US3746333A - Paper sheet feed control device for printing machines duplicators andmachines for the treatment of sheets in general - Google Patents

Paper sheet feed control device for printing machines duplicators andmachines for the treatment of sheets in general Download PDF

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Publication number
US3746333A
US3746333A US00149933A US3746333DA US3746333A US 3746333 A US3746333 A US 3746333A US 00149933 A US00149933 A US 00149933A US 3746333D A US3746333D A US 3746333DA US 3746333 A US3746333 A US 3746333A
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United States
Prior art keywords
sheet
roller
sheets
shaft
thickness
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Expired - Lifetime
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US00149933A
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English (en)
Inventor
F Capetti
G Terzuolo
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Olivetti SpA
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Olivetti SpA
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    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/19—Specific article or web
    • B65H2701/1912—Banknotes, bills and cheques or the like

Definitions

  • a paper-sheet feed control device including a feeler member for detecting oversize sheets of paper or simultaneous feeding of two or more sheets, [30] Forelgn Application Pnonty Data and means to reject these sheets responsive to signals June 5, 1970 Italy 68922 A/70 from the feeler member
  • the feeler member includes a roller integral with a movable member of a thickness [52] U.S. Cl.
  • the thickness of the sheets to be controllably fed by the device must be set by the adjustment of a feeler member. This adjustment requires great care and a rather long time, particularly for paper of very reduced thickness.
  • the thickness of the sheets may be on the order of a few hundredthsof one millimeter.
  • the aforementioned adjustment must be made each timethe thickness of the sheets to be fed varies.
  • the object of the invention is to avoid the disadvantages enumerated above.
  • the present invention provides a sheet-feed control device which does not require a long and complicated manual adjustment at the start of each printing operation, or when changing from one kind of paper to another.
  • the paper-sheet control device of the invention is characterized in that a sheet feeler member is provided which can be automatically adjusted according to a standard sheet thickness to emit a signal when a sheet is fed whose thickness is substantially greater than the standard thickness.
  • a sheet of greater than standard thickness may comprise two or moresheets fed simultaneously.
  • the adjustment of the device to a particular sheet thickness may be accomplished by using a sheet drawn from the same pile, which is inserted between a pair of members which form a simple thickness gauge.
  • the feeler member of the device comprises a small roller mounted on a pin which is integral with a movable member of the thickness gauge, the small roller being rotated by friction with a limited stroke against the bias of a spring.
  • a finger integral with the small roller closes a micro-switch, activating means to reject the erroneously fed sheet.
  • FIG. 1 is a partial longitudinal section of a machine including a paper-sheet feed control device according to the invention
  • FIG. 2 is a partial plan view of the device of FIG. I;
  • FIG. 3 is a partial section along the line Ill-Ill of FIG. 2;
  • FIG. 4 is a partial view, taken along the line lV-IV of FIG. 2.
  • the sheet feeder is incorporated in a printing machine which must operate at high speed and with great precision.
  • the machine includes a stationary frame comprising a base plate 5 (FIG. 1), to'which two side plates 6 are connected (FIG. 2), which are in turn connected to one another by means of transverse structures not shown in the drawings.
  • a printing station is provided, comprising the conventional impression cylinder and the inking rollers, not shown in the drawings.
  • the sheet feeder comprises a sheet feeding table 7 (FIG. 1) adapted to support a pile of sheets 8 to be fed and disposed at a slight angle to the horizontal.
  • the table 7 is of bent steel plate and comprises two trapezoidal sides 9, each of which includes a rectangular portion 11.
  • On the two C-shaped guides there are fastened two folds 16 of a transverse plate 17 which serves as a stop for the pile of sheets 8.
  • each side 9 of table 7 there is further fastened a nut screw or female thread 18 which meshes with a corresponding screw 19'(FIG. l) disposed vertically and adapted to rotate between the two plates 5 and 14 of the stationary frame of the machine.
  • a worm wheel 21 which meshes with a corresponding worm wheel 22.
  • the two worm wheels 22 (FIG. 2) are fastened to a common transverse shaft 23 which, upon feeding of the sheets 8, can be caused to rotate in a known manner, under the control of a feeler of the height of the pile of sheets 8 (FIG. 1 not shown in the drawings, thereby keeping the uppermost sheet 8 of the pile at a substantially constant height.
  • the sheet feeder further comprises a set of sheetdrawing devices or vacuum suckers 24 fastenedto a hollow shaft 25, which is caused to move cyclically to cause the vacuum suckers 24 to first approach the pile of sheets 8. After generating a vacuum in the suckers 24 through the hollow shaft 25, the latter is displaced so that the suckers 24 carry the sheets to the feedin device proper.
  • the device for feeding the sheets 8 comprises an alignment and delivery table generally indicated by the reference numeral 26.
  • This table is adapted to bring the sheet to be printed against one or more references, to align the sheet both transversely and longitudinally.
  • the alignment and delivery table 26 comprises a pair of small rollers 27 and 28 fastened, respectively, to two shafts 29 and 31 revolvingon the plates 6, and a set of belts 32 (FIG. 2) running on the rollers 27 and 28.
  • the sheet 8 is further pressed against the belts 32 by means of rollers 33 and is guided by the stationary plates 34 (FIG. 1).
  • a pulley 36 (FIG. 2) which is connected, through a toothed belt 37, with a second pulley 38.
  • This pulley is secured to another shaft 39, which revolves on the plates 6 and carries an entrainment roller 41 of a material with a high coefficient of friction, for instance rubber.
  • the roller 41 cooperates with a set of small pressure rollers 42, also made of a material with a high coefficient of friction.
  • Each roller 42 is adapted to rotate on a pin 43 carried by a bridge arm 44, which is adapted to rotate about a transverse shaft 46; this shaft is, in turn, rotatably mounted on the plates 6.
  • a set of members or cranks 47 is associated with the arms 44.
  • Each crank 47 is fastened to the shaft 46 in correspondence with the arm 44 associated therewith and is provided with a tab 48 which carries a pin 49 (FIG. 1).
  • This pin constitutes a stop for a screw 51 adjustably secured to the cross member 52 of the corresponding bridge arm 44.
  • the screw 51 is normally biased against the pin 49 by a spring 53 stretched between the tab 48 and the cross member 52.
  • a lever 54 carrying a small roller 56 which is urged by a spring 57 into cooperation with a cam 58 secured to a shaft 59.
  • Means are thereby provided for causing shaft 46 to oscillate cyclically in a manner disclosed more fully below.
  • -Shaft 59 is the main shaft of the machine and is rotated continuously during the printing operation, thereby determining the feeding cycle.
  • the shaft 29 is in turn rotated in a known manner with a certain ratio relative to the shaft 59, thereby determining the delivery cycle.
  • the feeding device further comprises a feeler member contacting the sheet being fed, which member can be automatically adjusted according to the standard thickness of the sheet.
  • the feeler member comprises a small metallic roller 61 (FIG. 3) having the same diameter as the rollers 42 and adapted to cooperate with the roller 41.
  • the small roller 61 is mounted on a pin 62 by means of a roller bearing 64.
  • the pin 62 is carried by another arm 63 secured to the shaft 46 and 7 having the same length as the arms 44.
  • a second peg 69 directed radially and adapted to act upon a small lever 71 which actuates a microswitch 72.
  • the lever 71 is provided with an appropriate spring which normally holds it in the position shown in FIG. 3, whereby the peg 66 abuts against the lower edge of the hole 67.
  • the microswitch 72 when actuated, energizes an electromagnet 73 (FIG. 1), whose keeper 74 has a pinand-hole connection with an arm 78 pivotally mounted on a pin 77.
