US4140046A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piercing blade temperature control
Assignee: Union Carbide Corp
•
Filing: 1977-06-13
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Granted: 1979-02-20
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Expires: 1997-06-13
Abstract
Abstract A sheet piercing blade used to form perforate separation lines across continuous strip partible flattened tubular plastic film packaging bags is maintained a preselected optimum operating temperature by a heat transfer fluid medium circulating through a duct in substantially contiguous contact with the blade, a heat exchanger, and conduits connecting the duct and the heat exchanger.
Inventors
- 👤 Walter V. Marbach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:34
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/74; B29C65/743; B29C65/7437; B26; B26F; B26F3/00; B26F3/06; B29C65/02; B29C65/18; B29C65/24; B29C65/26; B29C65/7441; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/20; B29C66/21; B29C66/23; B29C66/232; B29C66/24; B29C66/244; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43129; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81411; B29C66/81421; B29C66/81422; B29C66/818; B29C66/8181; B29C66/8182; B29C66/81821; B29C66/90; B29C66/91; B29C66/914; B29C66/9141; B29C66/91421; B29C66/91431; B31; B31B; B31B70/00; B31B70/14; B29C35/00; B29C35/02; B29C35/04; B29C35/041; B29C2035/042; B29C2035/043; B29C66/70; B29C66/71; B29C66/81415; B29C66/81417; B29C66/83; B29C66/832; B31B70/60; B31B70/64; B31B70/642; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313; Y10T83/00; Y10T83/283; Y10T83/293
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
In an apparatus for forming continuous strip separable packaging bags with a heat seal bar to form bag bottom seals, a heated bag material piercing blade, and a heat source to provide heat for said blade, the improvement of blade temperature lowering and stabilization apparatus comprising, in combination, a fluid-tight duct mounted in heat transfer relationship contiguously with said blade, heat exchanger means independent and separate of the heat source which provides heat for said blade adapted to conduct heat from said blade and said duct, conduit means operably connecting said duct and said heat exchanger means, a fluid heat transfer medium in the duct and the heat exchanger means, and pump means arranged and disposed to continuously circulate said fluid heat transfer medium through the duct, the conduit means, and the heat exchanger means, whereby the piercing blade is maintained substantially at a preselected bag material annealing temperature.
Claim 2
Dependent Claim
149 words
In an apparatus for forming continuous strip separable packaging bags with a heat seal bar to form bag bottom seals, a heated bag material piercing blade, and a heat source to provide heat for said blade, the improvement of blade temperature lowering and stabilization apparatus comprising, in combination, a fluid-tight duct mounted in heat transfer relationship contiguously with said blade, heat exchanger means independent and separate of the heat source which provides heat for said blade adapted to conduct heat from said blade and said duct, conduit means operably connecting said duct and said heat exchanger means, a fluid heat transfer medium in the duct and the heat exchanger means, and pump means arranged and disposed to continuously circulate said fluid heat transfer medium through the duct, the conduit means, and the heat exchanger means, whereby the piercing blade is maintained substantially at a preselected bag material annealing temperature.
References Cited (Backward Citations)
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US2808690A
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US2997905A
Cited
US3397505A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |