US4744936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for embossing thermoplastic material
Assignee: Nan Ya Plastics Corp
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Filing: 1986-01-30
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Granted: 1988-05-17
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Expires: 2006-01-30
Abstract
Abstract A process for embossing both sides of a sheet of thermoplastic material comprises sequentially passing the sheet between two pair of embossing-counter rollers at controlled relative conditions of temperature and pressure.
Inventors
- 👤 John J. Bittner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:58
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/04
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
166 words
A process for embossing both mutually opposing first and second sides of a sheet of thermoplastic material comprising: (a) forming an embossable sheet of thermoplastic material at a temperature such that both mutally opposing first and second sides of said embossable sheet of thermoplastic material are capable of being embossed; (b) passing said embossable sheet of thermoplastic material between a first pair of embossing-counter rollers maintained at a first temperature with a first pressure between said first embossing roller and said first counter roller thereby embossing the said first side of said embossable sheet of thermoplastic material; and thereafter; (c) passing said embossable sheet of thermoplastic material between a second pair of embossing-counter rollers maintained at a second temperature with a second pressure between said second embossing roller and said second counter roller thereby embossing said second side of said embossable sheet of thermoplastic material, provided that said first temperature is greater that said second temperature and said first pressure is less than said second pressure.
Claim 2
Dependent Claim
166 words
A process for embossing both mutually opposing first and second sides of a sheet of thermoplastic material comprising: (a) forming an embossable sheet of thermoplastic material at a temperature such that both mutally opposing first and second sides of said embossable sheet of thermoplastic material are capable of being embossed; (b) passing said embossable sheet of thermoplastic material between a first pair of embossing-counter rollers maintained at a first temperature with a first pressure between said first embossing roller and said first counter roller thereby embossing the said first side of said embossable sheet of thermoplastic material; and thereafter; (c) passing said embossable sheet of thermoplastic material between a second pair of embossing-counter rollers maintained at a second temperature with a second pressure between said second embossing roller and said second counter roller thereby embossing said second side of said embossable sheet of thermoplastic material, provided that said first temperature is greater that said second temperature and said first pressure is less than said second pressure.
Claim 3
Dependent Claim
26 words
The process of claim 1 wherein the embossing on said first side of said embossable sheet of thermoplastic material is not undesirably altered in step (c).
Claim 4
Dependent Claim
18 words
The process of claim 1 which further comprises (d) cooling the sheet of thermoplastic material from step (c).
Claim 5
Dependent Claim
40 words
The proces of claim 1 wherein said first and second pair of embossing-counter rollers are located in close proximity to minimize the temperature loss of said embossable sheet of thermoplastic material as it moves from step (b) to step (c).
Claim 6
Dependent Claim
22 words
The process of claim 1 wherein step (a) comprises passing the thermoplastic material through a series of flat openings between heated rollers.
Claim 7
Dependent Claim
17 words
The process of claim 1 wherein said the thermoplastic material comprises a polymer made from vinyl chloride.
Claim 8
Dependent Claim
21 words
The process of claim 6 wherein said first temperature is in the range of about 60° C. to about 90° C.
Claim 9
Dependent Claim
21 words
The process of claim 6 wherein said first pressure is in the range of about 120 psi. to about 190 psi.
Claim 10
Dependent Claim
21 words
The process of claim 6 wherein said second temperature is in the range of about 30° C. to about 50° C.
Claim 11
Dependent Claim
21 words
The process of claim 6 wherein said second pressure is in the range of about 320 psi. to about 390 psi.
Claim 12
Dependent Claim
67 words
The process of claim 6 wherein said first temperature is in the range of about 70° C. to about 80° C., said first pressure is in the range of about 142 psi. to about 170 psi., said second temperature is in the range of about 35° C. to about 45° C., and said second pressure is in the range of about 341 psi. to about 370 psi.
Claim 13
Dependent Claim
21 words
The process of claim 11 wherein said first temperature is about 75° C. and said second temperature is about 40° C.
Claim 14
Dependent Claim
40 words
The process of claim 4 wherein the distance between the point at which said first side is embossed and the point at which said second side is embossed is in the range of about 12 inches to about 50 inches.
Claim 15
Dependent Claim
20 words
The process of claim 13 wherein said distance is in the range of about 20 inches to about 30 inches.
Claim 16
Dependent Claim
12 words
The process of claim 14 wherein said distance is about 25 inches.
Claim 17
Dependent Claim
40 words
The process of claim 11 wherein the distance between the point at which said first side is embossed and the point at which said second side is embossed is in the range of about 12 inches to about 50 inches.
Claim 18
Dependent Claim
20 words
The process of claim 16 wherein said distance is in the range of about 20 inches to about 30 inches.
Claim 19
Dependent Claim
12 words
The process of claim 16 wherein said distance is about 25 inches.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |