US3854031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding apparatus
Assignee: Windmoeller and Hoelscher KG
•
Filing: 1973-05-23
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Granted: 1974-12-10
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Expires: 1993-05-23
Abstract
Abstract A plurality of superposed heat-fusable films are slung about a rotary welding cylinder equipped with a plurality of welding bars effective to produce transverse weld seams at intervals along the length of the films in a continuous operation. A backing cylinder co-operating with the welding cylinder and turning at the same peripheral speed as the welding cylinder is equipped with a plurality of pressure bars effective to exert pressure on the superposed films at the desired locations of the weld seams when the welding bars underlie the pressure bars.
Inventors
- 👤 J Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:27
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/229; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/80; B29C66/81; B29C66/816; B29C66/8161; B29C66/83; B29C66/834; B29C66/8351; B29C66/83511; B29C66/83513; B29C66/90; B29C66/92; B29C66/924; B29C66/9241; B29C66/92431; B29C66/02; B29C66/024; B29C66/0242; B29C66/818; B31; B31B; B31B2150/00; B31B2150/002; B31B70/00; B31B70/02; B31B70/022; B31B70/024; B31B70/74; B31B70/92; B31B70/94; B31B70/946
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
118 words
Apparatus for fusing a plurality of superposed continuously fed plastics films or the like to one another by means of transverse weld seams, comprising a rotary welding cylinder about which the films are partially slung, a plurality of welding bars carried by the welding cylinder at its periphery, a backing cylinder mounted on a rotary shaft for exerting pressure on the superposed films, a plurality of pressure bars provided on the backing cylinder at a pitch corresponding to that of the welding bars, and means for rotating the backing cylinder at the same peripheral speed as the welding cylinder, the rotary shaft of the backing cylinder being adjustable in position along an arc concentric with the welding cylinder.
Claim 2
Dependent Claim
118 words
Apparatus for fusing a plurality of superposed continuously fed plastics films or the like to one another by means of transverse weld seams, comprising a rotary welding cylinder about which the films are partially slung, a plurality of welding bars carried by the welding cylinder at its periphery, a backing cylinder mounted on a rotary shaft for exerting pressure on the superposed films, a plurality of pressure bars provided on the backing cylinder at a pitch corresponding to that of the welding bars, and means for rotating the backing cylinder at the same peripheral speed as the welding cylinder, the rotary shaft of the backing cylinder being adjustable in position along an arc concentric with the welding cylinder.
Claim 3
Dependent Claim
23 words
Apparatus according to claim 1, wherein the backing cylinder is provided with T slots for receiving replaceable clamping means for the pressure bars.
Claim 4
Dependent Claim
27 words
Apparatus according to claim 1, wherein the backing cylinder is provided with peripherally extending rows of apertures for selectively receiving replaceable insert fasteners for the pressure bars.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 1, wherein the ratio of the welding cylinder diameter to the backing cylinder diameter is a whole number.
Claim 6
Dependent Claim
22 words
Apparatus according to claim 1, wherein the oPerative faces of all the pressure bars are disposed on a common imaginary enveloping cylinder.
Claim 7
Dependent Claim
19 words
Apparatus according to claim 1, wherein the operative face of each pressure bar is covered with an anti-adhesion layer.
Claim 8
Dependent Claim
21 words
Apparatus according to claim 1, wherein each pressure bar is mounted to permit it to yield radially of the backing cylinder.
Claim 9
Dependent Claim
17 words
Apparatus according to claim 1, wherein each pressure bar is in the form of a welding bar.
References Cited (Backward Citations)
US2163278A
Cited
US2483155A
Cited
US2697314A
Cited
US2691613A
Cited
US2737859A
Cited
US3054441A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |