Patent US4062718A successfully refreshed from Google Patents.
US4062718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat sealing means
Assignee: Dow Chemical Co
•
Filing: 1976-09-02
•
Granted: 1977-12-13
•
Expires: 1996-09-02
Abstract
Abstract Efficient heat sealing, particularly of thicker and/or heat shrinkable plastic materials, is obtained using a fluid heated and cooled heat-sealing member having a body of a material of low thermal conductivity and a strip of material of high thermal conductivity communicating with a heat exchange fluid passage therein.
Inventors
- 👤 II Robert A. Hay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:19
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/26; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/812; B29C66/8126; B29C66/81261; B29C66/818; B29C66/8181; B29C66/81811; B29C66/8183; B29C66/81831; B29C66/83; B29C66/832; B29C66/8322; B29C35/00; B29C35/02; B29C35/04; B29C35/041; B29C2035/042; B29C2035/043; B29C35/16; B29C2035/1616; B29C35/049; B29C66/45
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
A heat-sealing element, the heat-sealing element comprising a body having a heat-sealing face adapted to be disposed adjacent a film or sheet to be sealed, the body having a thermal conductivity of less than about 30, the body defining a heat-exchange fluid passageway, the heat-exchange fluid passageway having an inlet and an outlet to permit flow of heat-exchange fluid through the passageway, an elongate slot communicating with the heat-exchange fluid passageway and the sealing face of the body, the slot being located in a region wherein it is intended that the sealing face should cause a seal on a workpiece, a heat-sealing member of a metal having a thermal conductivity of at least 175, the heat-sealing member being in liquid-tight sealing engagement with the body, the heat-sealing member being in said slot, the heat-sealing member having a sealing face generally commensurate with the adjacent portion of the sealing face of the body, the heat-sealing member having a fluid-contacting face generally parallel to and remote from the sealing face and in communication with the heat-exchange passage.
Claim 2
Dependent Claim
175 words
A heat-sealing element, the heat-sealing element comprising a body having a heat-sealing face adapted to be disposed adjacent a film or sheet to be sealed, the body having a thermal conductivity of less than about 30, the body defining a heat-exchange fluid passageway, the heat-exchange fluid passageway having an inlet and an outlet to permit flow of heat-exchange fluid through the passageway, an elongate slot communicating with the heat-exchange fluid passageway and the sealing face of the body, the slot being located in a region wherein it is intended that the sealing face should cause a seal on a workpiece, a heat-sealing member of a metal having a thermal conductivity of at least 175, the heat-sealing member being in liquid-tight sealing engagement with the body, the heat-sealing member being in said slot, the heat-sealing member having a sealing face generally commensurate with the adjacent portion of the sealing face of the body, the heat-sealing member having a fluid-contacting face generally parallel to and remote from the sealing face and in communication with the heat-exchange passage.
Claim 3
Dependent Claim
17 words
The heat-sealing element of claim 1 wherein the thermal conductivity of the body is less than 20.
Claim 4
Dependent Claim
13 words
The heat-sealing element of claim 1 wherein the body is of stainless steel.
Claim 5
Dependent Claim
12 words
The heat-sealing element of claim 1 wherein the heat-sealing member is silver.
Claim 6
Dependent Claim
14 words
The heat-sealing element of claim 1 having the general form of an elongate bar.
Claim 7
Dependent Claim
25 words
The heat-sealing member of claim 1 wherein the heat-sealing face has defined therein an article receiving cavity at least partially surrounded by the heat-sealing member.
Claim 8
Dependent Claim
18 words
The heat-sealing element of claim 1 in operative combination with heat-sealing apparatus and heating and cooling supply means.
Claim 9
Dependent Claim
164 words
A heat-sealing element comprising a stainless steel body having a heat-sealing face adapted to be disposed adjacent a film or sheet to be sealed, the body having a thermal conductivity of less than about 20, the body defining a heat-exchange fluid passageway, the heat-exchange fluid passageway having an inlet and an outlet to permit flow of heat-exchange fluid through the passageway, an elongate slot communicating with the heat-exchange fluid passageway and the sealing face of the body, the slot being located in a region wherein it is intended that the sealing face should cause a seal on a workpiece, a silver heat-sealing member, the heat-sealing member being in liquid-tight sealing engagement with the body, the heat-sealing member being in said slot, the heat-sealing member having a sealing face generally commensurate with the adjacent portion of the sealing face of the body, the heat-sealing member having a fluid-contacting face generally parallel to and remote from the sealing face and in communication with the heat-exchange passage.
Claim 10
Dependent Claim
164 words
A heat-sealing element comprising a stainless steel body having a heat-sealing face adapted to be disposed adjacent a film or sheet to be sealed, the body having a thermal conductivity of less than about 20, the body defining a heat-exchange fluid passageway, the heat-exchange fluid passageway having an inlet and an outlet to permit flow of heat-exchange fluid through the passageway, an elongate slot communicating with the heat-exchange fluid passageway and the sealing face of the body, the slot being located in a region wherein it is intended that the sealing face should cause a seal on a workpiece, a silver heat-sealing member, the heat-sealing member being in liquid-tight sealing engagement with the body, the heat-sealing member being in said slot, the heat-sealing member having a sealing face generally commensurate with the adjacent portion of the sealing face of the body, the heat-sealing member having a fluid-contacting face generally parallel to and remote from the sealing face and in communication with the heat-exchange passage.
References Cited (Backward Citations)
US2004041A
Cited
US2153351A
Cited
US2252779A
Cited
US2665737A
Cited
US2621704A
Cited
US2796913A
Cited
US3160999A
Cited
US3496049A
Cited
US3692613A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-12 | 1981-06-13 | 1981-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-12 | 1985-06-13 | 1985-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-12 | 1989-06-13 | 1989-12-13 | $7700.00 | Window Closed / Lapsed |