Patent US3839128A successfully refreshed from Google Patents.
US3839128A
Expired / Lapsed
US
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Apparatus for manufacturing thermoplastic containers having thermoplastic closures
Assignee: Modern Package Co Ltd
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Filing: 1972-01-17
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Granted: 1974-10-01
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Expires: 1992-01-17
Abstract
Abstract An apparatus for manufacturing containers from thermoplastic film with each container having at its mouth a thermoplastic closure in the form of a sliderless fastener. This latter fastener takes the form of a pair of thermoplastic strips having a tongue-and-groove connection therebetween. With this fastener in its closed condition film edge portions which subsequently form the mouth of the container are heat-sealed to the strips at outer surfaces thereof. The apparatus includes coplanar heatresistant plates having parallel edges which define between themselves a gap for receiving projections of the strips which form the tongue-and-groove connection therebetween, and the heat sealing takes place by pressing the film edge portions against the strips of the closure while these strips have these heatresistant plates situated therebetween. The film which forms the container initially is in the form of a tube, and a cutter cuts the tube longitudinally to provide the edges which subsequently form the mouth of the container.
Inventors
- 👤 S Arai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:34
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/25; B65D33/2508; B29; B29C; B29C65/00; B29C65/02; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/43121; B29C66/47; B29C66/474; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; A; A44; A44B; A44B19/00; A44B19/10; A44B19/16; B29C66/13; B29C66/135; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/813; B31B70/8131; B31B70/8132; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1322
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
244 words
In an apparatus for manufacturing a container from thermoplastic film with the container having at its mouth a thermoplastic closure formed by a sliderless fastener having a pair of strips provided with inner faces directed toward each other and carrying projecting tongue-and-groove portions extending longitudinally along said inner faces and when secured together to close the fastener situating said inner faces at a given distance from each other, a pair of elongated heatresistant guide plates having a thickness approximately equal to said given distance, located in a common plane, and respectively having directed toward but spaced from each other a pair of edges which are parallel to each other and define an elongated gap for longitudinally receiving the projecting portions at the inner faces of the strips while the inner faces of the strips extend laterally beyond said gap and engage outer faces of said plates, and heat-sealing means directed toward the outer faces of at least one of said plates for heat-sealing to said strips at surfaces thereof directed away from said plates edge portions of a plastic film which subsequently form the mouth of the container, so that the tongue-and-groove projections can engage each other for holding the fastener strips in the closed condition of the fastener during joining of the film to the strips while the strips are pressed at their inner faces against the outer surfaces of said one plate during heat-sealing without influencing the engagement between the tongue-and-groove projections.
Claim 2
Dependent Claim
244 words
In an apparatus for manufacturing a container from thermoplastic film with the container having at its mouth a thermoplastic closure formed by a sliderless fastener having a pair of strips provided with inner faces directed toward each other and carrying projecting tongue-and-groove portions extending longitudinally along said inner faces and when secured together to close the fastener situating said inner faces at a given distance from each other, a pair of elongated heatresistant guide plates having a thickness approximately equal to said given distance, located in a common plane, and respectively having directed toward but spaced from each other a pair of edges which are parallel to each other and define an elongated gap for longitudinally receiving the projecting portions at the inner faces of the strips while the inner faces of the strips extend laterally beyond said gap and engage outer faces of said plates, and heat-sealing means directed toward the outer faces of at least one of said plates for heat-sealing to said strips at surfaces thereof directed away from said plates edge portions of a plastic film which subsequently form the mouth of the container, so that the tongue-and-groove projections can engage each other for holding the fastener strips in the closed condition of the fastener during joining of the film to the strips while the strips are pressed at their inner faces against the outer surfaces of said one plate during heat-sealing without influencing the engagement between the tongue-and-groove projections.
Claim 3
Dependent Claim
106 words
The combination of claim 1 and wherein a holding means is operatively connected with said plates at the region of one of their ends for holding the plates together with said edges parallel to each other for defining said gap, said holding means including a pair of holding members between which said plates are located with each member fixed to said plates at the outer surfaces thereof and bridged away from said outer surfaces at the region of said gap sufficiently to provide between said members and the outer surfaces of said plates spaces sufficiently great to provide for free longitudinal movement of the strips therethrough.
Claim 4
Dependent Claim
67 words
The combination of claim 2 and wherein a second holding means is fixed to said plates at ends thereof distant from the first-mentioned holding means with said second holding means extending along said plates next to the outer surfaces thereof, so that the strips are separated from each other to extend around the second holding means, the sealing means being situated between the pair of holding means.
Claim 5
Dependent Claim
100 words
The combination of claim 1 and wherein a cutting means is situated adjacent and in advance of the plates for cutting a sheet of film to provide the film edge portions which are joined to the strips, said cutting means having in the region of the common plane of said plates a cutting edge for cutting the film and beyond the cutting edge between the latter and the plates a pair of wall portions respectively situated on opposite sides of said plane and defining between themselves a space through which the strips are guided to the gap between said plates.
Claim 6
Dependent Claim
96 words
The combination of claim 4 and wherein a folding member is situated in the region of said plane in advance of said cutting means as the film travels toward the latter for folding the film inwardly to provide a pair of inner film layers between outer layers of the film with the inner layers joined to each other at an inner edge where the cutting means cuts the film and joined to the outer layers at outer edges of the inner layers, respectively, so that the heat-sealing means will seal to the strips film of double-thickness.
Claim 7
Dependent Claim
30 words
The combination of claim 5 and wherein said folding member is in the form of a disc situated in the same plane as said plates and supported for rotary movement.
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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) | 1977-09-30 | 1978-04-01 | 1978-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-30 | 1982-04-01 | 1982-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-30 | 1986-04-01 | 1986-10-01 | $7700.00 | Window Closed / Lapsed |