Patent US3970501A successfully refreshed from Google Patents.
US3970501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating a number of sheets into groups
Assignee: Fujifilm Holdings Corp
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Filing: 1974-12-11
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Granted: 1976-07-20
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Expires: 1994-12-11
Abstract
Abstract A process for separating a number of sheets into groups of sheets comprising coating an adhesive composition on an edge of a stack of the sheets fanning the sheets. The adhesive composition contains a naphthalene sulfonic acid-formaldehyde condensation product and a water-soluble polymer material.
Inventors
- 👤 Akio Miyamoto
- 👤 Keiso Saeki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:06
CPC Classifications
C; C09; C09J; C09J161/00; B; B41; B41M; B41M5/00; B41M5/124; C09J201/00; C08; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S462/00; Y10S462/90; Y10T; Y10T428/00; Y10T428/24; Y10T428/24777; Y10T428/24793
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
A process for separating a number of pressure sensitive copying papers into groups which comprises (1) coating an adhesive composition comprising a naphthalene sulfonic acid-formaldehyde condensation product and a water-soluble polymer on an edge of a stack assembly of said copying papers and then (2) fanning said copying papers; said naphthalene sulfonic acid-formaldehyde condensation product comprising about 5 to 40% by weight of the adhesive composition and said water-soluble polymer, which is selected from the group consisting of natural polymer, a semi-synthetic polymer and a synthetic polymer, comprising about 0.1 to 20% by weight of the adhesive composition.
Claim 2
Dependent Claim
98 words
A process for separating a number of pressure sensitive copying papers into groups which comprises (1) coating an adhesive composition comprising a naphthalene sulfonic acid-formaldehyde condensation product and a water-soluble polymer on an edge of a stack assembly of said copying papers and then (2) fanning said copying papers; said naphthalene sulfonic acid-formaldehyde condensation product comprising about 5 to 40% by weight of the adhesive composition and said water-soluble polymer, which is selected from the group consisting of natural polymer, a semi-synthetic polymer and a synthetic polymer, comprising about 0.1 to 20% by weight of the adhesive composition.
Claim 3
Dependent Claim
66 words
The process according to claim 1, wherein the naphthalene sulfonic acid-formaldehyde condensation product is represented by the formula: ##SPC8## wherein R, which may be the same or different and a plurality of which may be present on the naphthalene nuclei, is a hydrogen atom or an alkyl group; X is a hydrogen atom, an alkali metal atom, or an ammonium group; and n is an integer.
Claim 4
Dependent Claim
18 words
The process according to claim 2, wherein R is an alkyl group containing 1 to 4 carbon atoms.
Claim 5
Dependent Claim
12 words
The process according to claim 2, wherein X is a sodium atom.
Claim 6
Dependent Claim
12 words
The process according to claim 2, wherein X is a potassium atom.
Claim 7
Dependent Claim
16 words
The process according to claim 2, wherein n is an integer of from 1 to 5.
Claim 8
Dependent Claim
29 words
The adhesive composition according to claim 1, wherein the water-soluble polymer material is selected from the group consisting of a natural polymer, a semi-synthetic polymer, and a synthetic polymer.
Claim 9
Dependent Claim
36 words
The process according to claim 1, wherein the natural polymer is selected from the group consisting of gelatin, casein, agar agar, albumin, shellac, starch, dextin, an alginic acid salt, gum arabic, pectin, tragacanth gum and gluten.
Claim 10
Dependent Claim
34 words
The process according to claim 1, wherein the semi-synthetic polymer is selected from the group consisting of carboxymethyl cellulose, phosphoric acid starch, maleated starch, cyanoethyl carboxymethyl starch, hydroxyethyl starch, dialdehyde starch, and oxidized starch.
Claim 11
Dependent Claim
54 words
The process according to claim 1, wherein the synthetic polymer is selected from the group consisting of polyvinyl alcohol, polyacrylamide, polyvinyl pyrrolidone, polyethylene oxide, polyvinyl methyl ether, an acrylic acid-acrylamide copolymer, a styrene-methacrylic acid copolymer, a vinyl acetate-acrylic acid copolymer, a dimethyl itaconate-acrylic acid copolymer, an acrylonitrile-acrylic acid copolymer, and an acrylamide-styrene-acrylic acid copolymer.
Claim 12
Dependent Claim
35 words
The process according to claim 1, wherein said adhesive composition includes a surface active agent in a proportion of 0.1 to 5% by weight based upon the weight of the naphthalene sulfonic acid-formaldehyde condensation product.
References Cited (Backward Citations)
US3393925A
Cited
US3216926A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |