US3883627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Molding process for producing subsequent articles from a master
Assignee: Cook Paint and Varnish Co
•
Filing: 1973-06-06
•
Granted: 1975-05-13
•
Expires: 1993-06-06
Abstract
Abstract A molding process is provided for molding articles in the form of an original article or master by placing a heat curable elastomeric material which does not cause any inhibition between the master and the curable polymeric material, forming a polymeric material in situ as a foamed polymer backing having a density of at least two pounds per cubic foot to force the heat curable elastomeric material against the master, curing the heat curable elastomeric material, removing the cured polymer material and foamed polymer backing from the original master, and employing the cured elastomeric material and foam backing for molding subsequent articles in the shape of the master. The heat curable elastomeric material may be any heat curable material such as silicon gum rubber. The polymeric foam backing and the subsequently molded articles are preferably made of polyurethane.
Inventors
- 👤 Martin Fitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:30
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/02; B29C44/12; B29C44/14; B29C44/16; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/40; B29C33/405; B29K; B29K2075/00; Y; Y10; Y10S; Y10S264/00; Y10S264/77
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
4 words
A MOLDING PROCESS COMRISING:
Claim 2
Dependent Claim
4 words
A MOLDING PROCESS COMRISING:
Claim 3
Dependent Claim
50 words
PLACING A HEAT CURABLE ELASTOMERIC SHEET MATERIAL COMPRISING CURING AGENT AND URETHANE ELASTOMERIC GUM STOCK OR SILICONE GUM STOCK OVER A MASTER WHICH IS TO BE COPIED, SAID HEAT CURABLE ELASTOMERIC SHEET MATERIAL BEING ONE WHICH DOES NOT CAUSE INHIBITION BETWEEN THE MASTER AND THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL,
Claim 4
Dependent Claim
50 words
PLACING A HEAT CURABLE ELASTOMERIC SHEET MATERIAL COMPRISING CURING AGENT AND URETHANE ELASTOMERIC GUM STOCK OR SILICONE GUM STOCK OVER A MASTER WHICH IS TO BE COPIED, SAID HEAT CURABLE ELASTOMERIC SHEET MATERIAL BEING ONE WHICH DOES NOT CAUSE INHIBITION BETWEEN THE MASTER AND THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL,
Claim 5
Dependent Claim
8 words
VACUUM DRAWING THE SHEET MATERIAL AGAINST THE MASTER
Claim 6
Dependent Claim
8 words
VACUUM DRAWING THE SHEET MATERIAL AGAINST THE MASTER
Claim 7
Dependent Claim
8 words
vacuum drawing the sheet material against the master;
Claim 8
Dependent Claim
8 words
vacuum drawing the sheet material against the master;
Claim 9
Dependent Claim
26 words
A process according to claim 1, wherein the heat curable elastomeric sheet material is silicone gum rubber stock having a thickness of one-sixteenth to one-half inches.
Claim 10
Dependent Claim
20 words
A process according to claim 1, wherein the curing is carried out at a temperature of at least 250* F.
Claim 11
Dependent Claim
8 words
enclosing the master sheet material within a frame;
Claim 12
Dependent Claim
8 words
enclosing the master sheet material within a frame;
Claim 13
Dependent Claim
8 words
ENCLOSING THE MASTER SHEET MATERIAL WITHIN A FRAME,
Claim 14
Dependent Claim
8 words
ENCLOSING THE MASTER SHEET MATERIAL WITHIN A FRAME,
Claim 15
Dependent Claim
33 words
THEN FORMING A FOAMED POLYMERIC BACKING IN SITU TO FORCE THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL AGAINST THE MASTER TO COPY THE SHAPE OF THE MASTER IN THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL,
Claim 16
Dependent Claim
33 words
THEN FORMING A FOAMED POLYMERIC BACKING IN SITU TO FORCE THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL AGAINST THE MASTER TO COPY THE SHAPE OF THE MASTER IN THE HEAT CURABLE ELASTOMERIC SHEET MATERIAL,
Claim 17
Dependent Claim
33 words
then forming a foamed polymeric backing in situ to force the heat curable elastomeric sheet material against the master to copy the shape of the master in the heat curable elastomeric sheet material;
Claim 18
Dependent Claim
33 words
then forming a foamed polymeric backing in situ to force the heat curable elastomeric sheet material against the master to copy the shape of the master in the heat curable elastomeric sheet material;
Claim 19
Dependent Claim
21 words
A process according to claim 1, wherein the curing is carried out by the exothermic reaction of the foamed polymeric backing.
Claim 20
Dependent Claim
26 words
A method according to claim 1, wherein the foamed polymeric backing is a polyurethane having a density in the range of 2-60 lbs. per cubic foot.
Claim 21
Dependent Claim
12 words
curing the elastomeric sheet material in the shape of the master; and
Claim 22
Dependent Claim
12 words
curing the elastomeric sheet material in the shape of the master; and
Claim 23
Dependent Claim
12 words
CURING THE ELASTOMERIC SHEET MATERIAL IN THE SHAPE OF THE MASTER, AND
Claim 24
Dependent Claim
12 words
CURING THE ELASTOMERIC SHEET MATERIAL IN THE SHAPE OF THE MASTER, AND
Claim 25
Dependent Claim
18 words
MOLDING ARTICLES IN THE SHAPE OF THE MASTER IN A MOLD CONSTRUCTED FROM THE CURED ELASTOMERIC SHEET MATERIAL.
Claim 26
Dependent Claim
18 words
MOLDING ARTICLES IN THE SHAPE OF THE MASTER IN A MOLD CONSTRUCTED FROM THE CURED ELASTOMERIC SHEET MATERIAL.
Claim 27
Dependent Claim
18 words
molding articles in the shape of the master in a mold constructed from the cured elastomeric sheet material.
Claim 28
Dependent Claim
18 words
molding articles in the shape of the master in a mold constructed from the cured elastomeric sheet material.
Claim 29
Dependent Claim
26 words
A method according to claim 1 wherein the molded articles are formed of polyurethane having a density in the range of 2-60 lbs. per cubic foot.
References Cited (Backward Citations)
US3301926A
Cited
US3248758A
Cited
US3596316A
Cited
US3615071A
Cited
US3703572A
Cited
US3723584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |