US3815899A - Sheet delivery device - Google Patents

Sheet delivery device Download PDF

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Publication number
US3815899A
US3815899A US00342654A US34265473A US3815899A US 3815899 A US3815899 A US 3815899A US 00342654 A US00342654 A US 00342654A US 34265473 A US34265473 A US 34265473A US 3815899 A US3815899 A US 3815899A
Authority
US
United States
Prior art keywords
roll
sheet
corner
shaft
tray
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
US00342654A
Other languages
English (en)
Inventor
J Hatzmann
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.)
Xerox Corp
Original Assignee
Xerox Corp
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 Xerox Corp filed Critical Xerox Corp
Priority to US00342654A priority Critical patent/US3815899A/en
Priority to CA192,029A priority patent/CA994377A/en
Priority to DE2410493A priority patent/DE2410493C3/de
Priority to GB1157574A priority patent/GB1456422A/en
Priority to JP3085774A priority patent/JPS5712779B2/ja
Priority to FR7409303A priority patent/FR2222295B1/fr
Priority to NLAANVRAGE7403705,A priority patent/NL174711C/xx
Application granted granted Critical
Publication of US3815899A publication Critical patent/US3815899A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • G03G15/6552—Means for discharging uncollated sheet copy material, e.g. discharging rollers, exit trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/20—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders
    • B65H29/22—Delivering or advancing articles from machines; Advancing articles to or into piles by contact with rotating friction members, e.g. rollers, brushes, or cylinders and introducing into a pile

Definitions

  • ABSTRACT [22] F'led: 1973 A sheet delivering and propelling device for use in a [21] Appl. No.: 342,654 reproducing machine for moving copy sheets from the end of a delivery or processing surface to a collecting tray.
  • the device comprises resilient foam rolls [52] US. Cl. 271/80, 271/ 178 mounted on a delivery Shaft which extends substan [51] it.
  • each roll is 6 H greater than the distance between the axis of the delivery shaft and the top surface of the processing surface [56] References and to thereby continuously compress and release radial UNITED STATES PATENTS sectors of the foam rolls which, after passage of the 2,389,848 11/1945 Gibson et al 271 /69 X sheets thereunder, momentarily thrust the sheets 3,052,467 9/1962 Fertig t 271/87 X toward the collecting tray.
  • This invention relates to a sheet delivery and propelling device for positively moving processed copy sheets from a processing plane to a collecting tray.
  • this invention relates to a sheet handling device suitable for use in an automatic copying or facsimile machine for delivering processed copy sheets to a collecting tray.
  • the compactness of the machines necessitates a document drive arrangement which is capable of dependably moving a copy sheet from an entrance or delivery area, through the processing machine, to an exit or collecting tray.
  • a document drive arrangement which is capable of dependably moving a copy sheet from an entrance or delivery area, through the processing machine, to an exit or collecting tray.
  • higher requirements of positive movement are placed on the arrangements for delivering the copy sheets into the collecting tray which may occupy a relatively confined space.
  • the collecting tray may extend at such an angle so as to make it difficult to easily move processed copy sheets thereinto rapidly and accurately. This tends to cause the sheets to curl or become misaligned, ultimately resulting in the sheets either walking" out of the collecting tray area or backing up into the copy sheet processing mechanism. Even where the sheets remain within the collecting area, they tend to become misaligned, thus requiring the operator to restack the sheets upon removal from the machine. This results in increased work load on the operator with consequent loss of efficiency in the copying or reproducing process.
  • the collection tray may be placed well below the last processing station so that gravity may be effectively used to draw the paper into the collection tray.
  • the collection tray may have to be placed only a relatively short distance below the delivery or processing plane such that the lead edge of the sheet contacts the collection tray while the trailing edge of the same sheet has not yet cleared the delivery roll. Under these circumstances, the effects of gravity may not be sufficient to adequately propel the sheet into the tray.
  • Another object is to improve the efficiency and reliability of sheet stacking in automatic copying and facsimile machines.
  • a still further object is the provision of a paper propelling and delivery device for use in very compact reproducing machine arrangements.
  • a further object is to provide a delivery device which reduces the backing up of copy sheets into the processing section of the machine.
  • a sheet delivery and propelling device comprising a roll made of resilient material such as open cell polyurethane foam which is arranged to advance copy sheets.
  • the resilient roll is mounted on a shaft substantially directly above a portion of the copy support surface at which said support surface drops-off or inclines downwardly.
  • the roll has a radius which is greater than the distance from the center of the roll to the support surface vertically thereunder and includes tiny finger-like projections on the periphery thereof which tend to grasp and propel the trailing edge of the copy sheets.
  • FIG. 1 is a side-elevation view of the exit end of a recording or copy machine with the side walls of the apparatus removed for clarity and showing the resilient roll of the invention
  • FIG. 2 is a top view of the machine shown in FIG. 1;
  • FIG. 3 is an enlarged view of the roll at the area of intersection with the copy sheet.
  • a copy or facsimile machine comprising a processing or delivery surface 2 on which the copy sheet moves in the direction indicated by the arrow toward a delivery roll assembly 3.
  • the surface 2 is generally flat and extends across the width of the machine.
  • the surface 2 includes an ascending section 10 which inclines upwardly in the direction of the delivery roll assembly 3. Alternatively, a horizontally disposed section may be used.
  • a copy sheet is moved toward the delivery roll assembly 3 by means of another driven roll or processing drum (not shown) located adjacent the bottom of the inclined surface 2.
  • the surface 2 may be an integral part of a bracket 20 supported by conventional means from the side walls 4 and 5 of the housing.
  • Theprocessing surface 2 as shown in FIG. 1, also forms a crest or corner 11, and thereafter forms a descending section 9 which drops-off or inclines downwardly toward a collection tray 12.
  • the corner 11 is rounded intermediate the ascending and descending sections of surface 2.
  • the collection tray 12 is disposed in front of the advancing copy sheet and includes a base plate 13 which is inclined slightly upwardly in the direction of paper advance.
  • the lowermost end 14 of the base plate 13 terminates adjacent the descending section 9 of the processing surface 2 to prevent passage of copy sheets therebetween.
  • the roll assembly 3 comprises a shaft 6 mounted for rotation in bearings in the side walls 4 and 5.
  • the shaft 6 is rotated by means of a belt 7 attached to a motor 9.
  • the axis of the shaft 6 is disposed substantially vertically above the corner 11, however, the exact location of the shaft may be varied somewhat without effecting the satisfactory operation of the arrangement.
  • Mounted on the shaft 6 are a plurality of rolls 8 made of a resilient open cell polyurethane foam.
  • the outer radius of each of the rolls 8 is selected to be greater than the vertical distance between the axis of the shaft 6 and the nearest portion of the surface 2.
  • the resiliencyof the rolls 8 is such that adequate frictional contact is created between the periphery of the rolls 8 and the paper sheet to move the sheet along the processing surface 2.
  • a characteristic of the foam used in the construction of the rolls 8 is that when it is cut, a plurality of tiny elongated fingers or projections 15, FIG. 3, are created at the periphery of the rolls which'extend generally radially. As will be described hereinafter, these fingers 15, along with sections of the rolls 8 in contact with the surface 2, become energy-loaded through compression and bending during rotation of the rolls. Subsequently, as the rolls 8 continue rotation these energy-loaded sections of the rolls are released in an area just beyond the corner 11. If, as this energy release is taking place, the trailing edge of the copy sheet 21 has just cleared the corner 11, the trailing edge is acted upon by the fingers l and accelerated momentarily in the direction of the collection tray 12. This added thrust is sufficient to assist in propelling the copy sheet into the collection tray 12.
  • FIG. 3 another characteristic of the roll arrangement of the invention is that the surface area of the rolls 8 in driving Contact with the paper 21 is greater than in prior art devices for this purpose. More specifically, prior art drive arrangements generally utilize hard rubber rolls in place of foam rolls of the invention. Such rolls tend to contact the processing surface in only a relatively small area. Contrary to this, the area of driving contact or pinch area associated with the foam rolls of the invention extends from an area well in front of the corner 11 toan area beyond the midpoint of thecornerll. As will be understood, this is a result of the large radius of the rolls 8 relative to the distance from the center of the rolls to the processing surface and the easy compressibility of the rolls. The combination of the above parameters combines to direct the force of the above-noted energy release advantageously against the trailing edge of the copy sheet.
  • the general path of a copy sheet 21 through the illustrated arrangement is upwardly along the ascending inclined section of surface 2, over the corner or crest 11, and down the downwardly inclined section 9 into the collection tray 12.
  • the lead edge of the copy sheet 21, after going over the crest 11, generally rotates downwardly to initially contact the lower portion 14 of the base plate 13 and is subsequently pushed upwardly by the continuous driving action of the delivery roll arrangement 3, as will be explained in greater detail hereinafter.
  • An arrangement for propelling a sheet of paper into a collection tray comprising,
  • Apparatus for delivering copy sheets from a processing surface to a collecting tray located forwardly and below said surface comprising a resilient roll, means mounting said roll for rotation above said surface, said roll having a radius sufficiently large such that peripheral areas thereof are continuously compressed by said surface during rotation to energy-load said roll, said surface adjacent said area of compression being shaped to allow release of said roll against the trailng edge of said sheet to accelerate said sheet in the direction of its advance after passage thereunder.
  • An arrangement for moving a sheet of paper into a collection tray comprising a surface on which said sheet is conveyed, said surface defining a corner, roll means mounted for rotation above said corner, a peripheral sector of said roll means being continuously compressed by said surface adjacent said corner to thereby energy-load said roll means, the compressed sector being released by rotation beyond said corner, whereby upon passage of the trailing edge of said sheet over said corner the release of said sector propels said sheet momentarily in the direction of said tray.
  • said roll means comprises a plurality of open-cell rolls spaced apart across the width of said sheet.
  • Apparatus for delivering a sheet from a processing surface to a collecting tray located forwardly of and below said surface comprising a roll having resilient hairlike projections integral therewith over substantially the entire periphery thereof, means for mounting said roll for rotation above said surface, said roll having a radius sufficiently large to continuously bend some of said projections by contact with said surface during rotation of said roll to thereby energy load said projections, whereby when the trailing edge of said sheet passes under said roll it is accelerated by the release of said projections beyond the area of contact with said surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
US00342654A 1973-03-19 1973-03-19 Sheet delivery device Expired - Lifetime US3815899A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US00342654A US3815899A (en) 1973-03-19 1973-03-19 Sheet delivery device
CA192,029A CA994377A (en) 1973-03-19 1974-02-07 Sheet delivery device with resilient rolls
DE2410493A DE2410493C3 (de) 1973-03-19 1974-03-05 Fördervorrichtung für blattförmige Materialien
GB1157574A GB1456422A (en) 1973-03-19 1974-03-15 Sheet delivery device
JP3085774A JPS5712779B2 (enrdf_load_stackoverflow) 1973-03-19 1974-03-18
FR7409303A FR2222295B1 (enrdf_load_stackoverflow) 1973-03-19 1974-03-19
NLAANVRAGE7403705,A NL174711C (nl) 1973-03-19 1974-03-19 Inrichting voor het bij een kopieermachine deponeren van een gekopieerd blad papier in een verzamelruimte.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00342654A US3815899A (en) 1973-03-19 1973-03-19 Sheet delivery device

Publications (1)

Publication Number Publication Date
US3815899A true US3815899A (en) 1974-06-11

Family

ID=23342716

Family Applications (1)

Application Number Title Priority Date Filing Date
US00342654A Expired - Lifetime US3815899A (en) 1973-03-19 1973-03-19 Sheet delivery device

Country Status (7)

Country Link
US (1) US3815899A (enrdf_load_stackoverflow)
JP (1) JPS5712779B2 (enrdf_load_stackoverflow)
CA (1) CA994377A (enrdf_load_stackoverflow)
DE (1) DE2410493C3 (enrdf_load_stackoverflow)
FR (1) FR2222295B1 (enrdf_load_stackoverflow)
GB (1) GB1456422A (enrdf_load_stackoverflow)
NL (1) NL174711C (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257587A (en) * 1978-10-30 1981-03-24 Xerox Corporation Document registering and feeding apparatus
US4315621A (en) * 1979-06-07 1982-02-16 International Business Machines Corporation Sheet collating deflector
US4650351A (en) * 1985-04-30 1987-03-17 International Business Machines Corporation Thermal printer
US4905984A (en) * 1982-09-21 1990-03-06 Xerox Corporation Set transport
US4988087A (en) * 1989-07-03 1991-01-29 Xerox Corporation Sheet Stacker
US5018720A (en) * 1990-03-22 1991-05-28 Ncr Corporation Document transport module
US6145833A (en) * 1998-06-02 2000-11-14 Marquip, Inc. Rotary brush sheet deceleration device
US20070286657A1 (en) * 2006-05-10 2007-12-13 Sharp Kabushiki Kaisha Paper discharge structure and image forming apparatus using the same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61189052U (enrdf_load_stackoverflow) * 1985-05-17 1986-11-25
DE8703083U1 (de) * 1987-02-27 1987-06-11 Siemens Nixdorf Informationssysteme AG, 33106 Paderborn Transportvorrichtung für Blattmaterial

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389848A (en) * 1941-12-18 1945-11-27 Ditto Inc Paper handling mechanism for duplicating machines
US3052467A (en) * 1960-07-18 1962-09-04 Ibm Stacker for intermixed documents of varying size
US3166313A (en) * 1960-08-27 1965-01-19 Telefunken Patent Article handling device
US3351215A (en) * 1964-10-14 1967-11-07 Schjeldahl Co G T Sheet article stacker

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755086A (en) * 1953-01-05 1956-07-17 Fibreboard Products Inc Feeding method and apparatus for paper or the like

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2389848A (en) * 1941-12-18 1945-11-27 Ditto Inc Paper handling mechanism for duplicating machines
US3052467A (en) * 1960-07-18 1962-09-04 Ibm Stacker for intermixed documents of varying size
US3166313A (en) * 1960-08-27 1965-01-19 Telefunken Patent Article handling device
US3351215A (en) * 1964-10-14 1967-11-07 Schjeldahl Co G T Sheet article stacker

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257587A (en) * 1978-10-30 1981-03-24 Xerox Corporation Document registering and feeding apparatus
US4315621A (en) * 1979-06-07 1982-02-16 International Business Machines Corporation Sheet collating deflector
US4905984A (en) * 1982-09-21 1990-03-06 Xerox Corporation Set transport
US4650351A (en) * 1985-04-30 1987-03-17 International Business Machines Corporation Thermal printer
US4988087A (en) * 1989-07-03 1991-01-29 Xerox Corporation Sheet Stacker
US5018720A (en) * 1990-03-22 1991-05-28 Ncr Corporation Document transport module
US6145833A (en) * 1998-06-02 2000-11-14 Marquip, Inc. Rotary brush sheet deceleration device
US20070286657A1 (en) * 2006-05-10 2007-12-13 Sharp Kabushiki Kaisha Paper discharge structure and image forming apparatus using the same
US7853192B2 (en) 2006-05-10 2010-12-14 Sharp Kabushiki Kaisha Paper discharge structure and image forming apparatus using the same

Also Published As

Publication number Publication date
DE2410493B2 (de) 1978-10-12
JPS5712779B2 (enrdf_load_stackoverflow) 1982-03-12
CA994377A (en) 1976-08-03
FR2222295A1 (enrdf_load_stackoverflow) 1974-10-18
DE2410493A1 (de) 1974-10-03
JPS50112048A (enrdf_load_stackoverflow) 1975-09-03
NL174711B (nl) 1984-03-01
GB1456422A (en) 1976-11-24
NL174711C (nl) 1984-08-01
NL7403705A (enrdf_load_stackoverflow) 1974-05-27
FR2222295B1 (enrdf_load_stackoverflow) 1977-06-17
DE2410493C3 (de) 1979-06-13

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