US3851440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packaging method
Assignee: FMC Corp
•
Filing: 1972-11-13
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Granted: 1974-12-03
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Expires: 1992-11-13
Abstract
Abstract A packaging method in which an article is contained within a flexible bag which is twisted at a location between its open end and the article to provide an envelope encasing the article, after which the portion of such bag extending between the twisted section and the open end thereof is urged as an envelope onto the encased article. Preferably, the bag is formed of a stretched or stretchable, thermoplastic web, with at least an annular section of the overlying envelope being at least partially relaxed from a stretched condition, so as to snugly grip the article encasing envelope.
Inventors
- 👤 E Horsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:50
CPC Classifications
B; B65; B65B; B65B51/00; B65B11/00; B65B11/54
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
103 words
An article packaging method including the steps of containing an article which is to be packaged within a flexible bag, twisting the bag on itself at a location between its open end and the contained article to provide an envelope encasing the article, stretching at least an annular section of the portion of the bag extending between the twisted section and the open end thereof, urging such portion of the bag onto the encased article as an overlying envelope, and at least partially relaxing the stretched section of the overlying envelope to cause the same to engage snugly with the article encasing envelope.
Claim 2
Dependent Claim
103 words
An article packaging method including the steps of containing an article which is to be packaged within a flexible bag, twisting the bag on itself at a location between its open end and the contained article to provide an envelope encasing the article, stretching at least an annular section of the portion of the bag extending between the twisted section and the open end thereof, urging such portion of the bag onto the encased article as an overlying envelope, and at least partially relaxing the stretched section of the overlying envelope to cause the same to engage snugly with the article encasing envelope.
Claim 3
Dependent Claim
29 words
A method as defined in claim 1 wherein heat is applied to at least the stretched section of the overlying envelope to relax the same from its stretched condition.
Claim 4
Dependent Claim
50 words
A method as defined in claim 1 wherein the bag is preformed from a stretchable material and has transverse dimensions which are slightly less than those of the article which is being packaged whereby such bag is stretched transversely during insertion therein of the article which is to be packaged.
Claim 5
Dependent Claim
55 words
A method as defined in claim 1 wherein the bag is preformed of a stretchable material and wherein at least the annular section of that portion of the bag extending between its twisted section and the open end thereof is stretched concomitantly as such portion is urged onto the encased article as an overlying envelope.
Claim 6
Dependent Claim
50 words
A method as defined in claim 1 wherein the annular section of that portion of the bag extending between the twisted section and the open end thereof is stretched after such bag is twisted upon itself and before such portion is urged as an envelope onto the article encasing envelope.
Claim 7
Dependent Claim
31 words
A method as defined in claim 1 wherein the article which is to be packaged is contained by stretching a web of flexible, stretchable material as a bag about such article.
Claim 8
Dependent Claim
77 words
A method as defined in claim 1 wherein the portion of the bag extending between the twisted section and the open end thereof is of a length substantially greater than the encased article and further including the steps of twisting such portion at a location adjacent to the end of the encased article remote from the first location of bag twisting, and urging the remainder of such portion onto the packaged article as a second overlying envelope.
References Cited (Backward Citations)
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US2622380A
Cited
US2783599A
Cited
US2884328A
Cited
US3245198A
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US3381444A
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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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |