US3141407A - Half-tone printing members and method for making same - Google Patents

Half-tone printing members and method for making same Download PDF

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Publication number
US3141407A
US3141407A US5630A US563060A US3141407A US 3141407 A US3141407 A US 3141407A US 5630 A US5630 A US 5630A US 563060 A US563060 A US 563060A US 3141407 A US3141407 A US 3141407A
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United States
Prior art keywords
resin
tone
plastisol
printing
plasticizer
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Expired - Lifetime
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US5630A
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English (en)
Inventor
Harry R Leeds
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.)
SC Johnson and Son Inc
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SC Johnson and Son Inc
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Publication date
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Priority to US5630A priority Critical patent/US3141407A/en
Priority to GB3057/61A priority patent/GB908204A/en
Priority to FR850970A priority patent/FR1278967A/fr
Priority to DEJ19344A priority patent/DE1214246B/de
Priority to BE599709A priority patent/BE599709A/fr
Application granted granted Critical
Publication of US3141407A publication Critical patent/US3141407A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41C—PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTING SURFACES
    • B41C3/00—Reproduction or duplicating of printing formes
    • B41C3/06—Reproduction or duplicating of printing formes to produce printing blocks from plastics
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/04—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms

Definitions

  • This invention relates to printing members and methods for producing these members. More particularly, the invention relates to printing members having the ability to produce half-tone imprints in a single step and to a method of making these printing members.
  • Photo engraving which is the generic term applied chiefly to the making of etched metal printing plates or blocks of zinc, copper, brass, etc., the design being in relief for topographical printing, is of more recent origin.
  • Half-tone engraving represents a major phase of photoengraving art. It is the process by which full tone subjects are reproduced to create the impression of a real life view.
  • a photographic negative is made in the usual way, but to produce an etched surface on the printing member, the exposure is made through a screen.
  • This screen may be composed of grains in the case of a mezzograph, or more generally, a series of lines running across each other at right angles.
  • the cross-lined screen usually consists of two sheets of thin plate glass ruled with diagonal lines of mechanical exactitude. These are engraved into the glass, each piece of glass being ruled at right angles to the other. The lines are filled with a black pigment, leaving transparent spaces between them.
  • the two sheets of glass are placed face to face and sealed, the black lines crossing each other and leaving square transparent openings through which the light passes, forming a half-tone or dot image on the photographic film or plate.
  • the screen is interposed between the photographic plate in the camera and the object to be photographed.
  • the tones in the original object are represented by a number of dots varying in area according to the tones of the original object. Black areas exist where the original object was white, and conversely, where the original object was dark, the negative will be transparent allowing light to pass through without hindrance.
  • a printing plate is prepared from a metal such as copper, zinc, brass, magnesium, or any other readily etchable material. This is accomplished by interposing the half-tone negative between a bright light (usually an electric arc) and the metal plate.
  • the metal plate has been coated with a light sensitive solution which, as those skilled in the art will appreciate, may be of varied compositions. When the metal plate consists of copper, the light sensitive solution frequently is composed of Water, fish glue and ammonium bicarbonate. Zinc plates are usually coated with a solution of ammonium bicarbonate and shellac in an alcohol carrier. This light sensitive solution is poured onto the plate which is usually placed in a whirler to distribute the coating evenly.
  • the time of exposure varies according to the density of the negative, the solution used, and the intensity of the light.
  • the coating is hardened in the areas where the light penetrates the negative and strikes the coating.
  • the coating which is not hardened is readily washed away with an alcohol or other appropriate solvent.
  • the plate is then placed in an etching bath which, in the case of copper, usually consists of iron perchloride, or in the case of zinc, dilute nitric acid.
  • an etching bath which, in the case of copper, usually consists of iron perchloride, or in the case of zinc, dilute nitric acid.
  • the exposed portions of the plate not protected by the hardened light sensitive film are etched until the fine dots in the highlights (lighter portions of the final printing plate) are as small as it is possible to etch them without undercutting or losing the dots.
  • the degree of etching is proportional to the time the plate is allowed to remain in the acid bath.
  • the resultant plate now has a relief design of the original photograph image with the etched surfaces duplicating the areas in the negative which were opaque to light while the unetched areas duplicate the transparent areas of the negative.
  • the surface forms a dot pattern of the original object in positive relief.
  • This forms a master mold which may be used directly in printing, but which is used in the present invention to form a somewhat less durable negative mold or series of negative molds from which are cast the resilient printing members of the present invention.
  • the negative mold is prepared by molding a thermoplastic resin or thermosetting resin upon the surface of the master mold. If a thermoplastic resin is used, it should have a melting point in excess of that which is necessary in the heating step required to form the microporous microreticulated resin hereinafter discussed.
  • This thermoplastic or thermosetting resin becomes fixed about the master positive mold in a close fitting relationship so that all of the characteristics of the positive mold appear on the superimposed resin in negative relief.
  • a phenol-formaldehyde resin on a paper backing in an intermediate stage of polymerization is very suitable. It is responsive to heat and pressure during the molding operation, but is converted thereby to a thermoset stage of polymerization. As such, it is not affected by heating steps required in the practice of the present invention.
  • printing members containing halftone reliefs have been made from negative molds by casting thereupon a continuous sheet of vulcanizable material such as natural or synthetic rubber. As heat and pressure are applied to the rubber, it takes shape about the relief pattern of the negative mold so that the two conform reasonably well with each other.
  • This process has been used extensively in producing hand stamps and line cuts in rubber stamps. Limited utilization has been made of the method for producing half-tone printing members bearing images of human beings, scenery and the like. The process and printing members have not enjoyed much success, however, due to the problems encountered in inking them.
  • An object of the present invention is an improvement in the method of making printing members capable of producing half-tone imprints having greater fidelity than is possible using a conventional rubber stamp in conjunction with photoengraving processes, and which do not require inking.
  • Another object of the invention is an improved resilient printing member capable of producing half-tone imprints of high fidelity without inking from an ink pad.
  • the present invention which consists of a printing member having a half-tone relief on the surface thereof, the half-tone surface having a microporous microreticulated resinous structure, the pores of which are filled with a printing fluid which is expressed only upon the application of pressure.
  • the half-tone printing member is formed by filling or surfacing the face of a negative mold of the type heretofore discussed with a plastisol containing ink, and heating the plastisol until a microporous microreticulated resinous half-tone printing surface is formed, the pores of the microporous surface containing a printing fluid.
  • plastisol when used alone herein is intended to mean a conventional plastisol or organosol.
  • Such plastisols are finely divided or colloidal dispersions of a synthetic resin or mixture of resins in a plasticizer or plasticizers with or without other materials such as stabilizers and the like. When heated, the plasticizer and solvents penetrate the resin or volatilize and the mixture sets by coalescence and subsequent solidification of the resin particles.
  • Plastisols are conventionally used for molding, casting films, coating or printing with the resin itself as a coloring agent or coloring carrying agent.
  • inkcontaining plastisol as used herein means a special kind of plastisol.
  • It is a plastisol which when heated will pro prise a microporous microreticulated resinous structure, the pores of which contain a fiuid carrying coloring matter.
  • Its chemical composition may be considerably varied.
  • it is composed of a finely divided thermoplastic resin or thermosetting resin in the thermosplastic stage of polymerization, a plasticizer for the resin and a color carrying liquid which is a relative non-solvent for the resin.
  • the non-solvent liquid having dissolved or dispersed therein a dye or other suitable coloring agent, constitutes the ink.
  • microporous microreticulated are intended to mean that the resinous structure contains many pores which are invisible to the eye and that these pores open upon the surface of the resin which carries the half-tone pattern.
  • thermoplastic resins plasticizers and nonsolvents for the resins
  • plasticizers there may be used a combination of plasticizers, one or more of which has a greater solvency or plasticizing effect on the resin than the other.
  • solvents, plasticizers and non-solvents are relative terms.
  • a liquid which may be a non-solvent for one resin may be a plasticizer for another. Although a liquid may act as a partial plasticizer for a resin, it may still serve the function of a non-solvent in a resin-plasticizer-nonsolvent combination mentioned above.
  • a resin and a plurality of plasticizers may be used to prepare the ink-containing plastisol of the invention.
  • a resin and a plasticizer in combinations such that a portion of the plasticizer serves as a plasticizer and the remainder a non-solvent as that term is used herein.
  • This resin-plasticizer combination is not nearly as desirable as those discussed earlier, but is intended to be embraced by the present invention.
  • a secondary plasticizer is a plasticizer which has limited compatibility with the resin. It usually dilutes the primary or secondary plasticizer, thus reducing its ability to soften the resin. This is a valuable phenomena since it permits the use of many plasticizers whose compatibility with the resin would otherwise be excessive.
  • the structure is formed by the partial coalescence of the resin particles.
  • the resin particles become bonded at their surfaces forming an innerconnecting network of microscopic pores which extend throughout the resinous structure and communicate with its surface.
  • the non-solvent for the resin and perhaps a portion of the plasticizer remains in the voids between the partially coalesced resin particles, filling the pore network thus formed.
  • this portion of the plasticizer or plasticizers does not penetrate the resin, but remains in the pore network to form, with coloring matter, the ink of the half-tone printing members of the present invention.
  • thermoplastic resin or thermosetting resin in the thermoplastic stage of polymerization may be used in the preparation of the ink-containing plastisol.
  • the synthetic resin will constitute a substantial portion of the composition, but as little as 15% of the composition may consist of resin.
  • the maximum amount of ink which is consistent with a strong structure is desired.
  • the resin content will vary from about 15 to about 65 percent by Weight of the ink-containing plastisol; about 20 to about 50 percent being preferred.
  • Typical synthetic resins are cellulose acetate, cellulose acetate butyrate, ethyl cellulose, polymethyl methacrylate, polymethyl acrylate, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl butyral, polyvinyl acetate, copolymers of vinyl chloride and vinyl acetate, polyamides, such as poly e-caprolactam, polyhexarnethylene adipamide, copolymers of adipic acid, sebacic acid, e-caprolactam and liexamethylene diamine, polyisocyanates, otherwise known as polyurethane resins, such as the polyesters of 2,4-tolylene diisocyanate and polyethylene adipate, polyethylene, polypropylene, polyacrylonitrile, polymethylstyrene, alkyd resins, such as polymers of phthalic acid and ethylene glycol, polyesters of ethylene glycol and terephthalic acid, polyesters of
  • III II I I I I PII S A C IIIIIISIIm IISII II II IIIIIISII III IIIII IPII S on L oydnflln )m G 9 .1 0e .60 "e e ⁇ l) h 0 aw 1 m W1 0 mu mg m w. e s I emurmm S a m m n mhhi w m i w mum m we 4 m mma...
  • a wide variety of coloring matter may be used including both dyes and pigments. Satisfactory pigments inblues and greens, ink type carhoic acid reds. Satisfactory iosol red and nigrosine Half-tone screens exist in various gratings or rul ranging from 40 to 400 lines to the inch. In the printmg of most paper of the newspaper variety, a 60 line For ordinary black and white 20 to 150 mesh are used.
  • polyethylene kyl aryl phosphates hich have been fatty acid esters and aromatic h as those boiling at a tempern amount within 40 to about 170% by weight of the her volatile or nonvolatile.
  • nvolatile liquid to avoid Both fluorescent and phosphorescent dyes an the structure during long periods of nonuse. may be used.
  • This nonsolvent can be eit The more volatile the nonsolvent that will have to be exerted to r mixture until the structure has been the final structure of the present inve an ink, it is desirable to use a no drying out of Those skilled in t to select appropri for the various resins apparent to those skilled in th ever, the following list w 400 lines to the inch may be used in the present invention, since the thermoplastic resin powder when heated will conform to the half-tone depressions of the negative mold leaving pores communicating from the interior of the microporous resin to the protrusions or dots comprising the surface of the half-tone printing member.
  • the resin powder should not be larger than about 75 mesh and not smaller than about 600 mesh.
  • the screen will-contain from about 40 to about 150 lines per inch and a majority of the resin particles by weight will be between 400 and 100 mesh size.
  • EXAMPLE 1 50 parts of Geon 121, a polyvinyl chloride powder all of which will pass through a 200 mesh screen, and 5 parts of tribasic lead sulfate (a stabilizer) were mixed with 50 parts of dioctyl phthalate to form a paste. To this paste was added 5 parts of methyl violet together with 50 parts of glycerol monoricinoleate, serving as a vehicle therefor. This ink-containing plastisol was poured into the negative mold of Example A. The mold was placed in a 300 F. oven and heated for about 25 minutes. Thereafter the mold was removed from the oven, cooled, and the resultant printing member stripped from the mold.
  • the printing member which carried the photograph in fine detail, was glued to a conventional wood hand stamp handle and used to make several thousand imprints. Each imprint represented a highly faithful reproduction of the details of the original photograph including the lighting effect, hairline and various shades of clothing. Individual half-tone dots were readily discernible throughout the image.
  • Example 1 was repeated using a negative mold produced in accordance with Example A, except that it possessed 100 gratings (half-tone lines) per inch. The finshowed some evidence of irregularities in the half-tone areas. This indicates that a mesh size greater than 75 would be desirable for use in the invention.
  • Example 1 was repeated substituting 25 parts of an aromatic petroleum distillate having a boiling range of 380- 400 F. (a secondary plasticizer for polyvinyl chloride) for one-half of the dioctyl phthalate. A stamp of comparable quality was obtained.
  • EXAMPLE 5 50 parts by weight of a 200 mesh thermoplastic resin having the composition of 87% vinyl chloride, 13% vinyl acetate and 5 parts of tribasic lead sulfate were mixed with 30 parts of tricresyl phosphate, 30 parts of an aromatic petroleum distillate having a boiling range of 380 400 F. and 40 parts of 2-ethylhexanediol-1,3 with which there had been added 5 parts of methyl violet.
  • the resulting ink-containing plastisol was poured into the negative mold of Example A. The mold was placed in an oven at 300 F. for 20 minutes.
  • the printing member was stripped from the mold, inspected, mounted on a handle, and used to produce hundreds of imprints, each representing a faithful reproduction of the original photograph. As in Examples 1, 2 and 4, there was no smudging of the impression caused by excessive inking as is so frequently the case with conventional half-tone printing members.
  • the tiny pockets between the dots in the half-tone relief became clogged with ink, making a blur on the imprint.
  • the fidelity of imprints made with the member was not as great as with the halftone printing members of the present invention described in earlier examples.
  • the present printing members are always inked with just the right amount of ink.
  • the ink is emitted from the interior of the porous structure only under compression or upon being brought into contact with an absorbent material. There is no excess ink on the half-tone surface to clog the minute spaces between the dots.
  • a method of making a printing member capable of producing a half-tone imprint which comprises surfacing a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said plastisol comprising (A) from about 15% to about 65% by weight of a thermoplastic resin powder and (B) from about 35% to about by weight of a plasticizer for the resin and a color carrying liquid which is a nonsolvent for the resin, the plasticizer of (B) being present in an amount equal to at least about by weight of said plastisol; and heating said plastisol to a temperature sufficient to form a microporous resin having a half-tone printing surface, said microporous resin having pores extending througlr out the half-tone printing surface and communicating with the interior of said microporous resin, the pores of said microporous resin having disposed therein a printing fluid comprising said color carrying liquid.
  • thermoplastic resin powder is polyvinyl chloride.
  • thermoplastic resin is a copolymer of polyvinyl chloride and another ethylenically unsaturated monomer.
  • a method of making a printing member capable of producing a half-tone imprint which comprises surfacing a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said plastisol comprising (A) from about to about 65% by weight of a thermoplastic resin powder of from about 600 to about 75 mesh size, and (B) from about 35% to about 85% by weight of a plasticizer for the resin and a color carrying liquid which is a nonsolvent for the resin, the plasticizer of (B) being present in an amount equal to at least about 5% by weight of said plastisol; and heating said plastisol to a temperature sufficient to form a microporous resin having a half-tone printing surface, said microporous resin having pores extending throughout the half-tone printing surface and communicating with the interior of said microporous resin, the pores of said microporous resin having disposed therein a printing fluid.
  • a method of making a printing member capable of producing a half-tone imprint which comprises surfacing a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said plastisol comprising (A) from about 15% to about 65% by weight of a thermoplastic resin powder, and (B) from about 35% to about 85% by weight of a plasticizer for the resin and a color carrying liquid which is a nonsolvent for the resin, the plasticizer of (B) being present in an amount equal to at least about 5% by weight of said plastisol, said halftone printing surface being defined by a grid having from about 40 to about 400 lines per inch; and heating said plastisol to a temperature suflicient to form a microporous resin having a half-tone printing surface, said microporous resin having pores extending throughout the half-tone printing surface and communicating with the interior of said microporous resin, the pores of said microporous resin having disposed therein an ink.
  • a method of making a printing member capable of producing a half-tone imprint which comprises covering the surface of a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said half-tone printing surface being defined by a grid having from about 40 to about 400 lines per inch and said plastisol comprising (A) from about 15 to about 65 by weight of a thermoplastic resin powder of from about 600 to about 75 mesh size, and (B) from about 35% to about 85% by weight of a plasticizer for said resin and a color carrying liquid which is nonsolvent for said resin, the plasticizer of (B) being present in an amount equal to at least about 5% by weight of said plastisol; and heating said plastisol to a temperature sufficient to form a microporous resin containing a half-tone printing surface, said microporous resin having pores extending throughout the half-tone printing surface and communicating with the interior of said microporous resin, the pores of said microporous resin having disposed
  • a method of making a printing member capable of producing a half-tone imprint which comprises surfacing a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said half-tone printing surface being defined by a grid having from about 40 to about 150 lines per inch, said plastisol comprising (A) from about 15% to about by weight of a thermoplastic resin powder of from about 100 to about 400 mesh size, and (B) from about 35% to about by weight of a plasticizer for the resin and a color carrying liquid which is a nonsolvent for the resin, the plasticizer of (B) being present in an amount equal to at least about 5% by Weight of the plastisol; and heating said plastisol to a temperature sufficient to bond said resin particles together forming a cohesive microporous structure having a halftone printing surface, the pores of said microporous structure communicating from the interior of said structure to its half-tone printing surface.
  • a method of making a printing member capable of producing a half-tone imprint which comprises surfacing a negative mold having a printing surface in half-tone relief with a plastisol without the use of pressure, vacuum, or wetting agents, said half-tone printing surface being defined by a grid of from about 40 to about 150 lines per inch, said plastisol comprising (A) from about 20% to about 50% by weight of a thermoplastic resin powder of from about to about 400 mesh size, and (B) from about 50% to about 80% by weight of a plasticizer for the resin and a color carrying liquid which is a nonsolvent for the resin, the plasticizer of (B) being present in an amount equal to at least about 8% by weight of the plastisol; and heating said plastisol to a temperature sufficient to bond said resin particles together forming a cohesive microporous structure having a half-tone printing surface, the pores of said microporous structure communicating from the interior of said structure to its printing surface.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
US5630A 1960-02-01 1960-02-01 Half-tone printing members and method for making same Expired - Lifetime US3141407A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US5630A US3141407A (en) 1960-02-01 1960-02-01 Half-tone printing members and method for making same
GB3057/61A GB908204A (en) 1960-02-01 1961-01-26 Half-tone printing members and method for making same
FR850970A FR1278967A (fr) 1960-02-01 1961-01-27 éléments d'impression en simili et leur procédé de préparation
DEJ19344A DE1214246B (de) 1960-02-01 1961-01-30 Verfahren zur Herstellung einer selbstfaerbenden gerasterten Hochdruckform
BE599709A BE599709A (fr) 1960-02-01 1961-01-31 Eléments d'impression en simili et leur procédé de préparation

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BE (1) BE599709A (fr)
DE (1) DE1214246B (fr)
GB (1) GB908204A (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303146A (en) * 1963-12-30 1967-02-07 Ibm Liquid-filled porous plastic structures and methods for making them
US3536794A (en) * 1967-05-08 1970-10-27 Du Pont Method of making thermomagnetic recording members
US3720534A (en) * 1964-01-29 1973-03-13 Moore Business Forms Inc Polymer gels and method of making same
US3932251A (en) * 1974-05-16 1976-01-13 Tomoji Tanaka Method for manufacturing an ink-containable stamp
US4017581A (en) * 1975-03-25 1977-04-12 Xerox Corporation Process for preparing relief printing masters and molds
US4293615A (en) * 1980-05-30 1981-10-06 E. I. Du Pont De Nemours And Company Polyvinyl butyral laminates
US4335036A (en) * 1980-05-30 1982-06-15 E. I. Du Pont De Nemours And Company Plasticized polyvinyl butyral employing propylene oxide oligomers
US4481528A (en) * 1980-10-08 1984-11-06 Peck Richard M Multicolor image printing device and method
US5292565A (en) * 1991-06-07 1994-03-08 Porelon, Inc. Ink roll for high speed printing

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1377510A (en) * 1917-05-05 1921-05-10 Stogdell Stokes J Matrix
US2078535A (en) * 1932-08-20 1937-04-27 Ig Farbenindustrie Ag Manufacture of relief printing forms
US2349613A (en) * 1942-02-12 1944-05-23 Ncr Co Porous resilient printing plate
US2353877A (en) * 1942-01-19 1944-07-18 Ncr Co Process for making resilient porous products
US2571397A (en) * 1946-02-12 1951-10-16 Wells Marjorie Stewart Method of producing printing plates
US2600122A (en) * 1949-06-04 1952-06-10 Us Rubber Co Process of forming plastisols
US2777824A (en) * 1950-06-27 1957-01-15 Perma Stamp Products Corp Process for making micro-reticulated material
US2875051A (en) * 1954-05-03 1959-02-24 Chemical Products Corp Relief printing plates and method for fabricating the same
US2966470A (en) * 1955-05-26 1960-12-27 Chemedical Res Associates Process of foaming an admixture of a plastisol and an aqueous surfactant solution

