Patent US4167130A successfully refreshed from Google Patents.
US4167130A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for cutting sheet moulding compound reinforcing strands
Assignee: Owens Corning
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Filing: 1977-12-22
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Granted: 1979-09-11
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Expires: 1997-12-22
Abstract
Abstract The invention relates to a method for cutting continuous reinforcing material in a sheet molding compound comprising passing the sheet molding compound into contact with a plurality of blades projecting from the exterior surface of a rotating roll. The blades pierce the sheet molding compound to sever the continuous reinforcing material located therein as the sheet molding compound is advanced past the roll.
Inventors
- 👤 Everett R. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:49
CPC Classifications
B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/08; B29C70/081; B26; B26F; B26F1/00; B26F1/18; B26F1/20; B29B; B29B15/00; B29B15/08; B29C70/28; B29C70/40; B29C70/50; B29C70/504; B29C70/508; B60; B60C; B60C9/00; B60C9/18; B60C9/1821; B29C2793/00; B29C2793/0081; B29K; B29K2105/00; B29K2105/06; B29K2105/08; B29K2105/10; B29K2105/101; B29K2105/12; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0237; Y10T83/04; Y10T83/0481; Y10T83/0524; Y10T83/929; Y10T83/9372; Y10T83/9408
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
55 words
A method of cutting continuous reinforcing strands positioned in a sheet of sheet molding compound comprising: (a) contacting said sheet with cutting edges; (b) piercing said sheet with said cutting edges to form a plurality of discontinuous cuts extending along the width of said sheet and to cut said reinforcing material contained in said sheet.
Claim 2
Independent Claim
55 words
A method of cutting continuous reinforcing strands positioned in a sheet of sheet molding compound comprising: (a) contacting said sheet with cutting edges; (b) piercing said sheet with said cutting edges to form a plurality of discontinuous cuts extending along the width of said sheet and to cut said reinforcing material contained in said sheet.
Claim 3
Dependent Claim
21 words
The method of claim 1 in which said cuts are positioned adjacently along the length of said sheet in step-wise manner.
Claim 4
Dependent Claim
38 words
The method of claim 1 in which said cuts in adjacent rows are positioned along an imaginary line forming an angle with the longitudinal axis of said sheet within the range of from about 30° to about 60°.
Claim 5
Dependent Claim
20 words
The method of claim 1 in which said cuts sever substantially all of said continuous reinforcing material in said sheet.
Claim 6
Dependent Claim
13 words
The method of claim 1 in which said sheet comprises discontinuous reinforcing material.
Claim 7
Dependent Claim
19 words
The method of claim 1 in which said sheet is cut along its longitudinal axis subsequent to step (b).
References Cited (Backward Citations)
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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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |