US3962392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of molding moldable textile fabrics
Assignee: Stahl Urban Co
•
Filing: 1974-11-15
•
Granted: 1976-06-08
•
Expires: 1994-11-15
Abstract
Abstract Molding thermoformable textile fabric (knit, woven or otherwise), and particularly stretch fabric, into a permanent three-dimensional shape by vacuum-molding in a cavity in a vacuum mold, wherein flow of air through the fabric is blocked to enable it to be vacuum-formed by means of a layer of substantially air-impervious thermoformable sheet plastic material applied over the fabric. The plastic is heated to thermoforming temperature, the plastic and fabric are vacuum-formed in the mold, the molded plastic layer with the molded fabric thereon being removed from the mold and the molded plastic layer being utilized as a form for holding the molded fabric in its molded shape for a sufficient period of time to stabilize the fabric in its molded shape. The molded plastic layer is cooled within the mold via a flow of cooling air.
Inventors
- 👤 William R. Conner, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:15
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/26; B29C51/44; B29C35/00; B29C35/16; B29C51/14; B29C51/145; B29C51/261; B29C51/262; B29C51/28; B29C2035/1658; B29C43/00; B29C43/02; B29C43/10; B29C43/12; B29K; B29K2313/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
238 words
The method of forming thermoformable textile fabric into a permanent three-dimensional shape comprising applying a layer of substantially air impervious thermoformable sheet plastic material to one face of the fabric, applying the fabric with the plastic layer thereon to a mold having a cavity conforming to the three-dimensional shape desired with the fabric toward the cavity, heating the plastic layer to thermoforming temperature, applying vacuum to the cavity to draw the plastic layer and the fabric into the cavity thereby to mold the fabric and also said plastic layer to the shape of the cavity, and releasing the vacuum and removing the molded plastic layer with the molded fabric thereon from the mold, and cooling the plastic layer, wherein the mold is heated to heat the fabric to the forming temperature when the fabric is drawn into the cavity and contacts the surface of the mold within the cavity, the vacuum is reduced after the fabric contacts said surface to cause the fabric to withdraw slightly from said surface, the plastic layer is cooled in the cavity while the reduced vacuum is applied to the cavity, the vacuum is then released, and the molded plastic layer and molded fabric are removed together from the mold and the molded fabric retained on the molded plastic layer to hold the molded fabric in its molded shape for a sufficient period of time to stabilize the fabric in its molded shape.
Claim 2
Independent Claim
238 words
The method of forming thermoformable textile fabric into a permanent three-dimensional shape comprising applying a layer of substantially air impervious thermoformable sheet plastic material to one face of the fabric, applying the fabric with the plastic layer thereon to a mold having a cavity conforming to the three-dimensional shape desired with the fabric toward the cavity, heating the plastic layer to thermoforming temperature, applying vacuum to the cavity to draw the plastic layer and the fabric into the cavity thereby to mold the fabric and also said plastic layer to the shape of the cavity, and releasing the vacuum and removing the molded plastic layer with the molded fabric thereon from the mold, and cooling the plastic layer, wherein the mold is heated to heat the fabric to the forming temperature when the fabric is drawn into the cavity and contacts the surface of the mold within the cavity, the vacuum is reduced after the fabric contacts said surface to cause the fabric to withdraw slightly from said surface, the plastic layer is cooled in the cavity while the reduced vacuum is applied to the cavity, the vacuum is then released, and the molded plastic layer and molded fabric are removed together from the mold and the molded fabric retained on the molded plastic layer to hold the molded fabric in its molded shape for a sufficient period of time to stabilize the fabric in its molded shape.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein the plastic layer is cooled in the cavity by flow of air on the plastic layer.
Claim 4
Dependent Claim
19 words
The method of claim 2 wherein, just before the vacuum is released, the flow of cooling air is increased.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |