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US3654829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for punching holes in heat shrinkable web material
Assignee: Scandia Packaging Machinery Co
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Filing: 1969-07-29
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Granted: 1972-04-11
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Expires: 1989-07-29
Abstract
Abstract A method and apparatus for punching holes in a web of material used in wrapping packages is provided. The web of material has a composition that will change shape when subjected to heat. Heated punches are used to form holes in the web of material and the heat from the punch affects the material along the periphery of the hole to form a thickened ridge therearound. The ribbed edges are reinforcements which prevent tearing of the material used in the wrapping process. The apparatus includes feed means for the web of material to move between a base support and at least one punch member. A more specific feature of the invention includes the use of a vacuum forming means to remove punchings from the apparatus when they are obtained from the web of material. Wrapping material that is adaptable to the method and apparatus of this invention includes compositions such as polypropylene.
Inventors
- 👤 Andrew W Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:00
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/08; B26D7/10; B26F; B26F1/00; B26F1/02; Y; Y10; Y10T; Y10T83/00; Y10T83/202; Y10T83/283; Y10T83/293; Y10T83/929; Y10T83/9314
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
An apparatus for punching holes in a web of heat shrinkable material used in wrapping packages comprising: a. a punching mechanism including a base support means and at least one punch member mounted in cooperative relationship with the base support means, b. said base support means including a flexible base portion contiguous to a rigid base portion, c. said flexible base portion including openings that are registered with openings located in the rigid base portion, d. said flexible base openings being smaller than said rigid base openings so that the flexible base portion overhangs the edge of the rigid base openings, e. said punch member having a closed configuration with a cutting edge which acts against said flexible base portion to completely remove a punching from the web, f. said punching mechanism includes means for heating the punch member to effect formation of a rib structure along the periphery of the hole cut by the punch member, g. means for feeding the web of heat shrinkable material between the base support means and the punch member, and h. means for bringing the punch member against the flexible base portion to form a rib reinforced hole in the web.
Claim 2
Independent Claim
198 words
An apparatus for punching holes in a web of heat shrinkable material used in wrapping packages comprising: a. a punching mechanism including a base support means and at least one punch member mounted in cooperative relationship with the base support means, b. said base support means including a flexible base portion contiguous to a rigid base portion, c. said flexible base portion including openings that are registered with openings located in the rigid base portion, d. said flexible base openings being smaller than said rigid base openings so that the flexible base portion overhangs the edge of the rigid base openings, e. said punch member having a closed configuration with a cutting edge which acts against said flexible base portion to completely remove a punching from the web, f. said punching mechanism includes means for heating the punch member to effect formation of a rib structure along the periphery of the hole cut by the punch member, g. means for feeding the web of heat shrinkable material between the base support means and the punch member, and h. means for bringing the punch member against the flexible base portion to form a rib reinforced hole in the web.
Claim 3
Dependent Claim
24 words
An apparatus as defined in claim 1 wherein there is a plurality of punch members disposed in an ordered arrangement adjacent the base support.
Claim 4
Dependent Claim
24 words
An apparatus as defined in claim 1 wherein said punch member includes a hollow passage extending through a punch post and a punch base.
Claim 5
Dependent Claim
18 words
An apparatus as defined in claim 3 wherein said punch member and said heating means are integrally constructed.
Claim 6
Dependent Claim
19 words
An apparatus as defined in claim 1 wherein the web feeding means is reciprocatable across the base support means.
Claim 7
Dependent Claim
30 words
An apparatus as defined in claim 1 including a means to form a vacuum disposed adjacent the base support to remove the punchings which have been cut from the web.
Claim 8
Dependent Claim
29 words
An apparatus as defined in claim 6 wherein said vacuum forming means includes a vacuum chamber disposed on the side of the base support opposite from the punch member.
Claim 9
Dependent Claim
30 words
An apparatus as defined in claim 6 wherein the punch member is disposed above the base support means and the vacuum forming means is disposed below the base support means.
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) | 1975-04-11 | 1975-10-11 | 1976-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-11 | 1979-10-11 | 1980-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-11 | 1983-10-11 | 1984-04-11 | $7700.00 | Window Closed / Lapsed |