US4946536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making a fusion bonded cartridge
Assignee: ROBERTS POLYPRO Inc FKA ROBERTS SYSTEMS Inc
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Filing: 1988-12-12
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Granted: 1990-08-07
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Expires: 2008-12-12
Abstract
Abstract A dispensing cartridge comprising a plurality of stacked individual articles formed of rigid or semi-rigid thermoplastic material, each article being fusion bonded at its periphery to adjacent articles in the stacked relationship. The cartridges are formed by passing a stack of the articles through a heating zone to fusion bond the articles one to the other without producing any visual discontinuity about the periphery of the cartridge.
Inventors
- 👤 John T. Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:19
CPC Classifications
B; B65; B65D; B65D69/00; B29; B29C; B29C65/00; B29C65/76; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/435; B29C66/80; B29C66/83; B29C66/836; B29C65/02; B29C65/08; B29C65/18; B29C66/01; B29C66/05; B29C66/10; B29C66/13; B29C66/137; B29L; B29L2007/00; B29L2007/004
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
A process for forming a dispensing cartridge comprising the steps of: stacking a plurality of individual articles formed of rigid or semi-rigid thermoplastic articles one upon the other to form a stack; and passing said stack through a heating zone to fusion bond the articles to one another about the periphery of each article; said step of passing to form a fusion bond being carried out to form said bond without the formation of visual discontinuities and to permit non destructive removal of each of said individual articles from an end of said stack by shearing.
Claim 2
Dependent Claim
96 words
A process for forming a dispensing cartridge comprising the steps of: stacking a plurality of individual articles formed of rigid or semi-rigid thermoplastic articles one upon the other to form a stack; and passing said stack through a heating zone to fusion bond the articles to one another about the periphery of each article; said step of passing to form a fusion bond being carried out to form said bond without the formation of visual discontinuities and to permit non destructive removal of each of said individual articles from an end of said stack by shearing.
Claim 3
Dependent Claim
15 words
The process according to claim 1 wherein said heating zone is a radiant heat source.
Claim 4
Dependent Claim
15 words
The process according to claim 1 wherein said heating zone is a convective heat source.
References Cited (Backward Citations)
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Cited
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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) | 1993-08-06 | 1994-02-05 | 1994-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-06 | 1998-02-05 | 1998-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-06 | 2002-02-05 | 2002-08-07 | $7700.00 | Window Closed / Lapsed |