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2052293A (en) * 1934-06-23 1936-08-25 Edward M Hensley Process of typographic reliefing

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1377510A (en) * 1917-05-05 1921-05-10 Stogdell Stokes J Matrix
US2078535A (en) * 1932-08-20 1937-04-27 Ig Farbenindustrie Ag Manufacture of relief printing forms
US2353877A (en) * 1942-01-19 1944-07-18 Ncr Co Process for making resilient porous products
US2349613A (en) * 1942-02-12 1944-05-23 Ncr Co Porous resilient printing plate
US2392521A (en) * 1942-02-12 1946-01-08 Ncr Co Porous resilient printing plate
US2571397A (en) * 1946-02-12 1951-10-16 Wells Marjorie Stewart Method of producing printing plates
US2600122A (en) * 1949-06-04 1952-06-10 Us Rubber Co Process of forming plastisols
US2777824A (en) * 1950-06-27 1957-01-15 Perma Stamp Products Corp Process for making micro-reticulated material
US2875051A (en) * 1954-05-03 1959-02-24 Chemical Products Corp Relief printing plates and method for fabricating the same
US2966470A (en) * 1955-05-26 1960-12-27 Chemedical Res Associates Process of foaming an admixture of a plastisol and an aqueous surfactant solution

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303146A (en) * 1963-12-30 1967-02-07 Ibm Liquid-filled porous plastic structures and methods for making them
US3720534A (en) * 1964-01-29 1973-03-13 Moore Business Forms Inc Polymer gels and method of making same
US3536794A (en) * 1967-05-08 1970-10-27 Du Pont Method of making thermomagnetic recording members
US3932251A (en) * 1974-05-16 1976-01-13 Tomoji Tanaka Method for manufacturing an ink-containable stamp
US4017581A (en) * 1975-03-25 1977-04-12 Xerox Corporation Process for preparing relief printing masters and molds
US4293615A (en) * 1980-05-30 1981-10-06 E. I. Du Pont De Nemours And Company Polyvinyl butyral laminates
US4335036A (en) * 1980-05-30 1982-06-15 E. I. Du Pont De Nemours And Company Plasticized polyvinyl butyral employing propylene oxide oligomers
US4481528A (en) * 1980-10-08 1984-11-06 Peck Richard M Multicolor image printing device and method
US5292565A (en) * 1991-06-07 1994-03-08 Porelon, Inc. Ink roll for high speed printing

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DE1214246B (de) 1966-04-14
BE599709A (fr) 1961-07-31
GB908204A (en) 1962-10-17

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