US3413706A - Printing plate preparation - Google Patents

Printing plate preparation Download PDF

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Publication number
US3413706A
US3413706A US366372A US36637364A US3413706A US 3413706 A US3413706 A US 3413706A US 366372 A US366372 A US 366372A US 36637364 A US36637364 A US 36637364A US 3413706 A US3413706 A US 3413706A
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US
United States
Prior art keywords
plate
film
plate cylinder
printing
along
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
US366372A
Other languages
English (en)
Inventor
Robert Allen Shade
Ernst Daniel Nystrand
Gerald Lee Marchant
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.)
Paper Converting Machine Co
Original Assignee
Paper Converting Machine Co
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 Paper Converting Machine Co filed Critical Paper Converting Machine Co
Application granted granted Critical
Publication of US3413706A publication Critical patent/US3413706A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41N—PRINTING PLATES OR FOILS; MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING, INKING, DAMPING, OR THE LIKE; PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM
    • B41N1/00—Printing plates or foils; Materials therefor
    • B41N1/16—Curved printing plates, especially cylinders
    • B41N1/22—Curved printing plates, especially cylinders made of other substances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/005—Attaching and registering printing formes to supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1287—Devices for attaching printing elements or formes to supports for attaching flexible printing formes devices for bending the printing plates or the printing plate ends
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49764—Method of mechanical manufacture with testing or indicating
    • Y10T29/49778—Method of mechanical manufacture with testing or indicating with aligning, guiding, or instruction
    • Y10T29/4978—Assisting assembly or disassembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49895—Associating parts by use of aligning means [e.g., use of a drift pin or a "fixture"]

Definitions

  • This invention relates to a printing plate preparation, including the method of the same. More particularly, the invention relates to the preparation of flexible plastic plates which are wrapped around a plate cylinder.
  • plastic printing plates are in the production of multiple copy forms wherein a plurality of identical plates are employed to simultaneously print a plurality of webs, which are then arranged in register for the development of the multiple copy formsas for a variety of office procedures.
  • Nystrand application has to do with structure for mount ing a film-type plate in the printing press. In doing this, however, it was found that the plates were not uniformly stressed, so that perfect register in the various Webs was not achieved. Therefore, an important objective of the instant invention is to provide a method and apparatus for preparing thin plastic film printing plates in such a fashion that the same are advantageously mounted on plate cylinders so as to avoid the undesirable feature of imperfect register in going from one printing plate to another.
  • FIG. 1 is a fragmentary top plan view of a printing plate mounting apparatus embodying teachings of the invention
  • FIG. 5 is a perspective view of the structure of FIGS. 1 and 2 and illustrating the manner of locating the printing plate thereon;
  • FIG. 6 is a top plan view of the structure, showing how the located plate of FIG. 5 is clamped at one end by a clamping bar and at the other end by stretching weights and which will be more fully described hereinafter;
  • FIG. 7 is a perspective view showing how the structure is disposed in a vertical position so that the weights exert an even tensioning stress on the plate and the second clamping bar is tightened;
  • FIG. 8 is a perspective view of the structure, showing how the plate is scribed, for future bending, using the clamping bars as guides in this operation;
  • FIG. 10 is a perspective view of the structure which may be employed for trimming and scoring the plate after the scribing operation described above has been performed;
  • FIG. 12 is a perspective view showing one way in which the end margins of the plates may be bent over and creased after the heating operation of FIG. 11;
  • FIG. 14 shows the finished plate when mounted on the plaie cylinder of a press
  • FIG. 15 is an elevational view of a stand upon which the structure of FIGS. 1 and 2 is mounted for turning the same at different angular positions for handling the plate.
  • apparatus for preparing the plate includes a frame or base 26 which provides a planar or flat platform 27.
  • the frame 26 pro vides a support for a first clamping member 28 (see FIG. 4) adjacent and over one end of the platform 27.
  • the clamping bar 28 is seen to confine one edge of the plate 22, and for this purpose the clamping bar 28 is secured to the plafol'rn 27 by means of a capscrew or bolt 30, about which is ensleeved a spring 29.
  • a second clamping bar or member 31 is provided at the other end of the platform 27, and this clamping bar is also provided with a plurality of capscrews 33, each equipped with its helical spring 32.
  • a plurality of weights 34 Freely supported on the frame 26 at one end of the platform 27 are a plurality of weights 34 made up of upper and lower portions 35 and 36, respectively (see FIG. 2).
  • the upper and lower parts 35 and 36 are connected together by means of capscrews 27, each being equipped with springs 38.
  • the first step in preparing the plate 22 is to position the same on the platform 27, and in FIG. 5 we see a scale or rule 39 in the hand of an operator 40 being used to position a reference mark 41 a predetermined distance from the linear edge of the first clamping bar 28.
  • This provides a point of reference'which will be identical for each of the multiplicity of plates 22 which will be provided according to the instant invention.
  • a second clamping operation is also performed, and this also is depicted somewhat schematically in FIG. 6, wherein a wrench 43 is employed to tighten the capscrews 37 associated with the various weights 34.
  • the plate 22 is clamped along one end by the first clamping bar 28 and is thus immovable at that end relative to the platform 27.
  • the other end of the plate 22, i.e., the end engaged by the plurality of weights 34, is free to move relative to the platform, and the weights 34 exert a uniform tension stress across the width of the plate 22.
  • the uniform stress is advantageously utilized by orienting the platform vertically in the condition illustrated in FIG. 7, whereby the weights 34 extending across the width of the plate 22 elongate the same within its elastic limit and provide reproducible results in working on successive plates 22.
  • a wrench 44 is employed to tighten the capscrews 33 associated with the second clamping bar 31. This is performed in the illustration given-while the platform 27 is vertically oriented so that now the plate 22 is confined between two straight edge-equipped, parallel clamping bars 28 and 31.
  • the plate 22 is suitably scribed as is illustrated schematically in FIG. 8 wherein the operator 40 makes use of a stylus 45 for drawing a line along the plate 22 using the first clamping bar as a guide. A similar scribe line is developed by drawing the stylus along the second clamping bar 31.
  • the various clamps and weights are released to provide the plate in the form seen in FIG. 9, wherein the first scribe mark is designated by the numeral 46 and the second by the numeral 47-it being seen that the plate 22 extends a greater distance beyond the scribe line 47 than beyond the line 46-as at 48. In the illustration given, this is advantageous, since it provides an additional edge portion for connection of the weights 34.
  • a knife-equipped cutting board is designated 49 and the knife 50 is seen in the process of trimming the excess edge portion 48 from the plate 22.
  • the plate 22 is heated-advantageously to a temperature in the range of IOU-200 F. and in areas along the scribe lines 46 and 47 by means of a suitable heater as at 51 which facilitates the creasing operation shown in FIG. 12.
  • the plate 22 is seen being creased along the line 46 as by a suitable creasing roller 52, after which the same operation is performed along the line 47 to develop the construction seen in FIG. 13.
  • the creases are again designated as at 46 and 47 and provide radially inwardly-extending folded edges as at 46a and 47a which are advantageously clamped within the dovetailed recess 23 of the plate cylinder 20.
  • the platform 27 may be advantageously mounted on a swivel joint as at 53 (see FIG. so as to facilitate the reorientation to the vertical position designated 27' in FIG. 15, thereby applying the uniform longitudinal stress to the plate 22 illustrated schematically in FIG. 7.
  • the printing plate mounting system has advantageous application to thin wrap-around printing plates employed for mounting on plate cylinders.
  • the printing plate material may be magnesium, zinc, metal-backed rubber, metal-backed photopolymer, metal-backed tanned gelatin, aluminum, or plastic-backed plates of any of these materials.
  • scribe line is placed across both clamped edges, using the straight edges of the clamps as a guide, thereby providing scribe lines suitably referred to the image, it being appreciated that the clamping members are arranged in parallel relation to each other.
  • the plate is removed from the clamping fixture and the scribed ends are bent at right angles with. in some instances, heat applied to the plate to facilitate the bending operation.
  • heating is advantageous when very small plate cylinders, of the order of 2-4" in diameter, are utilized.
  • the plate is mounted on the plate cylinder and advantageously a lubricant may be applied to the sur face of the cylinder to insure conformity of the plate thereto.
  • a method of printing plate preparation comprising elastically longitudinally stretching a plastic film substantially uniformly across its width adapted to be wrapped about a plate cylinder, scribing said film along a pair of spaced-apart transverse lines while said film is in stretched condition, folding said film on itself along said lines to develop insert flaps for said plate cylinder and thereafter mounting said film in enveloping relation on a plate cylinder with the fold lines engaging opposite sides of a longitudinal recess in the plate cylinder whereby substantially identical register in successive plates may be achieved.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
US366372A 1964-05-11 1964-05-11 Printing plate preparation Expired - Lifetime US3413706A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US36637264A 1964-05-11 1964-05-11

Publications (1)

Publication Number Publication Date
US3413706A true US3413706A (en) 1968-12-03

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US366372A Expired - Lifetime US3413706A (en) 1964-05-11 1964-05-11 Printing plate preparation

Country Status (4)

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US (1) US3413706A (de)
AT (1) AT278867B (de)
DE (1) DE1436466A1 (de)
GB (1) GB1046373A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003184A (en) * 1975-04-28 1977-01-18 Shiu Thomas B Method and apparatus for packaging sliced bacon and the like
US20040168598A1 (en) * 2003-02-13 2004-09-02 Konica Minolta Holdings, Inc. Printing plate material, process of folding the same, and printing process
US20060116263A1 (en) * 2004-12-01 2006-06-01 Pitney Bowes Incorporated Method and device for creasing paper

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3221206A1 (de) * 1982-06-04 1983-12-08 Basf Ag, 6700 Ludwigshafen Tiefdruckplatte zum aufspannen auf einen tiefdruck-spannzylinder und verfahren zu ihrer herstellung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2027314A (en) * 1932-10-13 1936-01-07 Heinlein Eugen Method of manufacturing thinwalled shaped bodies
US2039096A (en) * 1933-08-05 1936-04-28 Alan R Lukens Method of molding battery containers and similar open top receptacles
US2589022A (en) * 1948-06-21 1952-03-11 Robert Gair Co Inc Apparatus and method for making plastic folding containers
US2704025A (en) * 1952-01-24 1955-03-15 Dick Co Ab Means for minimizing distorting of duplicating masters in use
US2896312A (en) * 1955-02-25 1959-07-28 Gen Motors Corp Refrigerating apparatus
US3126825A (en) * 1964-03-31 Plate cylinder for wrap-around printing plate and method
US3179974A (en) * 1961-03-15 1965-04-27 Tonolo Alessandro Stretching frame
US3184787A (en) * 1961-07-28 1965-05-25 Gevaert Photo Prod Nv Device for stretching thermoplastic films

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126825A (en) * 1964-03-31 Plate cylinder for wrap-around printing plate and method
US2027314A (en) * 1932-10-13 1936-01-07 Heinlein Eugen Method of manufacturing thinwalled shaped bodies
US2039096A (en) * 1933-08-05 1936-04-28 Alan R Lukens Method of molding battery containers and similar open top receptacles
US2589022A (en) * 1948-06-21 1952-03-11 Robert Gair Co Inc Apparatus and method for making plastic folding containers
US2704025A (en) * 1952-01-24 1955-03-15 Dick Co Ab Means for minimizing distorting of duplicating masters in use
US2896312A (en) * 1955-02-25 1959-07-28 Gen Motors Corp Refrigerating apparatus
US3179974A (en) * 1961-03-15 1965-04-27 Tonolo Alessandro Stretching frame
US3184787A (en) * 1961-07-28 1965-05-25 Gevaert Photo Prod Nv Device for stretching thermoplastic films

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4003184A (en) * 1975-04-28 1977-01-18 Shiu Thomas B Method and apparatus for packaging sliced bacon and the like
US20040168598A1 (en) * 2003-02-13 2004-09-02 Konica Minolta Holdings, Inc. Printing plate material, process of folding the same, and printing process
US7086333B2 (en) * 2003-02-13 2006-08-08 Konica Minolta Holdings Printing plate material, process of folding the same, and printing process
US20060116263A1 (en) * 2004-12-01 2006-06-01 Pitney Bowes Incorporated Method and device for creasing paper
US7549955B2 (en) * 2004-12-01 2009-06-23 Pitney Bowes Inc. Method and device for creasing paper

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Publication number Publication date
DE1436466A1 (de) 1968-10-31
GB1046373A (en) 1966-10-26
AT278867B (de) 1970-02-10

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