  • a bar 81 is secured to the arm 76 and to another arm 78 (FIG. 2) pivotally mounted on a pin 79 which is coaxial with the pin 77.
  • Another bar 82 which is stationary, constitutes, together with the bar 81, a guide for the sheets to be fed to the alignment table 26. Further, the bar 81 is a deflecting means for the sheets 8 erroneously fed.
  • two stationary plates 80 define a container for the rejected sheets.
  • the screw 87 is adapted to cooperate with a member, formed by a plate 88, which engages, by means of a tab 89, in a cutout of a counterelement comprising a stationary plate 91.
  • the plate 88 is biased towards the plate 91 by a U-shaped resilient member 92.
  • the two plates 88 and 91 are disposed in a position easily accessible to the operator, and each includes one bent end, 93 and 94 respectively, to ease the opening of the plate 88 and the insertion of a sheet of known thickness in the space defined between the two plates.
  • the screw 87 is adjusted so that, with the cam 58 in the position shown in FIG. 1, when the plate 88 (FIG. 4) abuts against the plate 91, the small roller 61 (FIG. 3) slightly skims over the roller 41.
  • the screws 51 (FIG. 2) are adjusted to leave a small space between the screws 51 and the corresponding pins 49 for the same position of the cam 58.
  • the small roller 61 In order to adjust the small roller 61 according to a sheet of standard thickness, it is sufficient for the operator to insert, between the plates 88 and 91, a piece of one of the sheets 8 disposed on the plate 7. Due to the greater length of the arm 63 relative to the arm 84, the small roller 61 is removed from the roller 41 by a distance which is slightly greater than the thickness of the sheet 8, but less than twice this thickness. The small roller 56 (FIG. 1) in turn remains slightly removed from the lowermost point of the cam 58.
  • both the main shaft 59 and the shaft 29 of the table 26 are caused to rotate, whereby on the one hand the shaft 39 is rotated and, on the other hand, the roller 28 is caused to rotate through the roller 27 and the belts 32.
  • the cam 58 will first cause the lever 5 4to rotate in a counterclockwise direction together with the shaft 46, the arms 63 (FIG. 3) and 84 (FIG. 2) as well as the cranks 47.
  • the pins 49 of the cranks 47 engage the screws 51, thus entraining the arms 44, whereby both the feeler roller 61 and the pressure rollers 42 are removed from the entrainment roller 41.
  • cam 58 allows the lever 54 to rotate clockwise together with the shaft 46 (FIG. 2), the arms 63 and 84 and the cranks 47.
  • the rotation of the shaft 46 stops when the screw 87 (FIG. .4) abuts against the plate 88.
  • the small roller 61 (FIG. 3) is not able to reach the surface of the sheet 8, while the small roller 42 (FIG. 1) rests upon the sheet 8 by the action of the springs 53.
  • the sheet 8 is then sent between the bars 77 and 82 and subsequently between the small rollers 33 and the belts 32.
  • the sheet 8 is thus fed to the machine by the belts 32 themselves, while the cam 58 again removes the small rollers 42 and 61 from the roller 41 to receive the subsequent sheet 8.
  • the lever 71 now actuates the microswitch 72, which energizes the electromagnet 73.
  • the latter rotates the arm 76 counterclockwise, together with the bar 81 and the arm 78.
  • the bar 81 is thus brought to the position shown hatched in FIG. 1 and prevents the incoming sheet or sheets from entering between the small roller 33 and the belts 32.
  • the incoming sheets 8 are instead sent into the compartmentdefined by the plates 80 and are thus rejected.
  • the feelermember 61 which feels the sheet 8 fed by the device automatically responds to the thickness of the sheet to deliver, through the microswitch 72, a signal when two or more sheets 8 are fed simultaneously or when a sheet whose thickness is substantially greater than the standard thickness is fed.
  • the adjustment of the automatic device is effected by inserting a sheet, taken from the pile, between a member 88 integral with the feeler member and a counterelement 91.
  • control device described can be incorporated in a sheet feeder of a printing machine, wherein the sheet is drawn from the pile in close proximity to its rear edge, so that the sheets fed are partially superimposed along the path followed.
  • the small roller 42 abuts against the roller 41, then two or more sheets enter in the nip between the rollers.
  • an equal number of sheets are to be disposed between the plates 88 and 91 so that the device is properly adjusted for automatic operation.
  • a paper-sheet feed control device for controllably feeding each standard thickness sheet of a plurality of sheets from a pile, including an element and a counterelement defining a measuring space wherein one of said standard thickness sheets is inserted, means for adjustably biasing said element against said counter-clement thereby effecting measurement of the thickness of said standard sheet, a sheet feeler member connected with said element to contact a fed sheet whose thickness is greater than said standard thickness and means coupled to said sheet feeler member and responsive to said contact between said feeler member and said greater than standard thickness sheet for emitting a signal indicating said contact.
  • a device as claimed in claim 1, wherein said member comprises a feeler roller pinned to a mounting integral with said element, said roller being frictionally entrained on the sheet of greater than standard thickness.
  • said signal emitting means includes a microswitch, said device including a finger integral with said. roller and normally spaced from said microswitch so that said finger triggers said microswitch upon rotation of said roller due to frictional entrainment of said roller on said greater than standard thickness sheet.
  • a device as claimed in claim 3 including a container for said greater than standard sheets and a defiection member driven through said microswitch to a position to deflect said greater than standard thickness sheet to said container.
  • a paper-sheet feed control device for controllably feeding each standard thickness sheet of a plurality of sheets from a pile, including an element and a counterelement defining a measuring space wherein one of said standard thickness sheets is inserted, biasing means for biasing said element against said counter-element thereby effecting measurement of the thickness of said standard sheet, a feeler secured to a first arm, a second arm carrying an end part contacting said element, said arms being bodily rotatable on a common shaft, the distance of said end part from said shaft being greater than the distance of said feeler from said shaft to such an extent as to allow free passage of one standard thickness sheet and to cause said arms to be rotated on said shaft by the passage of at least two superimposed sheets.
  • a paper-sheet feed control device for controllably feeding each standard thickness sheet of a plurality of sheets from a pile, including an element and a counterelement defining a measuring space wherein one of said standard thickness sheets is inserted, biasing means for biasing said element against said counter-element thereby effecting measurement of the thickness of said standard sheet, a feeler roller pinned to a first arm, a second arm integral with said first arm by being fastened to a shaft common to said first and second arms, a screw carried by said second anfi and cooperating with said element to adjust said measuring space, the
  • a device as claimed in claim 6, including a common feed driving roller, and a plurality of pressure rollers resiliently biased against said driving roller to feed said sheet, and wherein said feeler roller rotates on an axis substantially parallel to the axes of said pressure rollers and cooperates with said common roller to feel the sheet being fed.
  • a device as claimed in claim 7, including a plurality of bridge arms rotatably mounted on said common shaft, each of said arms carrying one of said pluraltiy of pressure rollers, the length of each of said bridge arms between said pressure roller and said shaft being substantially equal to the length of said first arm, and a pluralityof crank members fixed to said shaft and en gaging said bridge arms to remove said pressure rollers from said common feed roller in response to revolution of said shaft.
  • a device as claimed in claim 8 including means for cyclically feeding one of the sheets of said pile to the common feed roller of said device and means for causing said shaft to oscillate cyclically, said crank members being responsive to said cyclic oscillations to bring said pressure rollers and feeler member roller into cooperation with said common roller in a predetermined stage of the cycle.

Landscapes

  • Controlling Sheets Or Webs (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Pile Receivers (AREA)
US00149933A 1970-06-05 1971-06-04 Paper sheet feed control device for printing machines duplicators andmachines for the treatment of sheets in general Expired - Lifetime US3746333A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT6892270 1970-06-05

Publications (1)

Publication Number Publication Date
US3746333A true US3746333A (en) 1973-07-17

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ID=11310926

Family Applications (1)

Application Number Title Priority Date Filing Date
US00149933A Expired - Lifetime US3746333A (en) 1970-06-05 1971-06-04 Paper sheet feed control device for printing machines duplicators andmachines for the treatment of sheets in general

Country Status (6)

Country Link
US (1) US3746333A (enrdf_load_stackoverflow)
JP (1) JPS548940B1 (enrdf_load_stackoverflow)
CA (1) CA937955A (enrdf_load_stackoverflow)
DE (1) DE2127757C3 (enrdf_load_stackoverflow)
FR (1) FR2095941A5 (enrdf_load_stackoverflow)
GB (1) GB1348316A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021030A (en) * 1975-07-15 1977-05-03 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Sheet feed method and apparatus
US4579334A (en) * 1983-11-21 1986-04-01 Ncr Corporation Apparatus for indicating the status of sheets
USD529122S1 (en) 2004-11-22 2006-09-26 Petranoff Thomas A Javelin

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3007248C2 (de) * 1980-02-27 1982-10-21 Mabeg Maschinenbau Gmbh Nachf. Hense & Pleines Gmbh & Co, 6050 Offenbach Mehrfachbogenkontrollvorrichtung
DE3118010C2 (de) * 1981-05-07 1984-10-18 Mabeg Maschinenbau Gmbh Nachf. Hense & Pleines Gmbh & Co, 6050 Offenbach Mehrfachbogenkontrollvorrichtung
DE3613969A1 (de) * 1986-04-24 1987-10-29 Heidelberger Druckmasch Ag Ueberwachungsvorrichtung fuer die geschuppte bogenzufuhr zu druckmaschinen
DE3730683A1 (de) * 1987-09-12 1989-03-23 Gremser Masch Franz Verfahren und vorrichtung zur kontrolle von gegenstaenden
DE10024018B4 (de) * 2000-05-16 2006-05-24 Man Roland Druckmaschinen Ag Vorrichtung zum Bilden eines Bogenstroms von sich schuppenartig teilweise überdeckenden Bogen

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2890884A (en) * 1953-10-12 1959-06-16 Lewfor Dev Corp Multiple sheet electing mechanism
DE953172C (de) * 1955-02-19 1956-11-29 Falz Und Heftmaschinenwerk Lei Kontrollvorrichtung fuer Bogenanleger
DE1088070B (de) * 1959-01-16 1960-09-01 Mabeg Maschb G M B H Vorrichtung zum Aussondern von Doppel-Bogen beim Zufuehren von Bogen zu bogenverarbeitenden Maschinen
JPS4421825Y1 (enrdf_load_stackoverflow) * 1968-01-22 1969-09-16
GB1214379A (en) * 1968-03-22 1970-12-02 Internat Computers Ltd Formerl Improvements in or relating to error indicating devices in document feeding
US3593989A (en) * 1969-03-11 1971-07-20 Harris Intertype Corp Turned corner and multiple sheet detector
DE6911412U (de) * 1969-03-21 1969-12-11 Agfa Gevaert Ag Doppelblattsperre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021030A (en) * 1975-07-15 1977-05-03 Veb Polygraph Leipzig Kombinat Fur Polygraphische Maschinen Und Ausrustungen Sheet feed method and apparatus
US4579334A (en) * 1983-11-21 1986-04-01 Ncr Corporation Apparatus for indicating the status of sheets
USD529122S1 (en) 2004-11-22 2006-09-26 Petranoff Thomas A Javelin

Also Published As

Publication number Publication date
DE2127757C3 (de) 1982-05-27
DE2127757B2 (de) 1975-03-06
DE2127757A1 (de) 1971-12-09
JPS548940B1 (enrdf_load_stackoverflow) 1979-04-19
FR2095941A5 (enrdf_load_stackoverflow) 1972-02-11
CA937955A (en) 1973-12-04
GB1348316A (en) 1974-03-13

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