US3010394A - Reinforced printing plate - Google Patents

Reinforced printing plate Download PDF

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Publication number
US3010394A
US3010394A US791727A US79172759A US3010394A US 3010394 A US3010394 A US 3010394A US 791727 A US791727 A US 791727A US 79172759 A US79172759 A US 79172759A US 3010394 A US3010394 A US 3010394A
Authority
US
United States
Prior art keywords
reinforcing sheet
printing
plate
printing plate
area
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
US791727A
Other languages
English (en)
Inventor
Borchers Henning Henry
Thomas N Gillich
Meister Frederick W Von
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.)
Azoplate Corp
Original Assignee
Azoplate 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
Priority to NL130630D priority Critical patent/NL130630C/xx
Priority to NL248083D priority patent/NL248083A/xx
Application filed by Azoplate Corp filed Critical Azoplate Corp
Priority to US791727A priority patent/US3010394A/en
Priority to DEA33897A priority patent/DE1219049B/de
Priority to FR817785A priority patent/FR1247670A/fr
Priority to GB4424/60A priority patent/GB945254A/en
Application granted granted Critical
Publication of US3010394A publication Critical patent/US3010394A/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
    • B41N1/04—Printing plates or foils; Materials therefor metallic
    • B41N1/08—Printing plates or foils; Materials therefor metallic for lithographic printing

Definitions

  • This invention relates to printing plates and, more particularly, to flexible printing plates made of aluminum foil or the like.
  • the plates used are generally made from paper or aluminum foil or a combination of both. They may be presensitized or sensitized by the user in the case of photo printing, while in the direct image method an image is produced on the plate either by typing, drawing or printing.
  • the greatest portion of cost in the manufacture of such printing plates resides in the expense for the raw material. This is of particular importance with aluminum plates and, in practice, plate thicknesses run from 0.004 inch to 0.0075 inch and higher. ttempts to use aluminum foils thinner than about 0.004 inch to reduce the costs have not been successful since thin foils are frequently damaged during processing even before their installation on the press. Additionally, the frictional forces of the dampener and of the ink roller exerted on the plate'surface during the printing process would tear normal plates of such a thickness from the attaching devices of the press cylinder.
  • the principal object of the present, invention is, therefore, to reduce the cost of printing plates by arrangements which permit the use of aluminum or paper printing plates having substantially smaller thickness than that of pn'nt-' ing plates used heretofore.
  • the initial cost, the shipping weight and the space required for storage would then be greatly reduced.
  • a comparatively thick reinforcing plate or sheet in combination with printing plates which may be thinner than any of the currently employed plates.
  • Such a reinforcing plate can be removably attached to that plate which actually is intended to be used.
  • one reinforcing sheet can be utilized repeatedly in conjunction with a great number of printing plates or foils one after the other.
  • the reinforcing sheet is provided with similar perforations so that the printing plate and the reinforcing sheet are secured to each other and to the press cylinder by means of the mentioned hooks.
  • the plates have, suitably, two marginal strips bent backwardly alongside of each of two opposite edges to form a pair of folds or channels facing each other.
  • the reinforcing sheet having the size of the fiat area of the printing plate between the marginal strips, is inserted into the folds.
  • the reinforced printing plate is subsequently attached to the press cylinder in the same fashion that thicker plates were handled heretofore.
  • the backwardly bent marginal strips take the stresses which, otherwise, would be carried by the edges of the perforations in the plate.
  • FIGURE 1 is an isometric view of a reinforced printing plate
  • FIGURE 2 is a sectional view taken on line 2-2 of FIGURE 1 and looking in the direction of the arrows;
  • FIGURE 3 is a front view of a reinforcing sheet.
  • the substantially flat area 10 constitutes the useful surface of a printing plate and is coated with a layer 12 of a light sensitive material, which is exposed to light under a master and subsequently developed.
  • the area 10 may be processed by any other known method to form a reproducible image. Such a method, distinct from that using presensitized plates, may include a special preparation of the plate followed by subsequently applying the image thereon by typing or drawing.
  • the useful area 10 continues into at least one, preferably two marginal strips 14 and 16 which are folded backwardly at each of two opposite edges 18 and 20 of the flexible plate.
  • the fiat area 10 and the two backfolds 14 and 16 envelope the reinforcing sheet 22 between themselves and the adjacent portions of the nonprocessed surface of the area 10.
  • the sheet 20 has a shape and size identical to that of the area 10 or slightly smaller.
  • a row of perforations 24 is provided alongside of each of the edges 18 and 20.
  • Corresponding perforations through the backfolds 14 and 16 are designated by numeral 26 in FIGURE 2.
  • the reinforcing sheet 2-2 (FIGURE 3) has perforations 28 arranged identically with those in the printing plate and the backfolds.
  • the perforations 24 along the edges of the area 10 are aligned for conveniently attaching the assembly to the cylinder of a printing press or a duplicator.
  • the reinforcing sheet may be provided with the backfolds and the printing plate may be a simple flat sheet.
  • numeral 10 would then desighate the thicker reinforcement having backwardly folded marginal strips 14 and 16.
  • the printingplate 22 would be a plain sheet of which the bottom side in FIGURE 2 has been processed to form a reproducible image, as described above.
  • the reinforcing sheet having substantially the size of the flat area to be fitted between the fiat area and the fold, the fold and the reinforcing sheet being provided with marginal rows of perforations for securing the plate-reinforcing sheet assembly to a printing press, whereby the reinforcing sheet takes the tensioning stress during operation of the press.
  • a printing plate made from a material selected from aluminum foil and paper having a thickness not exceeding about 0.004 inch and on removable integral reinforcing sheet having a thickness in the range of 0.002 inch to 0.006 inch, the plate having a substantially fiat area which continues into at least one marginal strip folded backwardly over one edge of the flat area to form a fold, the reinforcing sheet having substantially the size of the flat area for enveloping it between the flat area and the fold, the fold and the reinforcing sheet being provided with marginal rows of perforations for securing the plate-reinforcing sheet assembly to a printing press, whereby the reinforcing sheet takes the tensioning stress during operation of the press.
  • a printing plate and a removable integral reinforcing sheet In combination, a printing plate and a removable integral reinforcing sheet, the printing plate having a substantially fiat area which continues into at least one marginal strip folded backwardly over one ed e of the that area to form a fold, the reinforcing sheet having substantially the size of the flat area to be fitted between the flat area and the fold, the fold and the reinforcing sheet being provided with marginal rows of perforations for securing the plate-reinforcing sheet assembly to a printing press, whereby the reinforcing sheet takes the tensioning stress during operation of the press. 4.
  • a printing plate and a reinforcing sheet forming one integral unit physically separate from the printing plate, the plate having a substantially flat area which continues into at least one marginal strip folded backwardly over one edge of the fiat area to form a fold, the reinforcing sheet having substantially the size of the'flat area to be fitted between the fiat area andthe fold, the fold and the reinforcing sheet being provided with marginal rows of perforations for removably securing the same reinforcing sheet selectively toa series of printing plates each in succession, in an aligned arrangement, and both to a printing press, whereby the reinforcing sheet takes the tensioning stress during operation of the press.

Landscapes

  • Printing Plates And Materials Therefor (AREA)
US791727A 1959-02-06 1959-02-06 Reinforced printing plate Expired - Lifetime US3010394A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL130630D NL130630C (xx) 1959-02-06
NL248083D NL248083A (xx) 1959-02-06
US791727A US3010394A (en) 1959-02-06 1959-02-06 Reinforced printing plate
DEA33897A DE1219049B (de) 1959-02-06 1960-02-05 Flachdruckplatte
FR817785A FR1247670A (fr) 1959-02-06 1960-02-06 Planche d'impression renforcée
GB4424/60A GB945254A (en) 1959-02-06 1960-02-08 Improvements in or relating to flexible printing plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US791727A US3010394A (en) 1959-02-06 1959-02-06 Reinforced printing plate

Publications (1)

Publication Number Publication Date
US3010394A true US3010394A (en) 1961-11-28

Family

ID=25154613

Family Applications (1)

Application Number Title Priority Date Filing Date
US791727A Expired - Lifetime US3010394A (en) 1959-02-06 1959-02-06 Reinforced printing plate

Country Status (5)

Country Link
US (1) US3010394A (xx)
DE (1) DE1219049B (xx)
FR (1) FR1247670A (xx)
GB (1) GB945254A (xx)
NL (2) NL248083A (xx)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183832A (en) * 1960-02-01 1965-05-18 Azoplate Corp Lithographic printing foil
US3217644A (en) * 1962-03-30 1965-11-16 Mosstype Corp Clamping means for mounting carrier sheets on flat or round surfaces
US3463082A (en) * 1965-04-15 1969-08-26 Agfa Gevaert Ag Offset printing machine with wiping sheet for removing ink from blanket cylinder
US3947199A (en) * 1971-01-20 1976-03-30 Hecht Robert F Apparatus having moveable pocket forming members for injection molding a composite plate
US4092925A (en) * 1976-08-05 1978-06-06 Fromson H A Lithographic printing plate system
US4408530A (en) * 1982-08-13 1983-10-11 Mitsubishi Jukogyo Kabushiki Kaisha Automatic printing plate exchange system
US5003870A (en) * 1989-08-21 1991-04-02 Hughes Aircraft Company Antistretch screen printing arrangement
US6578485B2 (en) 2001-08-16 2003-06-17 Kodak Polychrome Graphics Llc Article and method for use in preparing a lithographic printing plate by imaging in a printer engine

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937593A (en) * 1954-12-23 1960-05-24 Ritzerfeld Wilhelm Printing foil attaching arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE477440C (de) * 1928-02-23 1929-06-11 Leopold Rado Druckplatte fuer Flachdruck, insbesondere Offsetdruck, bestehend aus einer biegsamenMetallbahn
CH200389A (de) * 1936-07-20 1938-10-15 Hermann Wolff Aluminiumblatt für Büroflachdruck, sowie Verfahren und Einrichtung zur Herstellung eines solchen Blattes.

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937593A (en) * 1954-12-23 1960-05-24 Ritzerfeld Wilhelm Printing foil attaching arrangement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3183832A (en) * 1960-02-01 1965-05-18 Azoplate Corp Lithographic printing foil
US3217644A (en) * 1962-03-30 1965-11-16 Mosstype Corp Clamping means for mounting carrier sheets on flat or round surfaces
US3463082A (en) * 1965-04-15 1969-08-26 Agfa Gevaert Ag Offset printing machine with wiping sheet for removing ink from blanket cylinder
US3947199A (en) * 1971-01-20 1976-03-30 Hecht Robert F Apparatus having moveable pocket forming members for injection molding a composite plate
US4092925A (en) * 1976-08-05 1978-06-06 Fromson H A Lithographic printing plate system
US4408530A (en) * 1982-08-13 1983-10-11 Mitsubishi Jukogyo Kabushiki Kaisha Automatic printing plate exchange system
US5003870A (en) * 1989-08-21 1991-04-02 Hughes Aircraft Company Antistretch screen printing arrangement
US6578485B2 (en) 2001-08-16 2003-06-17 Kodak Polychrome Graphics Llc Article and method for use in preparing a lithographic printing plate by imaging in a printer engine

Also Published As

Publication number Publication date
DE1219049B (de) 1966-06-16
NL130630C (xx)
GB945254A (en) 1963-12-23
NL248083A (xx)
FR1247670A (fr) 1960-12-02

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