US2205998A - Planographic printing plate - Google Patents

Planographic printing plate Download PDF

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Publication number
US2205998A
US2205998A US161970A US16197037A US2205998A US 2205998 A US2205998 A US 2205998A US 161970 A US161970 A US 161970A US 16197037 A US16197037 A US 16197037A US 2205998 A US2205998 A US 2205998A
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US
United States
Prior art keywords
parchment
printing
water
grease
backing
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
US161970A
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English (en)
Inventor
William B Wescott
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
Priority to NL49764D priority Critical patent/NL49764C/xx
Priority to BE423865D priority patent/BE423865A/xx
Application filed by Multigraphics Inc filed Critical Multigraphics Inc
Priority to US161970A priority patent/US2205998A/en
Priority to GB26199/37A priority patent/GB496421A/en
Priority to FR827244D priority patent/FR827244A/fr
Priority to CH205916D priority patent/CH205916A/fr
Priority to US312390A priority patent/US2348771A/en
Application granted granted Critical
Publication of US2205998A publication Critical patent/US2205998A/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
    • B41N1/12—Printing plates or foils; Materials therefor non-metallic other than stone, e.g. printing plates or foils comprising inorganic materials in an organic matrix
    • B41N1/14—Lithographic printing foils

Definitions

  • PLANOGRAPHIC PRINTING PLATE Filed Sept. 1, 1937 m'zziam. W/e @W Patented June 25, 1940 UNITED sTATas 2,295,991; ⁇ i PLANoGnAPmc PRINTING PLATE .William B. Wescott, Dover, Mass., assignor to Addressograph-Multigraph Corporation, Wil. mington, Del., a corporation of Delaware Application september 1, 1937, serial No. 161,970
  • This invention relates to an improvement in planographic printing, and more particularly to a cellulosic planographic printing plate and to a method of preparing the same for printing, said 5 planographic printing plate being characterized by a printing face of dense amyloid parchment, a coextensive backing of kraft. or the like tough paper'and a bonding layer of a waterproof thermoplastic cellulosic cement therebetween; said l printing face, backing and bonding layer being coextensive and preferablytranslucent, and said plate preferably bearing thereon indicia applied either to the printing face or to the inside face of the backing and being legibly visible at the l printing face by incident light.
  • the older lithographie process makes use of a dressed surface of absorbent stone and the younger related planographic process has heretofore made use of variously treated metal surfaces.
  • the retention of a dir ectly delineated image depends upon a reaction between the metal ofthe substance of the surface and a fatty acid in the image-forming material.
  • Another object is to provide a planographic I printing plate having a printing face of dense translucent: amyloid parchment, a coextensive backing of tough kraft or the likepaper ⁇ and an intervening waterproof layer of transparent l thermoplastic cellulosic adhesive.
  • a further object of this invention is to ⁇ pro-i vide a composite planographic printing plate of the character described wherein swelling of the printing facey due to the absorption of Water 10 therein is substantially conned to ⁇ a direction normal to said face and wherein lateraldisf': tortion of said printingplate and of aprinting image carried thereon .ist substantiallyavoided; thereby. y v Y y f l5 ⁇ A still further'object of .this invention isv totv provide a 'composite planographic printing platel ⁇ of the character described, which issuicientlyt i translucent to readily admit o f tracing there. through by transmitted light though not ⁇ neces-A' 20 sarily by incident light.
  • Another Object is to provide an imperforate -planographic printing plate of the character described and further characterized. by a trans- 40 verse scoring adjacent and parallelto each end thereof, ⁇ said scoring being convex on the facing side of said plate and concave on the reverseside thereof, whereby end-portions of the plate may be readily folded over to engage tensioning means 4g on or ,attachable to the impression cylinder of a planographic printing press.
  • plates embodying this invention is that by reason of their translucency tracings may be made thereon from underlying 50 originals. Another advantage is that the guiding indicia will not interfere with the use of theplate as by curtailing the working area and the objections to impressed guiding indicia on thin sheet metal or metal foil-faced plates are thus 55 sary. 'suitable for the purposes of this invention and avoided. Another advantage is that plates of this invention are made up of commercially obtainable products by a mere assembly thereof and hence are inexpensive to manufacture. Other objects and advantages will become apparent as the description proceeds.
  • planographic printing is used herein to denote that printing process in. which the surface of the printing element is substantially plane and in which the printing image is substantially in the plane of the printing surface. That is to say, the printing image is neither raised appreciably above nor sunk below the plane of the printing surface as in printing from type or from a deep etched plate on the one hand or from an engraved or intaglio plate on the other.
  • substantially plane is used to denote a surface which is macroscopically though not necessarily microscopically smooth and one in which variations from the mean are microscopically small.
  • amyloid parchment is used to denote the product of the well-known process of treating water-leaf paper in sulfuric acid, wash,.l ing, neutralizing, drying and sometimes but not always or necessarily calendering the same.
  • amyloid parchment is suitable for the purposes of ⁇ this invention but any amyloid parchment which fulfills the criteria hereinafter catalogued is suitable for said purposes.
  • amyloid parchment which fulfills the criteria hereinafter catalogued is suitable for said purposes.
  • general criteria of suitability for the purposes of this invention are:
  • the parchment must be of such character as to be highly resistant to distintegration by water, i. e., it must have and retain a high cohesion when saturated with water;
  • the parchment must be readily wet by and absorptive of 'water (4)
  • the parchment must be substantially plane and of substantially uniform high density and corresponding translucency;
  • grease integrated with the dry parchment should not be readily displaced by water later applied, but grease contracted with parchment previously dampened by water but without other preparatory treatment should be readily displaced by water later applied.
  • the resistance of the amyloid parchment to distintegration by water may be tested by irnmersing a sample of the material in question in water at room temperature for one hour and then hspreading the sample on a smooth hard surface,
  • the inking brayer should be repeatedly rolled across it in several directions, preferably at right angles to each other, until such area is rolled up solid or completely covered with ink.
  • the parchment under test is suitable in respect of its ability to retain grease applied thereto and integrated therewith when dry, it will be found atthe completion of the above testthat the ink on the originally inked Iii area has remained substantially unchanged and ⁇ f hasnot been gpreciably disturbed by the etching solution. If the parchment under test is suitable in respect of its ability of repel ink whenwet, i. e., free from any component or contaminant which is preferentially grease receptive, it will im 60 lbs.
  • the intervening layer is a waterinsoluble, thermoplastic, transparent, cellulose derivative, such as cellulose, acetatel or nitrate plasticized with resin having an adhesion to the parchment facing when the facing is saturated with water of at least vfive ounces per linear inch.
  • the backing is protected by the intermediate layer from the effect of the dampening solution applied to th printing face' in the usual way during the printing operation andhence, although the parchment printings'face does swell due to the absorption of the dampening solution,
  • the plate is provided with indicia, such as guide marks applied to the inner facev Iof the backing and covered by the parchment and thermoplastic layer.
  • indicia such as guide marks applied to the inner facev Iof the backing and covered by the parchment and thermoplastic layer.
  • the parchment is translucent and the said layer is transparent, the indicia are readily visible therethrough by incident light and obviously do not .print because of the coverage afforded by the parchment.
  • the indicia may be printed directly upon the face of the vparchment with a known ink which is either non-printing, i. e., not receptive to lithographie printing ink, or"is water-soluble and readily re' moved by the dampening solution and not trans- 'Ierred with theimage when the plate is used for printing.
  • the indicia may be in the form of marks ,to assist in the proper location of typing or other images upon the printing face or in the form of advertising or trade-marks.
  • the essence of this feature- is that the indicia takeV no part in the use ofthe plate for printing. V
  • the plate may be 'and preferably is substanv tially translucent so that designs maybe traced upon the printing face in suitableink-receiving image material under the guidance of originals which are rendered visible at the printing face by' light transmitted through -the plate, though not necessarily visible by incident light.
  • the translucency of the backing may be enhanced as desired in well known ways as by impregnation with waxy or resinous materials.
  • the plate may be secured to the impression element of the machine by means of an adhesive thereof, whereby the ends of the plate may be readily folded over.
  • Figure 1 is va plan view and Figure 2 is a sectional yview.
  • a composite planographic lprinting plate comprising a facing of amyloid parchment readily wet by and absorptive of water and highly resistant to disintegration thereby which parchment when substantially dry is readily wettable by grease and, when integrated with grease is retentive thereof against the displacing effect of water or acidic dampening solutions and, when wet by water is repellant to grease, such parchment being of substantially uniform high density and corresponding translucency and adapted to receive the printing image thereon, a. backing for said parchment and a waterproof intervening layer by which the parchment is secured to the backing, said layer being substantially Atransparent whereby indicia on the inner face of the backing can be read Yby incident light through the facing and intervening layer.
  • a composite planographic printing plate comprising a facing of amyloid parchment readily wet by and absorptive of water and highly resistant to disintegration thereby which parchlayer by which the parchment is secured to the backing, and having indicia upon the facing in ink which is water soluble and readilyremoved by the damping solution employed in the printing operation.
  • a composite planographic printing plate comprising a facing of amyloid parchment readily Wet by and absorptive of water and highly resistant to disintegration thereby which parchment when substantially dry is readily wettable by. grease and, when integrated with grease, is retentive thereof against the displacing effect of water or acidic dampening solutions and, when Wet by water, is repellant to grease, such parchment being of substantially uniform high density and. corresponding translucency andadapted to receive the printing image thereon, a backing for said parchment, a waterproof intervening layer by which the parchment is secured to the backing, said backing being of cellulose material and said intervening layer and backing being sufflciently translucent so that images may be visually perceived through the plate by light transmitted therethrough and tracings thereof made upon the facing.
  • a composite planographic printing'plate a backing for said facing and a waterproof intervening layer which the facing is secured to the backing, said facing, backing and intervening layer being coextensive and the parchment forming said facing being readily wet by and absorptive of water and highly resistant to disintegration thereby, .
  • which parchment when substantially dry, is readily wettable by grease and, when integrated with grease, is retentive thereof against the displacing effect of water or acidic dampening solutions and, when wet by water, is repellant to grease such parchment possessing a substantially uniform density corresponding to an opacity of between 0.45 and 0.55 as determined for a thickness of 0.004 of an inch in a Bausch and Lomb opacimeter.
  • a composite planographic printing plate comprising a facing of amyloid parchment adapted to receive the printing image thereon, a substantialiy translucent backing for said facing and a substantially translucent waterproof intervening layer by which the facing is secured to the backing, said facing, backing and intervening layer be coextensive and the parchment forming said facing being readily wet by and absorptive of water and highly resistant to disintegration thereby, which parchment, when substantially dry, is readily wettable by grease and, when integrated with grease, is retentive thereof against the displacing effect of water or acidic dampening solutions and, when wet by water, is

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  • Printing Methods (AREA)
  • Printing Plates And Materials Therefor (AREA)
US161970A 1937-09-01 1937-09-01 Planographic printing plate Expired - Lifetime US2205998A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
NL49764D NL49764C (en)) 1937-09-01
BE423865D BE423865A (en)) 1937-09-01
US161970A US2205998A (en) 1937-09-01 1937-09-01 Planographic printing plate
GB26199/37A GB496421A (en) 1937-09-01 1937-09-28 Improvements in plangraphic printing plate
FR827244D FR827244A (fr) 1937-09-01 1937-09-29 Perfectionnements aux planches d'impression planographique
CH205916D CH205916A (fr) 1937-09-01 1937-09-30 Planche d'impression planographique.
US312390A US2348771A (en) 1937-09-01 1940-01-04 Planographic printing plate

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US161970A US2205998A (en) 1937-09-01 1937-09-01 Planographic printing plate
US312390A US2348771A (en) 1937-09-01 1940-01-04 Planographic printing plate

Publications (1)

Publication Number Publication Date
US2205998A true US2205998A (en) 1940-06-25

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Family Applications (2)

Application Number Title Priority Date Filing Date
US161970A Expired - Lifetime US2205998A (en) 1937-09-01 1937-09-01 Planographic printing plate
US312390A Expired - Lifetime US2348771A (en) 1937-09-01 1940-01-04 Planographic printing plate

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Application Number Title Priority Date Filing Date
US312390A Expired - Lifetime US2348771A (en) 1937-09-01 1940-01-04 Planographic printing plate

Country Status (6)

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US (2) US2205998A (en))
BE (1) BE423865A (en))
CH (1) CH205916A (en))
FR (1) FR827244A (en))
GB (1) GB496421A (en))
NL (1) NL49764C (en))

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511783A (en) * 1946-02-28 1950-06-13 Planographic printing sheet
US2516613A (en) * 1945-10-22 1950-07-25 Addressograph Multigraph System of setting paper positioning parts on a printing machine
US2540158A (en) * 1947-01-29 1951-02-06 Addressograph Multigraph Planographic printing and adhesive sheeting for use therein
US2561353A (en) * 1947-02-03 1951-07-24 Finno James Lithographic printing plate
US2582347A (en) * 1945-03-08 1952-01-15 Columbia Ribbon & Carbon Planographic printing
US2783910A (en) * 1953-02-12 1957-03-05 Everett A Johnson Duplicating and affixing method
EP2309257A1 (en) 2008-03-27 2011-04-13 Analogic Corporation Method of and system for three-dimensional workstation for security and medical applications

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB844085A (en) * 1957-01-25 1960-08-10 Addressograph Multigraph Improvements relating to planographic printing plates
US4653473A (en) * 1984-04-20 1987-03-31 Kempe Frieder K Method and article for pain reduction using radiation-shielding textile
US20110210274A1 (en) * 2007-09-13 2011-09-01 Kempe Frieder K Method for alleviation of menopausal symptoms

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2582347A (en) * 1945-03-08 1952-01-15 Columbia Ribbon & Carbon Planographic printing
US2516613A (en) * 1945-10-22 1950-07-25 Addressograph Multigraph System of setting paper positioning parts on a printing machine
US2511783A (en) * 1946-02-28 1950-06-13 Planographic printing sheet
US2540158A (en) * 1947-01-29 1951-02-06 Addressograph Multigraph Planographic printing and adhesive sheeting for use therein
US2561353A (en) * 1947-02-03 1951-07-24 Finno James Lithographic printing plate
US2783910A (en) * 1953-02-12 1957-03-05 Everett A Johnson Duplicating and affixing method
EP2309257A1 (en) 2008-03-27 2011-04-13 Analogic Corporation Method of and system for three-dimensional workstation for security and medical applications

Also Published As

Publication number Publication date
GB496421A (en) 1938-11-30
CH205916A (fr) 1939-07-15
BE423865A (en))
US2348771A (en) 1944-05-16
NL49764C (en))
FR827244A (fr) 1938-04-21

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