Patent US3711231A successfully refreshed from Google Patents.
US3711231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urethane tunnel mold
Assignee: Pharmacia and Upjohn Co
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Filing: 1970-10-30
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Granted: 1973-01-16
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Expires: 1990-10-30
Abstract
Abstract The disclosure relates to apparatus for use in production of elongated elements of foamed cellular material from a liquid reaction mixture by a continuous process where the mold is comprised of a tunnel or channel having a given curvilinear cross-sectional configuration. Endless belt conveyor means encircle the channel and are in side-by-side guided relationship. The width of the belts is functionally related to the degree of curvature. Means are provided for guiding the belts lengthwise through the tunnel.
Inventors
- 👤 S Chess
- 👤 L Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:31
CPC Classifications
B; B29; B29C; B29C44/00; B29C44/20; B29C44/32; B29C44/322; B29C44/324
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
19 words
The apparatus of claim wherein adjacent edges of said belts are in close proximity to one another. claim 1
Claim 2
Dependent Claim
18 words
The apparatus of claim 1 and further including means for driving said belts at the same surface speed.
Claim 3
Independent Claim
24 words
The apparatus of claims 1 wherein one of said recesses and belts has a different width than another of said recesses and said belts.
Claim 4
Dependent Claim
17 words
The apparatus of claim 1 wherein means are provided for guiding said belts relative to said channel.
Claim 5
Dependent Claim
18 words
The apparatus of claim 5 wherein said belts have different widths and said guiding means have corresponding spacings.
Claim 6
Dependent Claim
29 words
The apparatus of claim 1 and further including means for supplying a flexible liner for said channel, and means for depositing a liquid reaction mixture on said flexible liner.
Claim 7
Dependent Claim
14 words
The apparatus of claim 7 wherein said channel is open at its upper end.
Claim 8
Dependent Claim
93 words
Apparatus for use in the production of elongated elements of foamed cellular material from a liquid reaction mixture comprising: means defining an elongated molding channel having flat and curvilinear configurations in cross section, conveyor means comprised of a plurality of endless belts enclosing said channel and extending lengthwise of said channel in side-by-side relationship, said belts having a rectangular cross-section and lying on said flat and curvilinear configurations, said belts on said curvilinear having widths functionally related to the degree of said curvature, and means on said curvilinear configuration for guiding said belts.
Claim 9
Dependent Claim
74 words
Apparatus for use in the production of elongated elements of foamed cellular material from a liquid reaction mixture, said apparatus comprising: means defining an elongated molding channel including a given curvilinear cross-sectional configuration, conveyor means comprised of a plurality of endless belts encircling said channel and extending lengthwise of said channel in side-by-side relationship, recesses in said channel means for receiving said belts, and means for driving said belts at a common surface speed.
Claim 10
Dependent Claim
75 words
Apparatus for use in the production of elongated elements of foamed cellular material from a liquid reaction mixture, said apparatus comprisiNg: means defining an elongated molding channel including a given curvilinear cross-sectional configuration, conveyor means comprised of a plurality of endless belts encircling said channel and extending lengthwise of said channel in a side-by-side relationship, and means for selectively adjusting the cross-sectional position of said belts and said molding channel for altering said cross-sectional configuration.
Claim 11
Dependent Claim
16 words
The apparatus of claim 11 wherein said channel includes lengthwise extending recesses for guiding said belts.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |