US3627858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for selectively foaming the surface of a thermoplastic article by use of a laser
Assignee: Monsanto Research Corp
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Filing: 1969-11-24
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Granted: 1971-12-14
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Expires: 1989-11-24
Abstract
Abstract A method for foaming a design on the surface of a thermoplastic article, using laser radiation to produce an embossed surface with sharp definition.
Inventors
- 👤 Leo P Parts
- 👤 Jules Pinsky
- 👤 Edgar E Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:54
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/02; B; B23; B23K; B23K26/00; B23K26/0006; B23K26/08; B23K26/0823; B23K26/352; B23K26/355; B29; B29C; B29C44/00; B29C44/02; B29C44/04; B29C44/34; B29C44/3415; B29C44/3442; B29C44/3446; B29C44/3453; B29C44/56; B23K2103/00; B23K2103/30; B23K2103/42; Y; Y10; Y10S; Y10S283/00; Y10S283/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24628; Y10T428/24736; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249988
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
24 words
A method of claim 1 wherein the radiation from a laser is projected onto the steeped surface of the article in a predetermined pattern.
Claim 2
Dependent Claim
121 words
A method of claim 1 for forming a band of foam on the surface of a polystyrene cup which comprises: a. steeping the polystyrene cup in a bath of trichloromonofluoromethane at room temperature for about 8 seconds; b. removing the cup from the trichloromonofluoromethane bath; c. placing the cup at the center of a rotating table so that the cup wall moves at a linear rate in the range of about 50 to 100 mm. per minute; d. inserting a mask having a predetermined design between a laser and the cup; and e. foaming a band on the cup surface by projecting the radiation from the laser at an output of about 5 watts on the surface of the rotating cup.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |