Patent US4051643A successfully refreshed from Google Patents.
US4051643A
Expired / Lapsed
US
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Method of packing articles with heat shrinkable films
Assignee: Showa Paxxs Corp
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Filing: 1976-10-12
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Granted: 1977-10-04
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Expires: 1996-10-12
Abstract
Abstract An article is packed with a heat shrinkable film having a width larger than that of the article. The film is moved in contact with a heating member and then immediately wrapped under tension about the article with the opposite side edges of the film protruded beyond the opposite ends of the article. At the same time, the film shrinks about the article to tightly pack it not only on the peripheral surface but also on the end surfaces of the article.
Inventors
- 👤 Akio Saito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:01
CPC Classifications
B; B65; B65B; B65B53/00; B65B53/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
A method of packing an article with a heat shrinkable film comprising the steps of moving the heat shrinkable film, contacting the film against a heating member heated to a predetermined temperature sufficient to cause the film to shrink, and then immediately wrapping under a predetermined tension the heated film about an article to be packed having a width smaller than that of the heat shrinkable film with the side edges of the film protruded beyond the opposite ends of said article, and causing said film to shrink, thus tightly packing the article not only on the peripheral surface but also on the end surface of the article by the heat shrunk film.
Claim 2
Independent Claim
113 words
A method of packing an article with a heat shrinkable film comprising the steps of moving the heat shrinkable film, contacting the film against a heating member heated to a predetermined temperature sufficient to cause the film to shrink, and then immediately wrapping under a predetermined tension the heated film about an article to be packed having a width smaller than that of the heat shrinkable film with the side edges of the film protruded beyond the opposite ends of said article, and causing said film to shrink, thus tightly packing the article not only on the peripheral surface but also on the end surface of the article by the heat shrunk film.
Claim 3
Dependent Claim
21 words
The method according to claim 1 where said heat shrinkable film is caused to periodically engage and disengage said heating member.
Claim 4
Independent Claim
152 words
A method of packing an article with heat shrinkable films, each having a width larger than that of said article, comprising the steps of continuously moving said article, continuously advancing a pair of heat shrinkable films toward said article from the opposite sides thereof, contacting the films against a pair of heating rollers movable toward and away from each other and heated to a predetermined temperature sufficient to cause said films to shrink, moving said heating rollers firstly away from each other and then toward each other while said article is moving continuously thereby covering the periphery and the end surfaces of said article by the heated films with the side edges thereof protruded beyond the opposite sides of the article and fusing together said pair of heat shrinkable films by said heating rollers while simultaneously causing the films to shrink about said article, and severing said films at the fused portion.
Claim 5
Independent Claim
152 words
A method of packing an article with heat shrinkable films, each having a width larger than that of said article, comprising the steps of continuously moving said article, continuously advancing a pair of heat shrinkable films toward said article from the opposite sides thereof, contacting the films against a pair of heating rollers movable toward and away from each other and heated to a predetermined temperature sufficient to cause said films to shrink, moving said heating rollers firstly away from each other and then toward each other while said article is moving continuously thereby covering the periphery and the end surfaces of said article by the heated films with the side edges thereof protruded beyond the opposite sides of the article and fusing together said pair of heat shrinkable films by said heating rollers while simultaneously causing the films to shrink about said article, and severing said films at the fused portion.
Claim 6
Dependent Claim
44 words
The method according to claim 3 wherein said article has a square cross-sectional configuration, said article is moved in the direction of a pair of diagonal apices thereof and said pair of heat shrinkable films are fused together and severed at said diagonal apices.
Claim 7
Dependent Claim
48 words
The method according to claim 3 wherein said article has an elongated rectangular cross-sectional configuration with round ends, said article is moved in the direction along the longer sides of said article, and said pair of heat shrinkable films are fused together and severed at said round ends.
References Cited (Backward Citations)
US2597041A
Cited
US3590549A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |