Patent US3739129A successfully refreshed from Google Patents.
US3739129A
Expired / Lapsed
US
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Tube welding apparatus and method
Assignee: MILLER NORMAN K
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Filing: 1971-11-26
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Granted: 1973-06-12
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Expires: 1991-11-26
Abstract
Abstract Apparatus and method wherein a web of material to be welded is longitudinally fed and simultaneously constrained to a transversely concave configuration, encompassing an arbor or support in the concave relation with web margins overlapping, and welding means welding the overlapping margins in cooperation with the supporting arbor.
Inventors
- 👤 N Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:01
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C53/00; B29C53/36; B29C53/38; B29C53/48; B29C53/50; B29C65/00; B29C65/02; B29C65/04; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/49; B29C66/80; B29C66/82; B29C66/824; B29C66/8242; B29C66/83; B29C66/834; B29C66/8341; B29C66/83421; B29C66/83423; B29C66/81; B29C66/814; B29C66/8145; B29C66/81463; B29C66/81465; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1008; Y10T156/1013
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
173 words
A tube welding apparatus comprising a support for a coil of flexible material to be welded, a guide downstream of said support and having a generally concave guide formation for passing therethrough a web of material from said support and flexing the material to a concave cross-sectional configuration, an arbor spaced downstream from said guide for engagement into the web concavity with the web extending entirely about the arbor and having its margins extending in opposite directions across each other on one side of the arbor, an endless arbor belt extending rotatably about said arbor for rolling engagement with said web margins on the inner side thereof, a welding unit located adjacent to said one arbor side for welding said web margins to define a tube, and an endless welding unit belt extending rotatably about said welding unit for rolling engagement with said web margins on the outer side thereof during said welding, said concave guide formation being smaller than said arbor and arbor belt to urge said web margins across each other.
Claim 2
Dependent Claim
173 words
A tube welding apparatus comprising a support for a coil of flexible material to be welded, a guide downstream of said support and having a generally concave guide formation for passing therethrough a web of material from said support and flexing the material to a concave cross-sectional configuration, an arbor spaced downstream from said guide for engagement into the web concavity with the web extending entirely about the arbor and having its margins extending in opposite directions across each other on one side of the arbor, an endless arbor belt extending rotatably about said arbor for rolling engagement with said web margins on the inner side thereof, a welding unit located adjacent to said one arbor side for welding said web margins to define a tube, and an endless welding unit belt extending rotatably about said welding unit for rolling engagement with said web margins on the outer side thereof during said welding, said concave guide formation being smaller than said arbor and arbor belt to urge said web margins across each other.
Claim 3
Dependent Claim
27 words
A tube welding apparatus according to claim 1, said welding unit belt being rotatable about an axis transverse to said web for drawing engagement with said web.
Claim 4
Dependent Claim
56 words
A tube welding apparatus according to claim 1, wherein said web is flexed to face upwardly, said arbor depending into the web concavity with said margins overlapping each other on the upper side of said arbor, and said welding unit belt being rotatable about an axis transverse to said web for drawing engagement with said web.
Claim 5
Dependent Claim
65 words
A tube welding apparatus according to claim 1, in combination with a reciprocatory printer along the path of movement of said web upstream of said guide and shiftable transversely of the web into and out of printing engagement therewith, and yieldable roller means associated with said printer for withdrawing additional web to permit momentary web stoppage at the printer without stoppage at the welding unit.
Claim 6
Dependent Claim
43 words
A tube welder according to claim 4, in combination with a cut-off station downstream of said welding unit for severing the tube into predetermined lengths, and a fastening station associated with said cut-off station for closing one end of each severed tube length.
Claim 7
Dependent Claim
97 words
In the method of forming tubing of flexible weldable strip material, the steps which comprise: continuously longitudinally supplying a web of such material, flexing the web at an upstream location during said supplying into a concave cross-sectional configuration, locating an arbor interiorly of said concave cross-sectional configuration downstream of said location, further flexing said web at said location to a concave cross-sectional configuration smaller than that of said arbor so as to extend transversely entirely about said arbor with the web margins overlapping each other, and welding said overlapping margins together against said arbor during said supplying.
Claim 8
Dependent Claim
97 words
In the method of forming tubing of flexible weldable strip material, the steps which comprise: continuously longitudinally supplying a web of such material, flexing the web at an upstream location during said supplying into a concave cross-sectional configuration, locating an arbor interiorly of said concave cross-sectional configuration downstream of said location, further flexing said web at said location to a concave cross-sectional configuration smaller than that of said arbor so as to extend transversely entirely about said arbor with the web margins overlapping each other, and welding said overlapping margins together against said arbor during said supplying.
Claim 9
Dependent Claim
17 words
The method according to claim 6, further characterized in frictionally drawing said web to effect said supplying.
Claim 10
Dependent Claim
13 words
The method according to claim 6, further characterized in welding by radio-frequency energy.
Claim 11
Dependent Claim
22 words
The method according to claim 6, further characterized in effecting said flexing by constricting the web for passage through a concave guide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |