US3801406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming gaskets
Assignee: Indesit Industria Elettrodomestici Italiana SpA
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Filing: 1971-11-03
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Granted: 1974-04-02
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Expires: 1991-11-03
Abstract
Abstract A method for making gaskets by producing a continuous strip of sheet stock either by calendaring or extruding a mixture of basic raw materials. At least one additional layer of material can be bonded to the continuous strip to produce a laminated strip. The continuous or laminated strip is then punched to form blanks having dimensions slightly greater than the dimensions of the desired gasket and vulcanizing the blanks under pressure. Gaskets are then formed from the vulcanized blanks.
Inventors
- 👤 G Debenedetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:43
CPC Classifications
B; B29; B29B; B29B17/00; B29B17/0005; B29D; B29D99/00; B29D99/0053; B29K; B29K2021/00; B29L; B29L2031/00; B29L2031/26; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/62; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1084
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
95 words
A method of making gaskets for industrial use from a mixture of load bearing raw materials, said method comprising the steps of: producing a continuous strip of composite material from said mixture of said raw materials, said strip having a thickness slightly greater than the desired thickness of said gaskets to be produced therefrom, punching said continuous strip to form blanks having dimensions slightly greater than the dimensions of at least one of said gaskets to be made therefrom, vulcanising said blanks under pressure, and forming gaskets to the required dimension from said vulcanised blanks.
Claim 2
Independent Claim
95 words
A method of making gaskets for industrial use from a mixture of load bearing raw materials, said method comprising the steps of: producing a continuous strip of composite material from said mixture of said raw materials, said strip having a thickness slightly greater than the desired thickness of said gaskets to be produced therefrom, punching said continuous strip to form blanks having dimensions slightly greater than the dimensions of at least one of said gaskets to be made therefrom, vulcanising said blanks under pressure, and forming gaskets to the required dimension from said vulcanised blanks.
Claim 3
Dependent Claim
22 words
The method of claim 1 wherein said continuous strip of said material is produced from said mixture of raw materials by calendering.
Claim 4
Dependent Claim
22 words
The method of claim 1 wherein said continuous strip of said material is produced from said mixture of raw materials by extrusion.
Claim 5
Dependent Claim
32 words
The method of claim 1 further comprising the step of bonding at least one layer of additional material to said continuous strip of said material produced from said mixture of raw materials.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein vulcanisation of said blanks is effected continuously during performance of said method.
Claim 7
Dependent Claim
14 words
The method of claim 1 wherein vulcanisation of said blanks is effected in batches.
Claim 8
Dependent Claim
22 words
The method of claim 1 wherein said blanks are formed of a size whereby a plurality of gaskets can be cut therefrom.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |