US3357153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for heat shrinking film
Assignee: WR Grace and Co
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Filing: 1965-07-23
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Granted: 1967-12-12
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Expires: 1985-07-23
Abstract
No abstract record available.
Inventors
- 👤 James S Shaffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:10
CPC Classifications
B; B65; B65B; B65B53/00; B65B53/02; B65B53/06; B65B53/063
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
APPARATUS FOR HEAT SHRINKING THERMOPLASTIC FILM COMPRISING: (A) AN INVERTED U-SHAPED HOUSING HAVING VERTICAL SIDE WALLS AND A HORIZONTAL TOP WALL FORMING AN OPENENDED CHAMBER, (B) AN APERTURE IN THE CENTRAL PORTION OF SAID TOP WALL, (C) A MULTIPLICITY OF SMALL APERTURES IN THE LOWER PORTION OF EACH OF SAID SIDE WALLS, SAID MULTIPLICITY OF APERTURES CONSTITUTING THE MAJORITY OF THE EXIT AREA THROUGH THE WALLS OF SAID INVERTED U-SHAPED HOUSING, (D) A CASING SPACED APART FROM SAID HOUSING EXTERIORLY OF SAID CHAMBER FORMING AN ANNULUS WITH SAID HOUSING FOR THE PASSAGE OF AIR THERETHROUGH, (E) MEANS FOR HEATING AIR WITHIN SAID ANNULUS, AND (F) MEANS FOR CONVEYING PRODUCT THROUGH SAID CHAMBER,
Claim 2
Dependent Claim
112 words
APPARATUS FOR HEAT SHRINKING THERMOPLASTIC FILM COMPRISING: (A) AN INVERTED U-SHAPED HOUSING HAVING VERTICAL SIDE WALLS AND A HORIZONTAL TOP WALL FORMING AN OPENENDED CHAMBER, (B) AN APERTURE IN THE CENTRAL PORTION OF SAID TOP WALL, (C) A MULTIPLICITY OF SMALL APERTURES IN THE LOWER PORTION OF EACH OF SAID SIDE WALLS, SAID MULTIPLICITY OF APERTURES CONSTITUTING THE MAJORITY OF THE EXIT AREA THROUGH THE WALLS OF SAID INVERTED U-SHAPED HOUSING, (D) A CASING SPACED APART FROM SAID HOUSING EXTERIORLY OF SAID CHAMBER FORMING AN ANNULUS WITH SAID HOUSING FOR THE PASSAGE OF AIR THERETHROUGH, (E) MEANS FOR HEATING AIR WITHIN SAID ANNULUS, AND (F) MEANS FOR CONVEYING PRODUCT THROUGH SAID CHAMBER,
References Cited (Backward Citations)
US2906627A
Cited
US3312811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |