Patent US1845503A successfully refreshed from Google Patents.
Patent US3834853A successfully refreshed from Google Patents.
US3834853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for making sheets
Assignee: Solvay SA
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Filing: 1972-04-25
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Granted: 1974-09-10
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Expires: 1992-04-25
Abstract
Abstract Device for continuous longitudinal corrugation of sheets of thermoplastic material including two sets of interdigitated endless bands which follow a rectilinear path in the zone where the sheets are cooled, the bands being guided at least over the portions thereof which contact the sheets by supports which act on that face of the band which is not in contact with the sheets.
Inventors
- 👤 J Bequet
- 👤 P Dubois
- 👤 Asbroeck R Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:33
CPC Classifications
B; B29; B29C; B29C53/00; B29C53/22; B29C53/24; B29C53/26; B29C53/265
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
193 words
A device for longitudinally corrugating a sheet of thermoplastic material in the plastic state by providing in the sheet a plurality of corrugations disposed side-by-side and each extending parallel to the length dimension of the sheet, comprising two series of movable continuous bands spaced apart and progressively imbricated in one another; a cooling zone through which at least a part of said bands move; said bands moving together with the sheet to be corrugated and arranged to follow a rectilinear path in said zone in which the shaped sheet is cooled; each band having a surface for contacting face-to-face and deforming the sheet to make one corrugation therein, said band surface being substantially identical in dimension and configuration to the desired dimension and configuration of a major part of one corrugation of the sheet; said bands being made of a material having a thermal conductivity lower than 10 2 Cal/cm.sec.*C; and means for supporting and guiding said bands, at least over their portion which is in contact with the sheet to be corrugated, said means acting on the faces of the bands which are not in contact with the sheet to be corrugated.
Claim 2
Independent Claim
193 words
A device for longitudinally corrugating a sheet of thermoplastic material in the plastic state by providing in the sheet a plurality of corrugations disposed side-by-side and each extending parallel to the length dimension of the sheet, comprising two series of movable continuous bands spaced apart and progressively imbricated in one another; a cooling zone through which at least a part of said bands move; said bands moving together with the sheet to be corrugated and arranged to follow a rectilinear path in said zone in which the shaped sheet is cooled; each band having a surface for contacting face-to-face and deforming the sheet to make one corrugation therein, said band surface being substantially identical in dimension and configuration to the desired dimension and configuration of a major part of one corrugation of the sheet; said bands being made of a material having a thermal conductivity lower than 10 2 Cal/cm.sec.*C; and means for supporting and guiding said bands, at least over their portion which is in contact with the sheet to be corrugated, said means acting on the faces of the bands which are not in contact with the sheet to be corrugated.
Claim 3
Dependent Claim
17 words
A device as defined in claim 1, wherein said thermal conductivity is lower than 10 3 cal/cm.sec.*C.
Claim 4
Dependent Claim
31 words
A device as defined in claim 1 wherein the continuous bands of each series are narrow and are made of a material having a hardness higher than 35 Shore A units.
Claim 5
Dependent Claim
23 words
A device as defined in claim 3 wherein said bands are of a material having a hardness higher than 45 Shore A units.
Claim 6
Dependent Claim
23 words
A device as defined in claim 1 wherein the bands are made of a material having an elastic elongation greater than 0.3 percent.
Claim 7
Dependent Claim
33 words
A device as defined in claim 1 wherein the bands are made from a material which at the corrugating temperature exhibits abrasive wear, according to the standard DIN 53516, lower than 600 mm3.
Claim 8
Dependent Claim
20 words
A device as defined in claim 6 wherein the material exhibits wear lower than 300 mm3 according to said standard.
Claim 9
Dependent Claim
24 words
A device as defined in claim 1 wherein said means includes shells which move at the same speed as the sheets to be corrugated.
Claim 10
Dependent Claim
13 words
A device as defined in claim 1 wherein said means includes fixed guides.
Claim 11
Dependent Claim
33 words
A device as defined in claim 1 wherein the material of which the bands are made is selected from the group consisting of woods, natural or synthetic rubbers, polyamides, polyaldehydes, polyolefins and polycarbonates.
Claim 12
Dependent Claim
13 words
A device as defined in claim 1 wherein the bands have textile reinforcement.
References Cited (Backward Citations)
US2163063A
Cited
FR1223048A
Cited
FR1335521A
Cited
US3516116A
Cited
US3570066A
Cited
US3744952A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |