US3780488A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Closure for film packages and method of making same
Assignee: DowBrands Inc
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Filing: 1972-02-03
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Granted: 1973-12-25
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Expires: 1992-02-03
Abstract
Abstract A method of forming improved film packages of a type wherein one or more of the package ends or regions is gathered and tied closed by encircling metal bands, closure clips or other closure devices. The resultant closure of compressed film is made leakproof by application of ultrasonic vibratory energy to the package in the vicinity of the gathered region of film. The invention in its modified embodiments further invisions elimination of present bands, closure clips or other closure devices by using instead a temporary film gathering and holding means, and then applying ultrasonic energy to the gathered region of film to form a permanent closure not requiring a band or clip.
Inventors
- 👤 A Herrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:11
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/10; B65B51/22; B65B51/225; B65D; B65D77/00; B65D77/10; Y; Y10; Y10S; Y10S206/00; Y10S206/811
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
97 words
A method of manufacturing a package comprising the steps of: a. locating a product within a tubular film envelope, the film being of a type which is sensitive to shrinkage and accompanying swelling via application of ultrasonic vibratory energy thereto; b. gathering the film to form a package end, and applying an encircling metal clip in compression about the gathered film; c. applying ultrasonic energy to the package in the general vicinity of said clip, to swell the film underneath the clip into intimate conformity therewith, and to form a substantially hermetically tight closure of said end.
Claim 2
Independent Claim
97 words
A method of manufacturing a package comprising the steps of: a. locating a product within a tubular film envelope, the film being of a type which is sensitive to shrinkage and accompanying swelling via application of ultrasonic vibratory energy thereto; b. gathering the film to form a package end, and applying an encircling metal clip in compression about the gathered film; c. applying ultrasonic energy to the package in the general vicinity of said clip, to swell the film underneath the clip into intimate conformity therewith, and to form a substantially hermetically tight closure of said end.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein said energy is transmitted to the film through the clip.
Claim 4
Dependent Claim
65 words
The method of claim 1 wherein successive packages are formed and are connected each to the other by a gathered region, and wherein step C comprises applying ultrasonic vibratory energy to the gathered region to cut the packages apart from each other, said energy being applied at an area remote from and between a pair of spaced apart clips associated with each said gathered region.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |