US1698705A - Stencil sheet - Google Patents

Stencil sheet Download PDF

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Publication number
US1698705A
US1698705A US109973A US10997326A US1698705A US 1698705 A US1698705 A US 1698705A US 109973 A US109973 A US 109973A US 10997326 A US10997326 A US 10997326A US 1698705 A US1698705 A US 1698705A
Authority
US
United States
Prior art keywords
stencil sheet
sheet
stencil
coated
phenolic resin
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
US109973A
Inventor
Horii Shinjiro
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to US109973A priority Critical patent/US1698705A/en
Priority claimed from GB1324126A external-priority patent/GB274241A/en
Application granted granted Critical
Publication of US1698705A publication Critical patent/US1698705A/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
    • B41N1/24—Stencils; Stencil materials; Carriers therefor
    • B41N1/243—Stencils; Stencil materials; Carriers therefor characterised by the ink pervious sheet, e.g. yoshino paper

Definitions

  • a base of o en-texture, porous material of any suitablec aracter, such as yoshino paper is coated or impregnated with a coatmg material prepared by mixing together a solut1on of a phenolic resin in a suitable solvent, such asalcohol, with a solution of esters of polysaccharides, such as cellulose nitrate, cellulose acetate and mannan acetate, in a sultable solvent, such as acetone, .alcohol and amyl acetate.
  • a suitable solvent such asalcohol
  • the phenolic resin is a condensation prod:
  • other artificial or natural resins such as coumarone resin, ester gum, colophony and shellac
  • a tempering agent such as 011s, fats, fatty acids and waxes
  • an coloring matters such as a dye or a pigment
  • the yoshino paper may be coated or impregnated with the solution above described in any desired manner; or the composition may be added into the paper stuif in a mixing hollander.
  • the proportions of the ingredients of the composition may vary according to several pircumstances, an example bemg as fol-' ows:
  • the wax-coated stencil sheet which hither- ,to commonly used, has the great disadvantages of being liable to pass the ink through the cracks caused accidentally by the.usual handling, and particularly sensitive to the action of heat.
  • Other kinds of improved flexible stencil sheets are obtained by employing certain protein substances, particularly gelatine. It is very troublesome to preliminarily moisten the sheet in order to adapt it for making the stencil by pressure.
  • the iron parts ofthe writing machine are very lnjuriously'afiected by the moisture Yof the sheets.
  • the porous base is coated or impregnated with a material, not hitherto employed for this a purpose, including phenolic resin andesters of polysaccharides.
  • a material not hitherto employed for this a purpose, including phenolic resin andesters of polysaccharides.
  • the coated sheet as above described, being soft and flexible re- 'mains throughout an extended period of time practically unchanged without the drawback of becoming sticky or friable.
  • What I claim is y 1.
  • a stencil sheet the combination with a base of fibrous material, of an impregnating com osition comprising resin, estersof polysacc arides and a tempering agent.
  • esters of polysaccharides an agent.
  • a stencil sheet composed of a base of fibrous material and an impregnating composition comprising a phenolic resin, cellulose nitrate, stearine and castor oil.

Landscapes

  • Printing Plates And Materials Therefor (AREA)

Description

. Patented Jan. 8, 1929.
v UNITED STATES PATENT OFFICE.
snm'mo rionrr, or mono, 'JArAN.
srnncrr. snan'r.
llo'nrawing.
atmospheric influences pn using or storing,
and gives a large number of clear and sharp copies.
In carrying out the invention a base of o en-texture, porous material of any suitablec aracter, such as yoshino paper is coated or impregnated with a coatmg material prepared by mixing together a solut1on of a phenolic resin in a suitable solvent, such asalcohol, with a solution of esters of polysaccharides, such as cellulose nitrate, cellulose acetate and mannan acetate, in a sultable solvent, such as acetone, .alcohol and amyl acetate.
The phenolic resin is a condensation prod:
not of phenols and formaline or other aldehydes in the presence of a small amount of alkalies or acids on application of heat, and which is soluble in alcohol.
In the present invention other artificial or natural resins,such as coumarone resin, ester gum, colophony and shellac, may be added to the coating material. And, if necessary,'a suitable proportion of a tempering agent such as 011s, fats, fatty acids and waxes, an coloring matters, such as a dye or a pigment, may be added to the above described coating material.
The yoshino paper may be coated or impregnated with the solution above described in any desired manner; or the composition may be added into the paper stuif in a mixing hollander.
The proportions of the ingredients of the composition may vary according to several pircumstances, an example bemg as fol-' ows:
- Theterm esters of polysapcharides is inv Application filed May 18,
1926. Serial No. l09,973.
tended to include not only one of. definite esters of' polysaccharides, but also a mixture of them.
The wax-coated stencil sheet which hither- ,to commonly used, has the great disadvantages of being liable to pass the ink through the cracks caused accidentally by the.usual handling, and particularly sensitive to the action of heat. Other kinds of improved flexible stencil sheets are obtained by employing certain protein substances, particularly gelatine. It is very troublesome to preliminarily moisten the sheet in order to adapt it for making the stencil by pressure. Moreover the iron parts ofthe writing machine are very lnjuriously'afiected by the moisture Yof the sheets.
According to the present invention the porous base is coated or impregnated with a material, not hitherto employed for this a purpose, including phenolic resin andesters of polysaccharides. The coated sheet, as above described, being soft and flexible re- 'mains throughout an extended period of time practically unchanged without the drawback of becoming sticky or friable. By the pressure of a hand stylus or the blow of the type of a writing machine without moistening the sheet the clear characters may be easily produced thereon.
What I claim is y 1. In a stencil sheet, the combination with a base of fibrous material, of an impregnating com osition comprising resin, estersof polysacc arides and a tempering agent.
2, In a stencil sheet, the combination with a base of fibrous material, of an impregnating composition comprising a henolic resin,
esters of polysaccharides an agent.
3. A stencil sheet composed of a base of fibrous material and an impregnating composition comprising a phenolic resin, cellulose nitrate, stearine and castor oil.
4. A stencil 'sheet as specified in claim 3,
a tempering in which the said composition comprises'the' said substances in the following proportion; Phenolic resin, 20% solution; 200
Cellulose nitrate, 5% solution 100 Stearina 10 Castor'oil 20 In testimony whereof I aflix my si attire.
Y SHINJIRO H. RII
US109973A 1926-05-18 1926-05-18 Stencil sheet Expired - Lifetime US1698705A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US109973A US1698705A (en) 1926-05-18 1926-05-18 Stencil sheet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US109973A US1698705A (en) 1926-05-18 1926-05-18 Stencil sheet
GB1324126A GB274241A (en) 1926-05-25 1926-05-25 Improvements in or relating to stencil sheets

Publications (1)

Publication Number Publication Date
US1698705A true US1698705A (en) 1929-01-08

Family

ID=26249644

Family Applications (1)

Application Number Title Priority Date Filing Date
US109973A Expired - Lifetime US1698705A (en) 1926-05-18 1926-05-18 Stencil sheet

Country Status (1)

Country Link
US (1) US1698705A (en)

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