US3783582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shrink-film capping machine
Assignee: Individual
•
Filing: 1972-11-30
•
Granted: 1974-01-08
•
Expires: 1992-11-30
Abstract
Abstract An automatic shrink-film capping machine for forming and applying caps of shrink-film to the open mouths of containers. This device comprises means to advance, cut and position a sheet of shrink-film over the top of a container. A positioned sheet is engaged by a capper head which is lowered relative to the sheet and container whereby heating elements, disposed therein are moved radially inwardly and contact the shrink-film and container to form a heat shrunk cap thereover.
Inventors
- 👤 E Willvonseder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:20
CPC Classifications
B; B65; B65B; B65B7/00; B65B7/16; B65B7/28; B65B7/2842; B65B7/2885
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
146 words
An automatic shrink-film capping machine for forming caps of shrink-film over the open end of a container comprising in combination, a frame adapted to receive a container therein, capper head means in said frame axially aligned with said container, said capper head means being vertically movable from an elevated non-operative position to a lowered operative position, means to position a sheet of plastic shrink-film over said container, and means to lower said capper head means relative to said sheet and container, means to fold said sheet over the top and sides of said container, a plurality of radially disposed heater elements within said capper head means, and means to move said heater elements radially inwardly when said capper head means is in said lowered, operative position, whereby said heater elements contact the film and the sides of said container to form a heat shrunk cap thereover.
Claim 2
Dependent Claim
146 words
An automatic shrink-film capping machine for forming caps of shrink-film over the open end of a container comprising in combination, a frame adapted to receive a container therein, capper head means in said frame axially aligned with said container, said capper head means being vertically movable from an elevated non-operative position to a lowered operative position, means to position a sheet of plastic shrink-film over said container, and means to lower said capper head means relative to said sheet and container, means to fold said sheet over the top and sides of said container, a plurality of radially disposed heater elements within said capper head means, and means to move said heater elements radially inwardly when said capper head means is in said lowered, operative position, whereby said heater elements contact the film and the sides of said container to form a heat shrunk cap thereover.
Claim 3
Dependent Claim
25 words
A capping machine, as defined in claim 1, wherein said heater elements are contoured to conform to the sidewalls of the container to be capped.
Claim 4
Dependent Claim
14 words
A capping machine, as defined in claim 2, wherein four heater elements are included.
Claim 5
Dependent Claim
33 words
A capping machine, as defined in claim 1, wherein there is a switch means in said frame to sense the presence of a container arranged therein and actuate said capper head lowering means.
Claim 6
Dependent Claim
36 words
A capping machine, as defined in claim 1, wherein there is a folding collar on the bottom of said capper head means to fold said sheet of shrink-film over the top and sides of said container.
Claim 7
Dependent Claim
29 words
A capping machine, as defined in claim 1, wherein there is a heat conducting cover on the top of said capper head means to form a heated chamber therein.
Claim 8
Dependent Claim
31 words
A capping machine, as defined in claim 6, wherein there is a gap maintained between said cover and said folded shrink-film when said capper head is in the lowered, operative position.
Claim 9
Dependent Claim
66 words
A capping machine, as defined in claim 1, wherein said means to move said heater elements comprises a ring rotatably attached to said capper head having upstanding pins thereon communicating with slots in said heater elements, radial guideways for said heating elements, whereby rotational movement of said ring is translated by said pins moving in said slots, into straight line radial movement of said heater elements.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |