Patent US2054131A successfully refreshed from Google Patents.
US4157237A
Expired / Lapsed
US
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Molding element for producing thermoplastic film
Assignee: Tredegar Corp
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Filing: 1978-07-10
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Granted: 1979-06-05
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Expires: 1998-07-10
Abstract
Abstract A rotatable perforated molding element for embossing and/or perforating thermoplastic sheet or film, the molding element including a series of perforated strips having two parallel sides and two parallel ends, the strips being wrapped about a supporting drum in a manner such that the ends of the molding strips lie in a plane generally perpendicular to the axis of rotation of the molding element and the sides of the adjacent strips contact each other, and a method for connecting the rotatable perforated molding element to a supporting drum including wrapping a series of perforated strips having two parallel sides and two parallel ends about the supporting drum in a manner such that the ends of the molding element lie in a plane generally perpendicular to the axis of rotation of the molding element and the sides of the adjacent strips contact each other, and securing the ends of the strips to the drum.
Inventors
- 👤 Garland E. Raley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:42
CPC Classifications
F; F16; F16C; F16C13/00; B; B23; B23P; B23P15/00; B23P15/28; B26; B26F; B26F1/00; B26F1/26; B29; B29C; B29C59/00; B29C59/02; B29C59/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
81 words
A rotatable perforated molding element means for embossing and/or perforating thermoplastic sheet or film comprising a series of perforated strip means having two parallel sides and two parallel ends, said strip means being adapted for wrapping about a drum means for supporting said strips in a manner such that said ends of said strip means lie in a plane generally perpendicular to the axis of rotation of said molding element means and said sides of adjacent strip means contact each other.
Claim 2
Dependent Claim
81 words
A rotatable perforated molding element means for embossing and/or perforating thermoplastic sheet or film comprising a series of perforated strip means having two parallel sides and two parallel ends, said strip means being adapted for wrapping about a drum means for supporting said strips in a manner such that said ends of said strip means lie in a plane generally perpendicular to the axis of rotation of said molding element means and said sides of adjacent strip means contact each other.
Claim 3
Dependent Claim
20 words
The molding element means of claim 1 wherein said ends of said strip means are secured to said drum means.
Claim 4
Dependent Claim
22 words
The molding element means of claim 2 wherein said ends of said strip means are secured to said drum by spring means.
Claim 5
Dependent Claim
21 words
The molding element means of claim 2 wherein said ends are secured to said drum means by flexible first ring means.
Claim 6
Dependent Claim
35 words
The molding element means of claim 4 wherein second ring means is connected to said first ring means by resilient means to assist said first ring means in securing said ends to said drum means.
Claim 7
Dependent Claim
14 words
The molding element means of claim 5 wherein said resilient means is a spring.
Claim 8
Dependent Claim
35 words
The molding element means of claim 1 wherein said sides of said strip means form an angle with the axis of rotation of said molding element means of from about 5° to about 30° .
Claim 9
Dependent Claim
34 words
The molding element means of claim 1 wherein said sides of said strip means form an angle with the axis of rotation of said molding element means of from about 6° to about 10°.
Claim 10
Dependent Claim
20 words
The molding element means of claim 1 wherein said molding element means is adapted for rotation about said drum means.
Claim 11
Dependent Claim
23 words
The molding element means of claim 1 wherein said molding element means is adapted for securing to and rotating with said drum means.
Claim 12
Independent Claim
99 words
A method for connecting a rotatable perforated molding element means for embossing and/or perforating thermoplastic sheet or film to drum means for supporting said molding element means, comprising: a. wrapping a series of perforated strip means having two parallel sides and two parallel ends about said drum means in a manner such that: i. said ends of said strip means lie in a plane generally perpendicular to the axis of rotation of said molding element means, and, ii. said sides of adjacent strips contact each other; and, b. securing the ends of said strip means to said drum means.
Claim 13
Independent Claim
99 words
A method for connecting a rotatable perforated molding element means for embossing and/or perforating thermoplastic sheet or film to drum means for supporting said molding element means, comprising: a. wrapping a series of perforated strip means having two parallel sides and two parallel ends about said drum means in a manner such that: i. said ends of said strip means lie in a plane generally perpendicular to the axis of rotation of said molding element means, and, ii. said sides of adjacent strips contact each other; and, b. securing the ends of said strip means to said drum means.
Claim 14
Dependent Claim
28 words
The method of claim 1 wherein said ends of said strip means are placed in tension to maintain said strip means against the surface of said drum means.
Claim 15
Dependent Claim
42 words
The method of claim 11 wherein said parallel sides of said strip means are wrapped about said drum means so that said sides form an angle with the axis of rotation of said drum means of from about 5° to about 30°.
Claim 16
Dependent Claim
42 words
The method of claim 11 wherein said parallel sides of said strip means are wrapped about said drum means so that said sides form an angle with the axis of rotation of said drum means of from about 6° to about 10°.
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) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |