Patent US4317697A successfully refreshed from Google Patents.
US4317697A
Expired / Lapsed
US
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Sealing mechanism
Assignee: Reynolds Metals Co
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Filing: 1980-09-29
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Granted: 1982-03-02
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Expires: 2000-09-29
Abstract
Abstract An adjustable sealing mechanism for heat sealing packages in plastic film is disclosed. The sealing apparatus includes means for vertically adjusting the position of the heat seal to accommodate objects of varying heights while maintaining a vertically controlled heat seal at the ends of the object.
Inventors
- 👤 John R. McLean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:51
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/26; B65B51/30; B65B51/303; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
116 words
A heat sealing apparatus comprising an upper sealing member, a lower sealing member, an air cylinder for moving said lower sealing member in an upward direction, linkage means connected to said air cylinder for moving said upper sealing member in a downward direction, a pivotable bar for controlling the relative amounts of vertical movements of said upper sealing member and said lower sealing member and means for spacing said upper sealing member from said lower sealing member prior to movements thereof, said means for spacing comprising a mounting bracket connected to said upper sealing member, an adjustable collar connected to said pivotable bar and a connecting rod mounted between said mounting bracket and said adjustable collar.
Claim 2
Dependent Claim
116 words
A heat sealing apparatus comprising an upper sealing member, a lower sealing member, an air cylinder for moving said lower sealing member in an upward direction, linkage means connected to said air cylinder for moving said upper sealing member in a downward direction, a pivotable bar for controlling the relative amounts of vertical movements of said upper sealing member and said lower sealing member and means for spacing said upper sealing member from said lower sealing member prior to movements thereof, said means for spacing comprising a mounting bracket connected to said upper sealing member, an adjustable collar connected to said pivotable bar and a connecting rod mounted between said mounting bracket and said adjustable collar.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein said pivotable bar is pin mounted to said air cylinder, said collar and to a frame upon which said apparatus is mounted.
Claim 4
Dependent Claim
30 words
The apparatus of claim 2 wherein said frame includes a track member and said mounting bracket includes a follower to prevent rotation of said upper sealing member during movement thereof.
Claim 5
Dependent Claim
32 words
The apparatus of claim 3 wherein said mounting bracket includes a track member and said lower sealing member includes a follower to prevent rotation of said lower sealing member during movement thereof.
Claim 6
Dependent Claim
16 words
The apparatus of claim 1 wherein said air cylinder is controlled by a spring-loaded shuttle valve.
References Cited (Backward Citations)
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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) | 1985-03-01 | 1985-08-31 | 1986-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-01 | 1989-08-31 | 1990-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-01 | 1993-08-31 | 1994-03-02 | $7700.00 | Window Closed / Lapsed |