US3690091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of a package, preferably for dry and frozen material
Assignee: Christenssons Maskiner and Patenter AB
•
Filing: 1970-08-20
•
Granted: 1972-09-12
•
Expires: 1990-08-20
Abstract
Abstract A method for forming a package having a stiff tubular base portion and flexible end closures over one or both ends. The end closure piece is engaged by a suction device mounted in and movable through a welding head, and when so held it is placed onto an open end of the base portion. The welding head then moves relative to the suction device to urge the end closure piece onto the end of the package and to heat seal the same.
Inventors
- 👤 Od Wilkar Christensson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:16
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/13; B29C66/131; B29C66/1312; B29C66/20; B29C66/24; B29C66/242; B29C66/2424; B29C66/24243; B29C66/24244; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4326; B29C66/50; B29C66/51; B29C66/53; B29C66/534; B29C66/5346; B29C66/53461; B29C66/53462; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B65; B65B; B65B7/00; B65B7/16; B65B7/28; B65B7/2842; B65B7/2878; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72327; B29C66/72328; B29C66/7234; B29C66/72343
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
227 words
A method for producing a package, comprising the steps of: forming a relatively still material into a generally tubular base portion having sides forming a polygonal cross-section and open at at least one end, with closure flaps extending inwardly from the sides at said one end, placing over said one end a generally flat end closure piece which is thin and very flexible relative to the said stiff base portion by grasping said end closure piece with a suction holding tool, and then locating the end closure piece onto the said one end such that it lies on the said closure flaps and parts of the end closure piece extend outwardly beyond the sides of the base portion, and while the end closure piece is still held by the suction holding tool, attaching the end closure piece to said one end by urging it against the closure flaps and also by folding over the said parts of the end closure piece that extends outwardly beyond the sides of the base portion by moving a pressing head towards the said one end, relative to the suction tool, and attaching said parts to the outside of the tubular base portion sides adjacent said one end, all about the periphery of said one end, and then removing the suction holding tool and the pressing head from the end closure piece.
Claim 2
Independent Claim
227 words
A method for producing a package, comprising the steps of: forming a relatively still material into a generally tubular base portion having sides forming a polygonal cross-section and open at at least one end, with closure flaps extending inwardly from the sides at said one end, placing over said one end a generally flat end closure piece which is thin and very flexible relative to the said stiff base portion by grasping said end closure piece with a suction holding tool, and then locating the end closure piece onto the said one end such that it lies on the said closure flaps and parts of the end closure piece extend outwardly beyond the sides of the base portion, and while the end closure piece is still held by the suction holding tool, attaching the end closure piece to said one end by urging it against the closure flaps and also by folding over the said parts of the end closure piece that extends outwardly beyond the sides of the base portion by moving a pressing head towards the said one end, relative to the suction tool, and attaching said parts to the outside of the tubular base portion sides adjacent said one end, all about the periphery of said one end, and then removing the suction holding tool and the pressing head from the end closure piece.
Claim 3
Dependent Claim
40 words
A method according to claim 1, wherein the base portion is rectangular in cross-section, the end closure piece is a plastic film, and wherein an end closure piece is placed and attached at both ends of the tubular base portion.
Claim 4
Dependent Claim
76 words
A method according to claim 1, wherein the step of placing the generally flat closure piece includes locating the base portion, moving the suction holding tool to a position to one side of the base portion and, with its suction holding force, picking up and end closure piece from the top of a pile of end closure pieces, and moving the suction holding device to a position over the said one end of the base portion.
Claim 5
Dependent Claim
27 words
A method according to claim 1, wherein the step of attaching the end closure piece includes heat welding it to the said one end of the package.
Claim 6
Dependent Claim
108 words
A method according to claim 1, the suction holding tool being mounted in and movable longitudinally through said pressing head, said pressing head being a welding head, and wherein the step of placing the generally flat end closure piece includes moving the suction holding tool towards the said one end of the base portion, after which the said step of attaching the end closure piece is performed by moving the welding head towards the said one end, relative to the suction holding tool, such that the welding head surrounds the suction holding tool and heat seals the end closure piece onto the said one end of the package.
Claim 7
Dependent Claim
44 words
A method according to claim 5, in which the suction force is removed from the suction holding tool after the end closure piece has been welded to the package, after which the suction holding tool is moved into the interior of the welding head.
References Cited (Backward Citations)
US1384049A
Cited
US2409460A
Cited
US2723604A
Cited
US2665616A
Cited
DE1027974B
Cited
US2784892A
Cited
US2869440A
Cited
US2956484A
Cited
US3000157A
Cited
US3104599A
Cited
US3416292A
Cited
US3429237A
Cited
US3565730A
Cited
US3628301A
Cited
US3621637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |