Patent US4710334A successfully refreshed from Google Patents.
US4710334A
Expired / Lapsed
US
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Method of preparing a template
Assignee: Advanced Tool Technologies Inc
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Filing: 1986-05-01
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Granted: 1987-12-01
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Expires: 2006-05-01
Abstract
Abstract A method of preparing a template for a product from a sample of the product. The ultimate template is either larger or smaller in size than the sample. Initially, a mixture of liquid rubber and a curing agent is prepared. The sample is then covered with the mixture and the mixture is permitted to harden to form a temporary mold. The sample is then removed from the mold to form a cavity, and the size of the cavity in the mold is altered to either increase or decrease its dimensions. Finally, a hardenable material, such as an epoxy resin, is poured into the mold to form the template. If an enlarged template is to be formed, the size of the cavity of the mold is increased by immersing the mold in an organic solvent bath. If the size of the mold is to be decreased, an organic solvent is added to the mixture before formation of the mold, and after the mold has been formed, it is heated to shrink the size of the mold.
Inventors
- 👤 James J. Rossetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:49
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/0009; B29C33/00; B29C33/38; B29C33/3842; B29C33/3857; B29C33/3892; B29C33/40; Y; Y10; Y10S; Y10S264/00; Y10S264/78
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
102 words
A method of preparing a template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber and a curing agent, b. covering the sample with the mixture, c. permitting the mixture to harden about the sample to form a mold, d. removing the sample from the mold to form a cavity in the mold, e. altering the size of the cavity of the mold, by proportionately and permanently changing the dimensions of the mold after the mixture has hardened, and f. pouring a hardenable material into the mold to form the template.
Claim 2
Independent Claim
102 words
A method of preparing a template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber and a curing agent, b. covering the sample with the mixture, c. permitting the mixture to harden about the sample to form a mold, d. removing the sample from the mold to form a cavity in the mold, e. altering the size of the cavity of the mold, by proportionately and permanently changing the dimensions of the mold after the mixture has hardened, and f. pouring a hardenable material into the mold to form the template.
Claim 3
Dependent Claim
47 words
A method according to claim 1 in which method step "e" comprises enlarging the size of the cavity of the mold, and further includes immersing the mold in a bath of an enlargant for a predetermined period of time to proportionally increase the size of the mold.
Claim 4
Dependent Claim
13 words
A method according to claim 2 in which the bath is a solvent.
Claim 5
Dependent Claim
13 words
A method according to claim 3 in which the solvent is mineral spirits.
Claim 6
Dependent Claim
12 words
A method according to claim 3 in which the solvent is naphtha.
Claim 7
Dependent Claim
22 words
A method according to claim 1 in which method step "c" includes heating the mixture to between 200° F. and 250° F.
Claim 8
Dependent Claim
38 words
A method according to claim 1 in which the hardenable material is an epoxy resin, and method step "f" includes pouring the liquid epoxy resin into the mold and permitting the resin to harden to form the template.
Claim 9
Dependent Claim
18 words
A method according to claim 1 in which the liquid rubber of method step "a" comprises silicone rubber.
Claim 10
Dependent Claim
23 words
A method according to claim 1 in which method step "a" includes mixing ten parts of liquid rubber with one part curing agent.
Claim 11
Dependent Claim
52 words
A method according to claim 1 in which method step "a" includes adding a liquid reductant to the mixture, and method step "e" comprises reducing the size of the cavity of the mold by evaporating a predetermined portion of the reductant from the mold to proportionally reduce the size of the mold.
Claim 12
Dependent Claim
28 words
A method according to claim 10 including the method step after method step "a" of placing the mixture in a vacuum chamber to remove any entrapped gas bubbles.
Claim 13
Dependent Claim
29 words
A method according to claim 10 including the method step after method step "b" of placing the covered sample in a vacuum chamber to remove any entrapped gas bubbles.
Claim 14
Dependent Claim
12 words
A method according to claim 10 in which the reductant is naptha.
Claim 15
Dependent Claim
13 words
A method according to claim 10 in which the reductant is mineral spirits.
Claim 16
Dependent Claim
24 words
A method according to claim 10 in which the reductant is added in an amount equal in volume to that of the liquid rubber.
Claim 17
Dependent Claim
22 words
A method according to claim 10 in which method step "e" further includes heating the mold to accelerate evaporation of the reductant.
Claim 18
Independent Claim
114 words
A method of preparing an enlarged template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber and a curing agent, b. covering the sample with the mixture, c. permitting the mixture to harden about the sample to form a mold, d. removing the sample from the mold to form a cavity in the mold, e. enlarging the size of the cavity of the mold by immersing the mold in a bath of an enlargant for a predetermined period of time to proportionally and permanently increase the size of the mold, and f. pouring a hardenable material into the mold to form the template.
Claim 19
Independent Claim
114 words
A method of preparing an enlarged template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber and a curing agent, b. covering the sample with the mixture, c. permitting the mixture to harden about the sample to form a mold, d. removing the sample from the mold to form a cavity in the mold, e. enlarging the size of the cavity of the mold by immersing the mold in a bath of an enlargant for a predetermined period of time to proportionally and permanently increase the size of the mold, and f. pouring a hardenable material into the mold to form the template.
Claim 20
Dependent Claim
44 words
A method according to claim 17 in which the liquid rubber of method step "a" comprises silicone rubber and the rubber and the curing agent are respectively mixed in a 10:1 ratio, and in which the enlargant of method step "e" comprises a solvent.
Claim 21
Independent Claim
125 words
A method of preparing a reduced template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber, a curing agent and a reductant, b. placing the mixture in a vacuum chamber to remove any entrapped gas bubbles, c. covering the sample with the mixture, d. permitting the mixture to harden about the sample to form a mold, e. removing the sample from the mold to form a cavity in the mold, f. reducing the size of the cavity of the mold by evaporating a predetermined portion of the reductant from the mold to proportionally and permanently reduce the size of the mold, and g. pouring a hardenable material into the mold to form the template.
Claim 22
Independent Claim
125 words
A method of preparing a reduced template for a product from a sample of the product, comprising the steps of a. preparing a mixture of liquid rubber, a curing agent and a reductant, b. placing the mixture in a vacuum chamber to remove any entrapped gas bubbles, c. covering the sample with the mixture, d. permitting the mixture to harden about the sample to form a mold, e. removing the sample from the mold to form a cavity in the mold, f. reducing the size of the cavity of the mold by evaporating a predetermined portion of the reductant from the mold to proportionally and permanently reduce the size of the mold, and g. pouring a hardenable material into the mold to form the template.
Claim 23
Dependent Claim
54 words
A method according to claim 19 in which the liquid rubber of method step "a" comprises silicone rubber, the reductant comprises naphtha, and the silicone rubber, naphtha and curing agent are respectively mixed in a 10:10:1 ratio, and in which method step "f" further includes heating the mold to accelerate evaporation of the naphtha.
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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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |