinal centerline of the storage tray.
  • This point of engagement is also preferably but not necessarily located substantially at the midlength of the storage tray 62, as seen in FIG. 4.
  • the position of the spring 70 is preferably in substantial longitudinal alignment with the fulcrum 66.
  • the storage tray 62 is essentially free-floating for fore and aft, pitching motion about fulcrum 66. As will be seen, this motion is essential in order to accommodate loading of the storage tray 62 with stacks of copy paper and also for maintaining feeding engagement between the topmost sheet on the stack and the feed rollers 76. It is also essential to provide for a degree of lateral pivoting or rolling motion of the tray 62 about fulcrum 66 in order to compensate for minor variations in the stack height beneath the feed rollers 76 which would otherwise give rise to differential feeding engagement of the two rollers 76 with the topmost sheet in the stack 64.
  • This floating characteristic of the mounting for storage tray 62 is an important feature of the invention since it permits the feed rollers 76 to be mounted on a drive shaft 122 whose axis is fixedly positioned as seen in FIGS, 3 and 4.
  • the storage tray 62 flats, rather than feed rollers 76 as in prior art devices of this type, in order to compensate for variations in the stack height. This a provides for considerable simplification of the power train for communicating drive to the feed rollers 76.
  • drive shaft 122 is journaled in bushings 124 mounted by side frame members 126, which may be constituted by the main rectangular mounting frame of the photocopier itself.
  • One end of the drive shaft 122 extends beyond one of the side frames 126 and receives a gear 127 included in the gear train 120 (FIG. 1).
  • the feed rollers 76 on drive shaft 122 may be shifted axially for various widths of copy paper.
  • each tab 128 is formed having an elongated vertical slot at 129 (FIG. 2) adapting the tabs to embrace inwardly extending studs secured to the side frames 126.
  • one of the studs stud 130 is formed having a wide notch 132 which is received in the slot 129 of one of the tabs 128.
  • the other, stud 134 has a notch 135 whose width is just slightly in excess of the thickness of the other tab 128.
  • the outer end portion of stud 134 is threaded through a pair of nuts 136 positioned on opposite sides of one of side frames 126.
  • tray 62 may be shifted laterally to adjust its registry with the entrance 81 of the copy paper feed path.
  • the studs are in lateral alignment with the fulcrum 66 to accommodate pitching motion of t ray 62. Since the studs are accommodated in elongated slots 129, some roll is permitted, but yaw of the tray is inhibited.
  • the stack 64 of copy sheet is accommodated on tray 62 between a pair of side rails 140, one or both of which may be adjustable in order to accommodate copy paper of different widths.
  • each comer separator is mounted to each side rail 140 and is adapted in a known manner to effect separation of the successive topmost sheets from the stack 64 upon rotation of the feed rollers 76 for serial introduction through the entrance 81 into the copy paper feed path.
  • each comer separator includes an elongated arm 143 having one end pivotally mounted on a pin 144 secured to as side rail 140. The other end of each arm 143 is turned'inwardly to provide a flat surface 146 which rests on a corner of the leading edge of the uppermost sheet on the stack 64. An integral extension of each arm 143 extends downwardly to provide a elongated depending tabs 148 as best seen in FIGS.
  • the tabs 148 of the comer separators 142 are elongated so as to also function as aligning elements for the leading edges of the sheets in the stack 64. Moreover, the elongated tabs 148 insure proper loading of the tray by serving as abutments for locating the forward edge of the stack itself in proper relation to the entrance 8] of the copy paper feed path.
  • the lower guide plate 80 constituting the lower boundary of the copy paper feed path entrance 81, is extended downwardly just forwardly of the tabs 148 and provided with. generally horizontally extended ledges 151 underlying each corner separator tab 148.
  • the invention includes the provision of a latch, generally indicated at 152 in FIGS, 1 and 2.
  • the latch 152 may be mounted to the copier frame or to the housing 12, as desired, and includes a pair of resilient members 153 and 154 made, for example, from spring stock.
  • Member 153 bears against the front of housing 12 so as to bias member 154 toward its operative positio n.
  • the upper end of member 154 is deformed to provide a striker tab l56which is engaged by the cover 14, when closed so as to deflect the member 154 to its inoperative position, as seen in FIG.- 1.
  • member 154 is released tospring toward the rear edge of the storage tray 62.
  • tray-62 isrocked forwardly against the force of spring 70, the rear edge of the tray, 62 is engaged in a crook 158 formed in member 154.
  • the latch 15 2 therefore serves to maintain the storage tray 62 in the loading position shown in FIG. 2, thus freeing both hands of the operator for loading of a stack 64: of copy sheets on the tray. As is seen, this loading position not only spaces the feed rollers 76 from the tray, but also automatically lifts the corner separators 142 to clear way for proper placement of the stack 64 on the storage tray 62. After loading has been accomplished, the cover 14 is closed. The member 154 of.
  • latch 152 is urged to the right by the cover as seen in FIG. 1, thereby releasing the tray 62 which is then rocked back on fulcrum 66 by the force of spring 70 bringing the uppermost sheet of the stack 64 into feeding engagement with the rollers 76.
  • the apparatus of the present invention inherently facilitates the establishment of the proper degree of sheet buckling, since, due to the floating character of the tray 62, the distance travelled by each copy sheet in reaching the nip of feed rollers 82 and 84 remains the same regardless of the stack height. Thus, the increment of rotation of the feed rollers 76 required to feed the leading edge of each copy sheet to the nip of feed rollers 82 and 84 with the appropriate amount of sheet buckling remains constant regardless of the height of stack 62.
  • Sheet storage and feeding apparatus comprising, in combination:
  • C. means for supporting said tray for substantially free floating, universally pivotal motion relative to said feed roller, whereby said tray can shift its orientation in relation to said fixed axis to compensate for variations in the thickness of said stack of sheets;
  • said support means comprises a stationary fulcrum located along the longitudinal centerline of said tray and providing a vertical support for said tray.
  • pivoting means includes:
  • pivoting means further includes:
  • a screw having a head engaging said tray and a body threadedly engaging the upper end portion of said spring, a) whereby rotation of said screw adjusts the tension of said spring.
  • each corner separator-edge alignment element pivotally mounted to each side of said tray, each said element havmg l. an elongated depending tab for positioning and aligning the forward edge of a stack on said tray;
  • G a latch releasably retaining said tray in said loading positlon.
  • H a cover member providing access to said tray, said cover 1. adapted to engage said latch, when closed, to cause release or said tray and, when open, permitting said latch to engage said tray when it is pivoted into said loading position.
  • said studs being positioned in lateral alignment with said support means whereby to guide said tray pitching motion and a degree of rolling motion of said tray, and to prevent yaw motion of said tray.
  • said one stud being laterally adjustable to adjust the lateral positioning of said tray.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Pile Receivers (AREA)
US844094A 1969-07-23 1969-07-23 Paper tray for photocopy machine Expired - Lifetime US3599972A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84409469A 1969-07-23 1969-07-23

Publications (1)

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US3599972A true US3599972A (en) 1971-08-17

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Application Number Title Priority Date Filing Date
US844094A Expired - Lifetime US3599972A (en) 1969-07-23 1969-07-23 Paper tray for photocopy machine

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US (1) US3599972A (enrdf_load_stackoverflow)
DE (1) DE2036018A1 (enrdf_load_stackoverflow)
FR (1) FR2053103B1 (enrdf_load_stackoverflow)
GB (1) GB1280242A (enrdf_load_stackoverflow)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4926611U (enrdf_load_stackoverflow) * 1972-06-09 1974-03-07
JPS49131139A (enrdf_load_stackoverflow) * 1973-04-20 1974-12-16
JPS507051U (enrdf_load_stackoverflow) * 1973-05-18 1975-01-24
US3871576A (en) * 1969-07-29 1975-03-18 Ibm Data recorder and verifier
US3919972A (en) * 1971-06-04 1975-11-18 Canon Kk Automatic cut sheet feeding unit
US4017181A (en) * 1973-05-08 1977-04-12 Canon Kabushiki Kaisha Copy medium carrier
US4032136A (en) * 1973-04-06 1977-06-28 Canon Kabushiki Kaisha Feed cassette
US4221375A (en) * 1978-12-04 1980-09-09 Pitney Bowes Inc. Copy sheet handling apparatus for a copier
US4591141A (en) * 1983-03-14 1986-05-27 Burroughs Corporation Pivot point sheet feeder
US5634188A (en) * 1996-01-11 1997-05-27 Xerox Corporation Reproduction machine having a high capacity cassette tray assembly
US5695184A (en) * 1996-07-01 1997-12-09 Xerox Corporation Document production machine having a high capacity, high reliability cassette tray sheet feeding assembly

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147341A (en) * 1976-02-19 1979-04-03 U.S. Philips Corporation Card feeder device
DE3045822A1 (de) * 1980-12-05 1982-07-08 Philips Patentverwaltung Gmbh, 2000 Hamburg Vereinzelungsvorrichtung fuer aufzeichnungstraeger
DE3247341A1 (de) * 1982-12-17 1984-06-20 Mannesmann AG, 4000 Düsseldorf Vorrichtung fuer die zufuehrung einzelner blaetter von einem blattstapel
US4681422A (en) * 1984-11-01 1987-07-21 Tokyo Electric Co., Ltd. Paper supply device for an electrostatic photographic printer

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390277A (en) * 1888-10-02 allen
US825264A (en) * 1905-08-19 1906-07-03 Dick Co Ab Sheet-feeding apparatus.
US3260521A (en) * 1963-08-12 1966-07-12 Minnesota Mining & Mfg Paper feed device
US3369804A (en) * 1965-11-26 1968-02-20 Addressograph Multigraph Sheet feeding apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US390277A (en) * 1888-10-02 allen
US825264A (en) * 1905-08-19 1906-07-03 Dick Co Ab Sheet-feeding apparatus.
US3260521A (en) * 1963-08-12 1966-07-12 Minnesota Mining & Mfg Paper feed device
US3369804A (en) * 1965-11-26 1968-02-20 Addressograph Multigraph Sheet feeding apparatus

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3871576A (en) * 1969-07-29 1975-03-18 Ibm Data recorder and verifier
US3919972A (en) * 1971-06-04 1975-11-18 Canon Kk Automatic cut sheet feeding unit
JPS4926611U (enrdf_load_stackoverflow) * 1972-06-09 1974-03-07
US4032136A (en) * 1973-04-06 1977-06-28 Canon Kabushiki Kaisha Feed cassette
JPS49131139A (enrdf_load_stackoverflow) * 1973-04-20 1974-12-16
US4017181A (en) * 1973-05-08 1977-04-12 Canon Kabushiki Kaisha Copy medium carrier
JPS507051U (enrdf_load_stackoverflow) * 1973-05-18 1975-01-24
US4221375A (en) * 1978-12-04 1980-09-09 Pitney Bowes Inc. Copy sheet handling apparatus for a copier
US4591141A (en) * 1983-03-14 1986-05-27 Burroughs Corporation Pivot point sheet feeder
US5634188A (en) * 1996-01-11 1997-05-27 Xerox Corporation Reproduction machine having a high capacity cassette tray assembly
US5695184A (en) * 1996-07-01 1997-12-09 Xerox Corporation Document production machine having a high capacity, high reliability cassette tray sheet feeding assembly

Also Published As

Publication number Publication date
FR2053103A1 (enrdf_load_stackoverflow) 1971-04-16
FR2053103B1 (enrdf_load_stackoverflow) 1973-05-25
DE2036018A1 (de) 1971-01-28
GB1280242A (en) 1972-07-05

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