US3503603A - Friction feed device - Google Patents

Friction feed device Download PDF

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Publication number
US3503603A
US3503603A US708557A US3503603DA US3503603A US 3503603 A US3503603 A US 3503603A US 708557 A US708557 A US 708557A US 3503603D A US3503603D A US 3503603DA US 3503603 A US3503603 A US 3503603A
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US
United States
Prior art keywords
roller
document
rollers
stack
friction
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
US708557A
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English (en)
Inventor
Thomas Dvorak
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
Application granted granted Critical
Publication of US3503603A publication Critical patent/US3503603A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K13/00—Conveying record carriers from one station to another, e.g. from stack to punching mechanism
    • G06K13/02—Conveying record carriers from one station to another, e.g. from stack to punching mechanism the record carrier having longitudinal dimension comparable with transverse dimension, e.g. punched card
    • G06K13/08—Feeding or discharging cards
    • G06K13/10—Feeding or discharging cards from magazine to conveying arrangement
    • G06K13/103—Feeding or discharging cards from magazine to conveying arrangement using mechanical means

Definitions

  • a third reversely driven friction roller located on the stack side of the document transport path and down the path from the second friction roller acts to shear from the lead document any subsequent documents.
  • This invention relates in general to a document feeder mechanism and in particular to an economical yet reliable mechanism for feeding documents such as business machine cards from a stack.
  • means are provided to feed documents one at a time from a stack into a document transport mechanism.
  • the documents are preliminarily separated at the stack by moving the trailing edge of the lead document of the stack with a higher velocity than the leading edge of the document.
  • This action causes the lead document to bow outwardly from the stack and thus provides means for separating the documents in the stack.
  • this action is obtained through the use of a pair of friction rollers one of which is located near the trailing edge of the stack and the other of which is located near the leading edge of the stack.
  • the trailing edge friction roller is driven so as to provide a higher peripheral velocity than the leading edge friction roller.
  • a third continuously driven counter rotating friction roller located on the stack side of the document transport path and down the path from the leading edge friction roller acts to shear away from the lead document any subsequent documents which might cling to the lead document.
  • an idler roller is located adjacent to the third roller and is arranged so that as the card or document leaves the stack it will pass between the idler and third roller and the idler will cause a partial wrap of the document around the third roller thereby providing a large surface of engagement between the document and the third roller. This will assist the third roller in stripping the subsequent document from the lead document and Will permit the third roller to drive the subsequent document back into the stack,
  • FIGURE 1 shows a top elevational view of one embodiment of the invention
  • FIGURE 2 shows a side elevational view of FIGURE 1
  • FIGURE 3 is an underside view of the structure shown in FIGURE 1 and shows one typical arrangement for utilizing a belt drive for the various rollers in FIGURE 1.
  • 10 represents a base plate which may form part of the supporting structure of a card reader, a card punch, a sorter or etc. in which the present invention can be utilized.
  • the base plate 10 would be mounted horizontally in the structure.
  • a document hopper 11 which may comprise upstanding sidewalls 12 and 13 and rear wall 14.
  • the bottom of the hopper 11 may be formed by the base plate 10 and may include as an example a pair of guide channels 15 and 16 on which a document feed pressure plate 17 is guided.
  • the guide plate 17 may be spring loaded by means, not shown, so as to urge the documents represented at 18 toward the open end of the hopper 11.
  • the friction rollers 19 and 20 each comprises a metal shaft 19a and 20a on which has been bonded a high coetficient of friction material such as natural rubber.
  • the shafts 19a and 20a are vertically supported on the base plate 10 by suitable bearing means 1% and 20b.
  • the ends of the rollers 19 and 20 terminate on the underside of base plate 10 in a pair of pulley members and 20c.
  • the pulleys 19c and 20c are linked by a common belt member shown in FIGURE 3 as 20d.
  • the counter rotating stripping roller is shown in FIG- URES l and 2 at 21 and this roller may be preferably made from a plastic material having a coelficient of friction somewhat smaller than the rollers 19 and 20.
  • Roller 21 also includes a shaft member 21a which is journaled in a bearing 21b in the base plate 10. Roller 21 like rollers 19 and 20 terminates on the underside of base plate 10 in a pulley member 210.
  • the idler roller is shown in the drawings at 22 and is mounted on an adjustable carriage 23 which has screw adjustments 24 located in the base thereof to permit the idler roller 22 to be adjusted along a center line which parallels the vertical center line of roller 21 as viewed in FIGURE 1. In practice the clearance between the idler 22 and roller 21 may be adjusted to be about 2 card thicknesses.
  • rollers 25 and 26 Positioned down the document feed path from the reverse roller 21 and idler 22 are a pair of rollers 25 and 26 which may represent the initial gripping rollers of a document transport system not shown. Each of these rollers 25 and 26 is vertically supported as indicated in FIGURE 2 on the base plate 10 and roller 26 which may be considered as the driven roller of the pair includes a pulley member 26a.
  • the gripping drive roller 26 and the continuously rotating stripping roller 21 may both be driven from a common belt member as shown at 27 in FIGURE 3.
  • the common belt 27 loops around a drive pulley indicated at 28 which may be driven by a motor, not shown, then around the gripping drive roller pulley 26a, then around idler pulley 29, then partially wrapped around the counter rotating roller pulley 210 back to the drive pulley 28.
  • a solenoid actuated snub roller as shown in FIGURES 1 and 3 at 32 may be driven by a solenoid 33 into wedging engagement with counter rotating pulley 21c and the pulley 190 of roller 19. This may be done by energizing the solenoid 33 with a control pulse applied to terminal 34 from a control'system, not shown.
  • roller 32 Upon energization of the solenoid 33, roller 32 will transfer the motion of the belt 27 to the pulley 190 to cause .roller 19 and hence" roller 20 to rotate As better shown in FIGURE 3 the diameter of the pulley 190 is larger than the diameter of pulley 20c so that the roller 20 will rotate with a higher peripheral velocity than roller 19.
  • the solenoid 33 is deenergized. At this time the gripping rollers 25 and 26 pulls the card from the stack and feeds it into the transport system.
  • a leading edge detector may be located in the vicinity of the rollers 25 and 26 to detect the presence of the document and deenergize the solenoid 33.
  • the solenoid 33 can be energized by a control pulse of suitable duration which will bring the lead document to a point of engagement with the gripping rollers 25 and 26 and at that point automatically terminatel
  • means may be provided for declutching rollers 19 and 20. This may be accomplished by coupling pulley 190 to shaft 19a by a standard type one way clutch.
  • the document leaving the stack follows a somewhat serpentine path and the purpose of this path is to cause the document to partially wrap-around the counter rotating roller 21 to thereby assure good stripping action thereby.
  • This serpentine path is achieved as follows: the rollers 19, 20,.21 and 22 all have diameters and locations such that a line drawn tangent acrossthe tops of rollers 19 and 20 as viewed in FIGURE 1 will lie between a similar line drawn tangent to the bottom of roller 21 and the center of roller 21. Likewise a similar tangent line drawn across the top of idler 22 will lie between the center of roller 21. and the aforementioned roller 21 tangent line. By so locating the .rollers the document being fed from the stack will wrap partially around the roller 21 as indicated.
  • rollers 19 and 20 each had an outside diameter of .950 inch while pulley 190 had a diameter of .620 inch and pulley 20c had a diameter of .535 inch.
  • the diameter'of roller 21 was .750 inch and of roller 22 was .750 inch.
  • the horizontal center lines of rollers 19 and 20 as viewed in FIGURE 1 were vertically displaced downward .733 inch from the horizontal center line of roller 21. Continuing as viewed in-FIGURE 1 the vertical center line of roller 21 was displaced .772 inch from thevertical center line of roller 19 and .223 inch from the vertical center line of roller 22.
  • the pressure or feed plate includes a nub or rib-like protrusion 17a' which is posiway between the rollers 19 and 20.
  • This rib 17a acts to concentrate the pressure of the plate"17 on the'docur'nents at a point essentially midway between the rollers 19 and 20 thereby assuring a good gripping action of these roller s with the documents.
  • a bow limit plate 35 is located between the rollers 19 and 20 to prevent the documents from being pushed out of the hopper 11 by the bowing action of rollers 19 and 20.
  • a document feeder mechanism for feeding documents one at a time from a stack of documents comprising, a first friction roller adapted to continuously engage a document stack near the trailing edge thereof, a second friction roller adapted to continuously engage the document stack near its leading edge, and drive means selectively coupled to said first and second rollers for Simultaneously driving said rollers in similar directions, said drive means including a means for causing said first roller to impart a higher velocity to the lead document in the stack than the second roller and thereby to cause the lead 7 document to bow outwardly from the stack.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
US708557A 1968-02-27 1968-02-27 Friction feed device Expired - Lifetime US3503603A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US70855768A 1968-02-27 1968-02-27

Publications (1)

Publication Number Publication Date
US3503603A true US3503603A (en) 1970-03-31

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ID=24846276

Family Applications (1)

Application Number Title Priority Date Filing Date
US708557A Expired - Lifetime US3503603A (en) 1968-02-27 1968-02-27 Friction feed device

Country Status (4)

Country Link
US (1) US3503603A (de)
DE (1) DE1908397B2 (de)
FR (1) FR2002686A1 (de)
GB (1) GB1258961A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857558A (en) * 1973-06-21 1974-12-31 Xerox Corp Paper cassette design with irregular bottom
US4444385A (en) * 1982-01-18 1984-04-24 Qume Corporation Sheet feeder
US5630581A (en) * 1996-01-05 1997-05-20 Rodesch Associates, Inc. Apparatus for dispensing lightweight sheet-style articles from a stacked supply of articles
US20070235923A1 (en) * 2006-04-05 2007-10-11 Keller James J Sheet feeder, feed roller system and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932551A (en) * 1958-09-12 1963-07-31 Block & Anderson Ltd Improvements in or relating to paper and like sheet separating devices

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB932551A (en) * 1958-09-12 1963-07-31 Block & Anderson Ltd Improvements in or relating to paper and like sheet separating devices

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857558A (en) * 1973-06-21 1974-12-31 Xerox Corp Paper cassette design with irregular bottom
US4444385A (en) * 1982-01-18 1984-04-24 Qume Corporation Sheet feeder
US5630581A (en) * 1996-01-05 1997-05-20 Rodesch Associates, Inc. Apparatus for dispensing lightweight sheet-style articles from a stacked supply of articles
US20070235923A1 (en) * 2006-04-05 2007-10-11 Keller James J Sheet feeder, feed roller system and method

Also Published As

Publication number Publication date
GB1258961A (de) 1972-01-05
DE1908397A1 (de) 1970-02-12
DE1908397B2 (de) 1971-12-16
FR2002686A1 (de) 1969-10-31

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