US5167891A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the manufacture of curved plastic pieces
Assignee: Individual
•
Filing: 1991-12-30
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Granted: 1992-12-01
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Expires: 2011-12-30
Abstract
Abstract In the method for the manufacture of curved plastic pieces, such as brassiere underwires, the plastic pieces are formed from hot plastic material in a selected mold and are cooled to solidify the plastic material. In the improved method, a continuous thermoplastic wire in its thermoplastically formable state is coiled into a coil and simultaneously cooled thus forming turns of a solidified coil. The turns are subsequently cut along the axis of the coil over the entire length of the coil to produce the curved plastic pieces.
Inventors
- 👤 Henk Dijkman, Sr.
- 👤 Henk Dijkman, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:19
CPC Classifications
A; A41; A41C; A41C3/00; A41C3/12; A41C3/122; A41C3/128; B; B29; B29C; B29C53/00; B29C53/02; B29C53/12; B29C69/00; B29C69/001; B29C69/002; B29C69/003; B29L; B29L2031/00; B29L2031/48; B29L2031/4871; B29L2031/4885; Y; Y10; Y10S; Y10S264/00; Y10S264/40
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
A method for the manufacture of curved plastic pieces, in which said plastic pieces are formed from hot plastic material in a selected mold and are cooled to solidify said plastic material; said method further comprising the steps of: coating two continuous thermoplastic wire cores with a plastic coating to form a continuous thermoplastic wire; continuously coiling said continuous thermoplastic wire in its thermoplastically formable state into a coil and simultaneously cooling said thermoplastic wire thus forming turns of solidified coil; and subsequently cutting said turns at two locations that are 180° spaced from one another parallel to an axis of said coil along the entire length of said coil to produce single ones of said curved plastic pieces.
Claim 2
Independent Claim
119 words
A method for the manufacture of curved plastic pieces, in which said plastic pieces are formed from hot plastic material in a selected mold and are cooled to solidify said plastic material; said method further comprising the steps of: coating two continuous thermoplastic wire cores with a plastic coating to form a continuous thermoplastic wire; continuously coiling said continuous thermoplastic wire in its thermoplastically formable state into a coil and simultaneously cooling said thermoplastic wire thus forming turns of solidified coil; and subsequently cutting said turns at two locations that are 180° spaced from one another parallel to an axis of said coil along the entire length of said coil to produce single ones of said curved plastic pieces.
Claim 3
Dependent Claim
24 words
A method according to claim 1, in which said continuous plastic wire is directly supplied by an extrusion apparatus which produces said plastic wire.
Claim 4
Dependent Claim
20 words
A method according to claim 1, which includes the step of spraying water onto said plastic wire to cool same.
Claim 5
Dependent Claim
15 words
A method according to claim 1 in which said plastic wire core consists of polyester.
Claim 6
Dependent Claim
48 words
A method according to claim 1, in which a thicker one of said thermoplastic wire cores is disposed on the outer side of the curvature of said curved plastic piece and a thinner one of said thermoplastic wire cores is disposed on the inner side of said curvature.
Claim 7
Dependent Claim
15 words
A method according to claim 1, in which said plastic coating consists of polyacetal resin.
Claim 8
Dependent Claim
14 words
A method according to claim 1, in which said plastic coating consists of polycarbonate.
Claim 9
Dependent Claim
13 words
A method according to claim 1, in which said wire cores are extrusion-coated.
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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) | 1995-12-01 | 1996-06-01 | 1996-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-01 | 2000-06-01 | 2000-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-01 | 2004-06-01 | 2004-12-01 | $7700.00 | Window Closed / Lapsed |