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US3578764A Expired / Lapsed US ⏱️ 0.0 years remaining

Oven door seal and method of making same

Assignee: Federal Mogul Systems Protection Group Inc
•
Filing: 1969-07-23
•
Granted: 1971-05-18
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Expires: 1989-07-23
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Abstract

Abstract A heat-resistant gasket is provided for sealing a space between a door and a jamb around an access opening in an oven of the self-cleaning type. The gasket has a braided fiberglass jacket which has a line of juncture extending longitudinally to dispose a resilient metal mesh tubular sealing element and a tubular mounting element in spaced parallel relation therein, the mounting element being engaged by clamping means on the door which secures it thereto to dispose the sealing element in the space to be sealed. In addition, there is disclosed a method for fabricating the gasket which includes the steps of braiding the fiberglass jacket around both a knitted wire mesh core in the tubular sealing element and a paper core in the tubular mounting element as the elements advance in spaced parallel relation and joining the braided jacket longitudinally between the elements by stitching, then shaping the sealing element, and heating the gasket assembly to an elevated temperature to disintegrate the paper core and to set its shape.

Inventors

  • 👤 Robert L Nunnally
  • 👤 Thomas L Weil

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 10:47
CPC Classifications
F; F24; F24C; F24C15/00; F24C15/02; F24C15/021; D; D04; D04B; D04B1/00; D04B1/22; D04B1/225; D04C; D04C1/00; D04C1/06; D10; D10B; D10B2505/00; D10B2505/06; Y; Y10; Y10S; Y10S277/00; Y10S277/921; Y10T; Y10T428/00; Y10T428/12; Y10T428/12333

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 18 words
A gasket according to claim 1 wherein said resilient core means includes a length of tubular knitted wire.
Claim 2
Dependent Claim 23 words
A gasket according to claim 2 including a length of longitudinally folded wire mesh disposed within the interior of said tubular knitted wire.
Claim 3
Dependent Claim 126 words
A heat-resistant gasket for use in sealing a space between closely adjacent relatively movable surfaces, comprising: a sealing element having a length of tubular knitted fabric and means forming a resilient core extending on the interior of said fabric along its length to support said fabric in a substantially tubular configuration when disposed between said surfaces; a fiberglass mounting element extending along the lEngth of said knitted fabric a spaced distance therefrom for mounting said sealing element on a selected one of said surfaces; braided fiberglass cover means surrounding said sealing and mounting elements; and means including at least one line of fiberglass stitching extending through said cover between said elements to space said elements in said cover means, whereby a flexible, heat-resistant gasket is provided.
Claim 4
Independent Claim 104 words
A method for making a flexible heat-resistant gasket comprising the steps of: knitting a fiberglass sheath around a longitudinally advancing tubular wire mesh core, braiding a fiberglass sheath around a longitudinally advancing paper core, disposing said sheathed cores in spaced parallel relation sa as they advance, braiding a common fiberglass cover around said advancing sheathed coves, joining said cover along a line extending longitudinally between said sheathed cores, applying heat to said joined assembly at a temperature sufficient to cause combustion and disintegration of said paper core, and removing said heat from said assembly, whereby a length of a flexible, heat-resistant gasket is produced.
Claim 5
Dependent Claim 28 words
A method according to claim 5 including the step of maintaining said temperature in said heat applying step in a range of substantially 800* F. to 1,100* F.
Claim 6
Dependent Claim 20 words
A method according to claim 5 including the step of knitting said wire core before knitting said fiberglass sheath therearound.
Claim 7
Dependent Claim 21 words
A method according to claim 7 including the step of longitudinally folding a wire mesh and knitting said wire core therearound.
Claim 8
Dependent Claim 21 words
A method according to claim 5 including the step of longitudinally folding said paper core before braiding said fiberglass sheath therearound.

References Cited (Backward Citations)

US2219962A Cited
US2445231A Cited
GB690906A Cited
US2924471A Cited
US2882082A Cited
US3131592A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1974-05-17 1974-11-16 1975-05-18 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1978-05-17 1978-11-16 1979-05-18 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1982-05-17 1982-11-16 1983-05-18 $7700.00 Window Closed / Lapsed

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