US3888478A - Sheet limiter - Google Patents

Sheet limiter Download PDF

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Publication number
US3888478A
US3888478A US472743A US47274374A US3888478A US 3888478 A US3888478 A US 3888478A US 472743 A US472743 A US 472743A US 47274374 A US47274374 A US 47274374A US 3888478 A US3888478 A US 3888478A
Authority
US
United States
Prior art keywords
sheet
entrance path
shoulder surface
stop
sheets
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
US472743A
Other languages
English (en)
Inventor
Jr Albert D Alderman
Gabriel B Cherian
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.)
Sperry Corp
Original Assignee
Sperry Rand 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 Sperry Rand Corp filed Critical Sperry Rand Corp
Priority to US472743A priority Critical patent/US3888478A/en
Priority to GB2149975A priority patent/GB1464513A/en
Priority to DE19752522664 priority patent/DE2522664A1/de
Priority to JP50062419A priority patent/JPS515017A/ja
Application granted granted Critical
Publication of US3888478A publication Critical patent/US3888478A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H7/00—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles
    • B65H7/02—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors
    • B65H7/06—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed
    • B65H7/12—Controlling article feeding, separating, pile-advancing, or associated apparatus, to take account of incorrect feeding, absence of articles, or presence of faulty articles by feelers or detectors responsive to presence of faulty articles or incorrect separation or feed responsive to double feed or separation

Definitions

  • a sheet-feed control mechanism limits the flow of original sheets manually inserted into a copy machine.
  • the control mechanism comprises a stationary shoul- Cler surface and a movable stop positioned on opposite sides of a sheet entrance path.
  • the movable stop is selectively movable into the sheet entrance path to direct leading edges of newly inserted sheets against the shoulder surface while allowing a previously inserted sheet to continue to move beyond the shoulder surface.
  • An original sheet sensor and a stop motivating solenoid move the stop into and out of the sheet en trance path at appropriate times.
  • This invention relates broadly to the art of sheet feeding and more specifically to sheerl'eed control apparatus which serve to regulate the insertion of sheets into sheet processing machines.
  • Some copy machines can recei ⁇ e and copy original documents at unusually fast rates.
  • at least one copy machine (described in copending application Ser. No. 327.405 filed Jan. 29. I973. now US. Pat. No. 3.834.805 entitled Xerographic (opier with Asynchronous Copy] is ready to receive a subsequent original document for copying almost as soon as a previously inserted original document has fully entered the copy machine.
  • a problem arises however in that an operator who is inserting original copies into the machine. one after the other. may overlap the original doeu ments. if he is inserting too rapidly. or leave an undue amount of space between thetn. if he is not inserting rapidly enough. The former situation leads to malfunctions of the machine and the latter situation wastes time.
  • a shoulder surface and a movable stop are positioned on opposite sides of a sheet entrance path of a copy machine.
  • the movable stop When the movable stop is moved into the sheet entrance path, it directs the leading edges of sheets thereafter inserted into the sheet entrance path against the shoulder surface; however. it allows sheets which were previously inserted into the sheet entrance path to pass the shoulder surface.
  • a sensor and stop motivator selectively move the stop out of the sheet entrance path when the copy machine is prepared to receive a sheet and into the sheet entrance path when a sheet leading edge is beyond the shoulder surface.
  • FIG. I is a sectional view of a copy machine including a sheet-feed control mechanism employing principles of this invention
  • HG. 2 is a view taken on line 2-2 of FIG. 1;
  • FIG. 3 is an isometric view of a portion of the sheetfeed control mechanism of FIGS. l and 2'.
  • FIGS. 4 and 5 are sectional views of a sheeH'eed con trol mechanism employing principles of this invention in two modes of operation.
  • a copy machine ll receives original documents at an original entrance I3 and expels them from an exit onto an exit tray I7.
  • the original documents are hand fed. one after the other. into the original entrance 13 until they are gripped by entrance rollers I).
  • the entrance rollers 19 then feed the original documents past a window 2] to exit drive rollers 23.
  • the original documents are scanned at the window 2] for the purpose of making copies thereof; however. it is not thought necessary to go into greater detail of the copy machine I] inasmuch as it is not a major part of this invention.
  • a sheet feed control mechanism designated generally by numeral 25. limits the insertion oforiginal documerits through the original entrance 13, along a sheet entrance path 14, to the nip 27 of the entrance drive rollers 19. This mechanism prevents original documents from overlapping but allows original documents to be fed to the copying machine 1] at an optimized rate.
  • the sheet-feed control mechanism comprises an original top guide 29 (defining a notch 31 ⁇ . a stop assembly 33. a solenoid 35, and a sheet sensor 37.
  • the original top guide 29 complements an original bottom guide 39 and a frame element 40 to help define the original entrance l3 and the sheet entrance path 14.
  • the notch 31. with reference to FIG. 4. includes a laterally disposed shoulder 41 which faces the direction from which original documents are inserted into the original entrance 13.
  • the notch 31 and the shoulder 41 are as long as the width of sheets handled by the copy machine 11.
  • the stop assembly 33 includes a stop plate 43 (FIG. 3) having individual stop elements 45 (1-1! extending laterally therefrom.
  • the stop plate 32 is rigidly attached to a rotatable shaft 47.
  • the rotatable shaft 47 is rotatably mounted on a copy machine frame 49 so that the stop elements 45 (1-11 can be rotated into the sheet path 14 at positions immediately adjacent the notch 3
  • a spring lever 51 is also rigidly attached to the shaft 47. and a spring 53, extending between the end of the spring lever 51 and the copying machine frame 49, biases the stop elements 45 0-11 toward the notch 31 to the FIGS. 1 and 4 position.
  • a solenoid lever 55 is also rigidly attached to the shaft 47 and this lever is coupled to the solenoid 35.
  • an armature thereof 57 is pulled downwardly. as illustrated in FIG. 5 so that the stop elements 45 U([ are moved away from the notch 31 against the bias of the spring 53.
  • the sheet sensor 37 is positioned at the nip 27 of the entrance rollers 19 to detect the pressure of an original document at the entrance-roller nip 27.
  • the sheet sensor 37 can have various forms; and. in the illustrated embodiment it is a microswitch which is actuated by contact with sheets at the nip 27.
  • the sheet sensor 37 has the dual purpose of sensing when the leading edge of an original document has passed the shoulder 41 and when the copy machine II is ready to receive another original document. as will be further described below with reference to operation of the device.
  • the sheet sensor 37 is linked to the solenoid 35 via a power supply 59. ln this regard. it should be understood that the circuitry depicted in FIG. 1 is simplified for the purpose of clarity.
  • the power supply 59 in response thereto. energizes the solenoid 35 so that the stop elements 45 a-d are rotated away from the notch 31 out ofthc sheet entrance path.
  • the power supply 59 responds thereto by dcenergizing the solenoid 35.
  • the spring 53 then rotates the stop elements 45 -11 into the sheet entrance path adjacent the notch 31.
  • the sheet sensor 37 In operation. when the copy machine II is first turned on. the sheet sensor 37 does not detect a sheet in the roller nip 27 so the power supply 59 energizes the solenoid 35 to rotate the stop elements 45 a-d away from the notch 31, out of the sheet entrance path.
  • an original sheet 61 which is manually inserted into the original entrance 13 is allowed to pass the notch 31 until its leading edge 63 is inserted into the nip 27 of the entrance rollers 19.
  • the sheet sensor 37 senses this nip insertion and the power supply 59, in response thereto, deenergizes the solenoid 35 to allow the stop elements 45 a-d to move into the sheet entrance path toward the notch 31. as depicted in FIG. 4.
  • the stop elements 45 u-d. pressing on the first original document 6]. direct the leading edge of the additional original document 65 into the laterally displaced shoulder 41 of the notch 31.
  • an operator is prevented from inserting the additional original document 65 into the nip 27 of the rollers 19. however. the first original document 6l can continue to be pulled into the copy machine ll by the entrance rollers 19.
  • the copy machine ll When the following edge of the first original document 6] clears the nip 27 of the rollers 19, the copy machine ll is ready to receive the additional original document 65.
  • the sheet sensor 37 senses when the first original document 6] has cleared the nip 27 and the power supply 59. in response thereto, energizes the solenoid 35 to rotate the stop elements 45 a-d out of the sheet entrance path.
  • the stop elements 45 0-11 are no longer in position to direct the leading edge of the additional original document 65 against the laterally disposed shoulder 41'. so the leading edge of the additional original document 65, due to an inclined disposition of the shoulder surface 41, is allowed to drop into the sheet entrance path and the operator can feed it into the nip 27 of the rollers 19.
  • the sheet sensor 37 senses such insertion and the cycle is repeated.
  • This invention tends to optimize the rate at which original documents can be fed to a copy machine while preventing overlap. or double. feeds.
  • a sheet-feed control mechanism to be used with a sheet processing apparatus which is designed to accept one sheet at a time and which cannot accept a subsequent sheet until a previous sheet has been processed to a predetermined degree.
  • said sheet feed control mechanism comprising:
  • a guide means for defining a sheet entrance path and for guiding sheets inserted into said sheet processing apparatus along said sheet entrance path.
  • said guide means defining a shoulder surface laterally disposed to said sheet entrance path and facing the direction from which sheets are inserted into said sheet entrance path;
  • a movable stop means positioned adjacent said sheet entrance path opposite said shoulder surface.
  • said movable stop means being selectively movable into said sheet entrance path for directing the leading edges of sheets thereafter inserted into said sheet entrance path against said shoulder surface but for allowing a previously inserted sheet to continue to move beyond said shoulder surface. and movable out of said sheet entrance path for allowing sheets to pass said shoulder surface without the leading edge thereof being directed toward said shoulder surface;
  • a sensing means for sensing the position of sheets traveling along said sheet entrance path
  • a motivating means coupled to said sensing means for selectively moving said stop means into and out of said sheet entrance path in response to said sensing means sensing the locations of said sheets.
  • said sensing means is positioned downstream of said shoulder surface for sensing when a sheet has entered said sheet processing apparatus to a predetermined extent at which said sheet processing apparatus is prepared to receive an additional sheet and for sensing when the leading edge of a sheet is beyond said shoulder surface;
  • said motivating means is for selectively moving said stop means out of said sheet entrance path in re sponse to a signal from said sensing means indicating that said sheet processing apparatus is prepared to receive a sheet and into said sheet entrance mouth in response to a signal from said sensing means indicating that a leading edge is beyond said shoulder surface.
  • a sheet-feed control mechanism as claimed in claim 2 wherein said sheet processing apparatus includes a pair of opposing rollers positioned downstream of said shoulder surface and wherein said sensing means senses the presence of sheets at the nip of said roller pair with said motivating means moving said stop means out of said sheet entrance path when said sensing means does not sense the presence of a sheet at said roller nip and moving said stop means into said sheet entrance path when said sensing means senses the presence of a sheet at said roller nip.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Holders For Sensitive Materials And Originals (AREA)
  • Registering Or Overturning Sheets (AREA)
US472743A 1974-05-23 1974-05-23 Sheet limiter Expired - Lifetime US3888478A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US472743A US3888478A (en) 1974-05-23 1974-05-23 Sheet limiter
GB2149975A GB1464513A (en) 1974-05-23 1975-05-20 Feeding of sheets
DE19752522664 DE2522664A1 (de) 1974-05-23 1975-05-22 Steuermechanismus fuer die zufuehrung von boegen, blaettern oder karten
JP50062419A JPS515017A (de) 1974-05-23 1975-05-23

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US472743A US3888478A (en) 1974-05-23 1974-05-23 Sheet limiter

Publications (1)

Publication Number Publication Date
US3888478A true US3888478A (en) 1975-06-10

Family

ID=23876771

Family Applications (1)

Application Number Title Priority Date Filing Date
US472743A Expired - Lifetime US3888478A (en) 1974-05-23 1974-05-23 Sheet limiter

Country Status (4)

Country Link
US (1) US3888478A (de)
JP (1) JPS515017A (de)
DE (1) DE2522664A1 (de)
GB (1) GB1464513A (de)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030409A (en) * 1973-01-26 1977-06-21 Addressograph Multigraph Corporation Printing apparatus controls
US4078791A (en) * 1977-03-15 1978-03-14 International Business Machines Corporation Gate mechanism for a copier machine
US4082263A (en) * 1975-06-30 1978-04-04 International Business Machines Corporation Document feeding apparatus
US4233800A (en) * 1978-12-20 1980-11-18 Amer-O-Matic Corporation Envelope opener
US4256298A (en) * 1979-01-08 1981-03-17 Eastman Kodak Company Self-compensating registration mechanism
US4391510A (en) * 1980-07-30 1983-07-05 Xerox Corporation Voice coil actuator registration system
US4442769A (en) * 1981-12-24 1984-04-17 Ncr Corporation Staging apparatus used in a sheet feeding environment
US4557473A (en) * 1983-12-14 1985-12-10 Ncr Canada Ltd. - Ncr Canada Ltee Sheet decelerating and stopping apparatus
US4591144A (en) * 1985-01-28 1986-05-27 Godlewski Edward S Feeder for press
US4614867A (en) * 1983-07-01 1986-09-30 De La Rue Systems Limited Sheet sensing apparatus with photoelectrically detected resiliently mounted nip roller
US4768771A (en) * 1982-08-02 1988-09-06 Xerox Corporation Sheet feeder with retractable gate
US4936568A (en) * 1989-02-08 1990-06-26 Pitney Bowes Inc. Control circuit for single revolution means
US4943174A (en) * 1988-05-13 1990-07-24 U.S. Philips Corporation Arrangement for position indication of an edge of a sheet-shaped data carrier
US5074545A (en) * 1985-01-22 1991-12-24 Sharp Kabushiki Kaisha Device for preventing the transport of poorly aligned copy paper
US5167374A (en) * 1991-02-09 1992-12-01 Geha-Werke Gmbh Paper shredder with switch-off retardation
US5566932A (en) * 1994-09-15 1996-10-22 Pitney Bowes Inc. Apparatus and method for deskewing sheets
US20030090050A1 (en) * 2001-11-09 2003-05-15 Hideki Sueoka Paper feeding device and sheet carrying device
US6634729B1 (en) 2002-06-12 2003-10-21 J.M. Huber Corporation Apparatus for applying ink indicia to boards
US20090074549A1 (en) * 2007-09-13 2009-03-19 Jan Binder Device for receiving and for transporting an article

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4934533A (de) * 1972-07-31 1974-03-30
DE3830260A1 (de) * 1988-09-06 1990-03-15 Roland Man Druckmasch Bogenanlegevorrichtung, insbesondere fuer bogendruckmaschinen
JP2637580B2 (ja) * 1989-12-08 1997-08-06 ダイハツ工業株式会社 高品質３ｃ１ｂ塗装方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638344A (en) * 1950-07-31 1953-05-12 Thomas E Hayes Paper money counting machine
US3108800A (en) * 1960-12-30 1963-10-29 Int Computers & Tabulators Ltd Sheet aligning apparatus
US3244417A (en) * 1964-03-06 1966-04-05 Int Standard Electric Corp Punched-card insertion apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2638344A (en) * 1950-07-31 1953-05-12 Thomas E Hayes Paper money counting machine
US3108800A (en) * 1960-12-30 1963-10-29 Int Computers & Tabulators Ltd Sheet aligning apparatus
US3244417A (en) * 1964-03-06 1966-04-05 Int Standard Electric Corp Punched-card insertion apparatus

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4030409A (en) * 1973-01-26 1977-06-21 Addressograph Multigraph Corporation Printing apparatus controls
US4082263A (en) * 1975-06-30 1978-04-04 International Business Machines Corporation Document feeding apparatus
US4078791A (en) * 1977-03-15 1978-03-14 International Business Machines Corporation Gate mechanism for a copier machine
US4233800A (en) * 1978-12-20 1980-11-18 Amer-O-Matic Corporation Envelope opener
US4256298A (en) * 1979-01-08 1981-03-17 Eastman Kodak Company Self-compensating registration mechanism
US4391510A (en) * 1980-07-30 1983-07-05 Xerox Corporation Voice coil actuator registration system
US4442769A (en) * 1981-12-24 1984-04-17 Ncr Corporation Staging apparatus used in a sheet feeding environment
US4768771A (en) * 1982-08-02 1988-09-06 Xerox Corporation Sheet feeder with retractable gate
US4614867A (en) * 1983-07-01 1986-09-30 De La Rue Systems Limited Sheet sensing apparatus with photoelectrically detected resiliently mounted nip roller
US4557473A (en) * 1983-12-14 1985-12-10 Ncr Canada Ltd. - Ncr Canada Ltee Sheet decelerating and stopping apparatus
US5074545A (en) * 1985-01-22 1991-12-24 Sharp Kabushiki Kaisha Device for preventing the transport of poorly aligned copy paper
US4591144A (en) * 1985-01-28 1986-05-27 Godlewski Edward S Feeder for press
US4943174A (en) * 1988-05-13 1990-07-24 U.S. Philips Corporation Arrangement for position indication of an edge of a sheet-shaped data carrier
US4936568A (en) * 1989-02-08 1990-06-26 Pitney Bowes Inc. Control circuit for single revolution means
US5167374A (en) * 1991-02-09 1992-12-01 Geha-Werke Gmbh Paper shredder with switch-off retardation
US5566932A (en) * 1994-09-15 1996-10-22 Pitney Bowes Inc. Apparatus and method for deskewing sheets
US20030090050A1 (en) * 2001-11-09 2003-05-15 Hideki Sueoka Paper feeding device and sheet carrying device
US6955351B2 (en) * 2001-11-09 2005-10-18 Ricoh Company, Ltd. Paper feeding device and sheet carrying device
US6634729B1 (en) 2002-06-12 2003-10-21 J.M. Huber Corporation Apparatus for applying ink indicia to boards
US20090074549A1 (en) * 2007-09-13 2009-03-19 Jan Binder Device for receiving and for transporting an article
US7648328B2 (en) * 2007-09-13 2010-01-19 Multivac Sepp Haggenmueller Gmbh & Co. Kg Device for receiving and for transporting an article

Also Published As

Publication number Publication date
JPS515017A (de) 1976-01-16
GB1464513A (en) 1977-02-16
DE2522664A1 (de) 1975-12-04

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