US4069080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus of bonding superposed sheets of polymeric material in a linear weld
Assignee: WR Grace and Co
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Filing: 1976-06-11
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Granted: 1978-01-17
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Expires: 1996-06-11
Abstract
Abstract A cylindrical lens system is used to focus a laser beam into a line upon thermoplastic sheets in their area of contact thereby linearly welding the sheets together. By this method flattened thermoplastic tubing may be converted into bags with either straight or curved linear seals.
Inventors
- 👤 Richard Francis Osborne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:27
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/14; B29C65/16; B29C65/1629; B29C65/1645; B23; B23K; B23K26/00; B23K26/02; B23K26/06; B23K26/073; B23K26/0738; B29C65/1635; B29C65/1638; B29C65/1664; B29C65/1667; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/349; B29C66/40; B29C66/41; B29C66/45; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/82; B29C66/826; B29C66/8266; B29C66/71; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29K2027/00; B29K2027/06; B29K2031/00; B29K2031/04; B29K2105/00; B29K2105/0085
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
72 words
A method of welding sheets of polymeric material together with a laser energy source comprising the steps of: a. pneumatically clamping at least two of said sheets together in the area to be welded with air impinging on opposed sides of said sheets; and, b. focusing the beam from said laser energy source into a line upon one side of the clamped area thereby bonding said sheets together in a linear weld.
Claim 2
Independent Claim
72 words
A method of welding sheets of polymeric material together with a laser energy source comprising the steps of: a. pneumatically clamping at least two of said sheets together in the area to be welded with air impinging on opposed sides of said sheets; and, b. focusing the beam from said laser energy source into a line upon one side of the clamped area thereby bonding said sheets together in a linear weld.
Claim 3
Dependent Claim
37 words
The method of claim 1 including the step of focusing a beam of laser energy into a line on the opposed side of said clamped sheets, said lines coinciding from the opposed sides of said clamped sheets.
Claim 4
Dependent Claim
11 words
The method of claim 1 wherein said sheets comprise flattened tubing.
Claim 5
Independent Claim
115 words
A method of welding together sheets of polymeric material with a laser energy source whose energy will be preferentially absorbed in the material of said sheets comprising the steps of: a. splitting the beam from said source into first and second components; b. pneumatically clamping said sheets together with air impinging on opposed sides of said sheets; c. focusing said first beam component into a line upon one side of said clamped sheets; d. directing said second beam component to the opposite side of said sheets; and, e. focusing said second beam component into a line upon the opposite side of said clamped sheets whereby said linear beam components coincide and weld together said sheets.
Claim 6
Independent Claim
115 words
A method of welding together sheets of polymeric material with a laser energy source whose energy will be preferentially absorbed in the material of said sheets comprising the steps of: a. splitting the beam from said source into first and second components; b. pneumatically clamping said sheets together with air impinging on opposed sides of said sheets; c. focusing said first beam component into a line upon one side of said clamped sheets; d. directing said second beam component to the opposite side of said sheets; and, e. focusing said second beam component into a line upon the opposite side of said clamped sheets whereby said linear beam components coincide and weld together said sheets.
Claim 7
Dependent Claim
15 words
The method of claim 4 including the step of splitting said beam into equal components.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |