US3589286A - Device for feeding curled sheet material - Google Patents

Device for feeding curled sheet material Download PDF

Info

Publication number
US3589286A
US3589286A US817862A US3589286DA US3589286A US 3589286 A US3589286 A US 3589286A US 817862 A US817862 A US 817862A US 3589286D A US3589286D A US 3589286DA US 3589286 A US3589286 A US 3589286A
Authority
US
United States
Prior art keywords
master
guideway
sheet
cylinder
blade means
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
US817862A
Other languages
English (en)
Inventor
Eugene A Acks
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.)
AB Dick Co
Original Assignee
Multigraphics Inc
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 Multigraphics Inc filed Critical Multigraphics Inc
Application granted granted Critical
Publication of US3589286A publication Critical patent/US3589286A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/36—Article guides or smoothers, e.g. movable in operation
    • B65H5/38—Article guides or smoothers, e.g. movable in operation immovable in operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41L—APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING OR PRINTING FOR OFFICE OR OTHER COMMERCIAL PURPOSES; ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES
    • B41L19/00—Duplicating or printing apparatus or machines for office or other commercial purposes, of special types or for particular purposes and not otherwise provided for

Definitions

  • ABSTRACT A device for uncurling sheet material, such as moist duplicating masters, includes a pair of blades having diverging outer edges disposed just above a guideway for introducing master sheets.
  • the fingers extend from approximately the center of the sheet guideway diagonally to its side edges so that as the sheet is moved along the guideway it is progressively uncurled and flattened.
  • Retainer strips overlie the margins of the flattened sheet after it leaves the blades to maintain the sheet in its flattened condition to facilitate its attachment to the master cylinder of a. duplicating machine.
  • This invention relates to the feeding or advancing of sheet material and particularly material which has become curled or has departed from its normal flat state.
  • paper and paper base materials such as surface-coated paper, for example, are subject to such curling due to absorption of moisture through high-humidity conditions, deliberate application of moisture, or for other reasons.
  • a duplicating master After an image has been applied to the lithographic duplicating master, it may be desirable to condition the master by moistening the same independently of the duplicating machine operation.
  • An advantage of such practice is that the moistening or conditioning may take place while the duplicating machine is running copy from a-previously treated master, thus enabling the master to be dampened and made ready without stopping the machine or interrupting its work cycle.
  • the same advantage is apparent in instances where a duplicating master receives an image by means of the electrostatic copying process and is thereafter treated with a liquid prior to attachment to the master cylinder to convert its surface to a condition compatible with lithographic duplicating.
  • Lithographic duplicating masters usually are comprised of a base of fibrous material, such as paper or the like, and include a coating which is applied thereto to provide a surface which is receptive to conventional lithographic inks and wetting solutions.
  • Automatic application of moisture to such masters may be conveniently and advantageously achieved by a roller and reservoir arrangement such as, for example, that shown in U.S. Pat. No. 3,306,255.
  • the structure of the moistening means may take other forms and for the purpose of the invention it is deemed sufficient to point out that the moisture apparently causes the fibrous base material to expand, thus creating upward curling of the longitudinal edges of the master, or the edges which are parallel to the direction of movement of the master as it is moved forward toward the master cylinder.
  • Another object of the invention is to perform the flattening operation automatically while the master is in motion so as to conserve the time required to effect attachment of the master to the cylinder.
  • FIG. l is a top plan showing a means for effecting uncurling of the sheet or duplicating master.
  • FIG. 2 is a section, taken substantially on line 2-2 of FIG. 1.
  • a duplicating master feeding and advancing device indicated generally by the reference numeral 10, including sideplates l2 and 14 which are rigidly held by tie rods 16 and 18.
  • sideplates l2 and 14 which are rigidly held by tie rods 16 and 18.
  • a series of guide members 20 mounted between the sideplates are a series of guide members 20 jointly forming a guideway along which the duplicating masters are fed in the direction of arrow A.
  • the two outer guide members have turned-up flanges 22, 22 which serve to limit sidewise movement of the masters, and folded-over lips 24, 24 which provide funnels for the lead corners of the masters as they move into the feeding station.
  • a bar or support member 26 mounted between sideplates l2 and 14, and affixed thereto in conventional manner, is a bar or support member 26 on which are movably mounted a pair of brackets 28 and 30, to which are secured sheet uncurling or flattening means, or blades 32 and 34 respectively.
  • the free ends of blades 32 and 34 i.e. the ends remote from support member 26, converge toward each other to establish what may be termed a master entrance area, and provide the fingers with angularly disposed diverging outer edges 32a and 34a.
  • Blades 32 and 34 are closely spaced above, and generally parallel to, guideway 20 and project cantilever fashion so as to provide a confining passage for the master and an open throat into which the master may be inserted.
  • the master advancing means may comprise a lower feed roller 36 which is continuously rotated by a conventional drive means, not shown.
  • roller 36 Cooperating with roller 36 are upper or holddown rollers 38 (only one of which is shown in FIG. 2).
  • Rollers 38 are mounted on slides 39, and the slides are adjustably positioned on a bar 41 so that they may be clamped in their laterally adjusted positions by screws 39' in the manner shown.
  • a series of support arms 43 project from the bar 41 across the top operating shaft 40, and corresponding stop fingers 44 extend rearwardly from beneath the shaft 40.
  • Each set including an arm 43 and a finger 44, is clamped to the shaft 40 by screws 45 in driving relation thereto, preferably by means of mating flats formed on the shaft at suitable locations, as seen in FIG. 2.
  • Each of the stop fingers 44 has a depending lip 46 so positioned as to provide a locating stop for the front edge of a manually inserted sheet when the parts are in the FIG. 2 position.
  • the fingers 44 cooperate with a second guideway 42 to form a confined channel or chute which guides the leading edge of an incoming master up to and against the stop lips 46, and thence onto the surface of the master cylinder MC at the appropriate time.
  • the holddown rollers 38 are shown in full lines in FIG. 2 in their upper or inactive position, i.e. the position occupied when a master is being manually moved into place. However, when a master has entered the ready position and is in engagement with the stop lips 46, the rollers 38 are lowered, by means provided for the purpose, to the position shown in broken lines so as to press the master into contact with lower feed roller 36, to thereby advance the master between the rollers toward the master cylinder MC to be clamped thereto. Raising and lowering of rollers 38 and simultaneous lowering and raising of the stop fingers 44 are effected by rocking shaft 40. Such rocking action is controlled by a cam arrangement on the master cylinder in a known manner so as to time the feeding forward of the master with. the availability of the master cylinder clamp, indicated at 50.
  • retainer strips 47 and 48 are clipped onto support member 26, as seen at 47 and 48' in FIG. 1, so as to be slideable thereon and preferably are positioned on the support member so as to overlie the side margins of the master from the time the master is released from the flattening action of blades 32 and 34, thereby maintaining the master in its flattened condition and preventing the lead comers from recurling as the master is forwarded along the second guideway toward ready position.
  • the two outer guide members 20 are positioned to match the width of the sheets or masters to be fed.
  • flattening blades 32 and 34 are so positioned on support member 26 that the terminations of the outer edges 32a and 34a at the fixed ends of the blades are in close proximity to the folded-over lips 24, 24 of the outer guide members 20.
  • Guide strips 47 and 48 are then adjusted along the bar 26 until they overlie the lips 24 and substantially abut the outer extremities of blades 32 and 34.
  • a duplicating master which has previously been moistened is placed on top of guide members 20 with the central portion of the leading edge of the master positioned at the open throat underneath the tips of the free ends of blades 32 and 34.
  • the leading edge of the master will somewhat resemble the letter U, with the bottom of the U" resting between the free ends of blades 32 and 34 and portions of guide members 20.
  • a lithographic duplicator in combination with a master cylinder having a clamp thereon, means to guide into cooperative relationship with the cylinder clamp a moistened paper base duplicating master sheet, whose margins parallel to the direction of motion towards the cylinder are curled upwardly from the surface thereof, comprising:
  • blade means positioned above and generally paralleling the guideway in closely spaced relationship thereto, and spanning the same to provide a confining passage for the master sheet, said blade means being supported from the sides of the guideway at its downstream end and projecting cantilever fashion upstream of the guideway so that the free end of the blade means forms with the guideway an open throat into which the leading edge of the master sheet may be inserted, said blade means having a narrow upstream end portion positioned centrally of the guidewa for enterin between the curled mar ins of the master 5 eet as its eadmg edge is introduce into the throat of the confining passage, said narrow end portion of the blade means merging with diagonal edge portions thereof sloped towards the sides of the guideway and located in a position to encounter the curled edge portions of the master sheet and progressively uncurled them to thereby flatten the master sheet against the guideway as it is pushed progressively into the throat and towards the master cylinder.
  • the blade means comprises two oppositely disposed uncurling blades mounted for adjustment laterally of the guideway to accomthe sheet flattened until the lead edge is in contact with th'e"* a l masiel' Sheas of Varying Widthsstop lips 46. At the appropriate time the rollers 36 and 38 take

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Printing Plates And Materials Therefor (AREA)
US817862A 1969-04-21 1969-04-21 Device for feeding curled sheet material Expired - Lifetime US3589286A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81786269A 1969-04-21 1969-04-21

Publications (1)

Publication Number Publication Date
US3589286A true US3589286A (en) 1971-06-29

Family

ID=25224040

Family Applications (1)

Application Number Title Priority Date Filing Date
US817862A Expired - Lifetime US3589286A (en) 1969-04-21 1969-04-21 Device for feeding curled sheet material

Country Status (3)

Country Link
US (1) US3589286A (enrdf_load_stackoverflow)
DE (1) DE2015292A1 (enrdf_load_stackoverflow)
GB (1) GB1306095A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2800250A1 (de) 1977-01-07 1978-07-20 Gestetner Ltd Plattenaufgabevorrichtung fuer offset- druckmaschinen
US20140247314A1 (en) * 2013-03-04 2014-09-04 Seiko Epson Corporation Recording apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10023169A1 (de) * 2000-05-11 2001-11-15 Roland Man Druckmasch Doppeltwirkende Spreizeinrichtung zur Spreizung einer Bahn

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090849A (en) * 1934-11-16 1937-08-24 Ditto Inc Duplicating machine
US2598795A (en) * 1949-07-29 1952-06-03 Hans A Holterhoff Apparatus for producing moire fabrics
US3196723A (en) * 1961-04-18 1965-07-27 Samcoe Holding Corp Method and means for slitting and opening tubular material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2090849A (en) * 1934-11-16 1937-08-24 Ditto Inc Duplicating machine
US2598795A (en) * 1949-07-29 1952-06-03 Hans A Holterhoff Apparatus for producing moire fabrics
US3196723A (en) * 1961-04-18 1965-07-27 Samcoe Holding Corp Method and means for slitting and opening tubular material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2800250A1 (de) 1977-01-07 1978-07-20 Gestetner Ltd Plattenaufgabevorrichtung fuer offset- druckmaschinen
US4232602A (en) * 1977-01-07 1980-11-11 Gestetner Limited Plate loader for offset printing machines
US20140247314A1 (en) * 2013-03-04 2014-09-04 Seiko Epson Corporation Recording apparatus
US9096082B2 (en) * 2013-03-04 2015-08-04 Seiko Epson Corporation Recording apparatus

Also Published As

Publication number Publication date
DE2015292A1 (de) 1970-10-29
GB1306095A (enrdf_load_stackoverflow) 1973-02-07

Similar Documents

Publication Publication Date Title
DE1804090A1 (de) Vorrichtung zur Beseitigung der Rollkruemmung in aufgerolltem lichtempfindlichem Papier
GB1388205A (en) Diazo copying machine with original recirculating device
US3589286A (en) Device for feeding curled sheet material
US2693357A (en) Front registry mechanism for printing machines
US1210465A (en) Anticurling device for paper sheets.
US3877692A (en) Device for inserting printed products, for example newspaper inserts, into other printed products, for example newspapers
GB1423097A (en) Microfiche duplicator
US3193983A (en) Folder-inserter
US1872945A (en) Tape serving machine
DE2044820A1 (de) Vorrichtung zum Schneiden einer Materialbahn
US4015838A (en) Apparatus and method of forwarding sheet from paper or similar material
US2533184A (en) Sheet material delivery means
US2687886A (en) Registering apparatus for printing machines
US2130101A (en) Apparatus for feeding envelopes and method relating thereto
US3570397A (en) Stencil duplicators
US3947020A (en) Device for automatically separating a photosensitive sheet from an original for copying apparatus
US2289501A (en) Friction stream feeder
US2315175A (en) Duplicating apparatus
US4180317A (en) Apparatus for developing sheets of diazotype copying material by the semi-dry process
DE688064C (de) Lichtpausvorrichtung
DE2657198C3 (de) Vorrichtung zum repetierenden Vorbeiführen einer Kopiervorlage an einer ' optischen Abtasteinrichtung
US2136977A (en) Paper folding machine
US2121308A (en) Printing press
JPH0213409Y2 (enrdf_load_stackoverflow)
US2363766A (en) Pressure compensator for duplicating machines