US3987137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a direct inking platen
Assignee: International Business Machines Corp
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Filing: 1975-02-27
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Granted: 1976-10-19
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Expires: 1995-02-27
Abstract
Abstract A method of making an inking platen suitable for use with impact printers and comprising a unitary microporous nylon body having a thin microporous flexible tough outer skin portion, and a ribbon affixed to the skin; the ribbon being woven of nylon fibers, the body being compression molded from a predetermined particulate nylon blend of a minority of high mesh nylon and the remainder of low mesh nylon.
Inventors
- 👤 Edward W. Neumann
- 👤 William C. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
B; B41; B41F; B41F31/00; B41F31/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A method for making a unitary microporous direct inking platen nylon body having a porosity between from about 5% to about 15% and an integral microporous outer skin on the order of 1/5000 inch in thickness, the micropores being sufficient to transport an oil based liquid throughout said body by capillary action, comprising the steps of: forming a particulate blend of thirty percent nominal eighty mesh nylon 6, 6 with 70 percent nominal 20 mesh nylon 6, 6; and compression molding the blend to achieve particle bonding by pressing said blend for more than ten but less than 20 minutes at a temperature from about 350° F to about 420° F and at a pressure on the blend during molding from about 10,000 psia to about 15,000 psia, thereby forming a unitary, microporous body having an integral microporous outer skin on the order of 1/5000 inch in thickness.
Claim 2
Independent Claim
148 words
A method for making a unitary microporous direct inking platen nylon body having a porosity between from about 5% to about 15% and an integral microporous outer skin on the order of 1/5000 inch in thickness, the micropores being sufficient to transport an oil based liquid throughout said body by capillary action, comprising the steps of: forming a particulate blend of thirty percent nominal eighty mesh nylon 6, 6 with 70 percent nominal 20 mesh nylon 6, 6; and compression molding the blend to achieve particle bonding by pressing said blend for more than ten but less than 20 minutes at a temperature from about 350° F to about 420° F and at a pressure on the blend during molding from about 10,000 psia to about 15,000 psia, thereby forming a unitary, microporous body having an integral microporous outer skin on the order of 1/5000 inch in thickness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |