US3854861A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rollers for shaping sheet material
Assignee: United Kingdom Atomic Energy Authority
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Filing: 1972-12-04
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Granted: 1974-12-17
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Expires: 1992-12-04
Abstract
Abstract One of a pair of rollers for handling sheet material is of hollow construction and is made porous so that application of a suction to the interior of the roller results in the sheet material being sucked on to the exterior of the roller. The roller has a corrugated periphery so that sheet material becomes corrugated by sucking it on to the exterior of the roller. The arrangement dispenses with the need for intermeshing corrugated rollers. Hence roller wear is reduced substantially.
Inventors
- 👤 G Worrall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:52
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/28; B23; B23K; B23K20/00; B23K20/04; B29; B29C; B29C51/00; B29C51/18; B29C51/20; B29C51/22; B29C51/225; B29C53/00; B29C53/22; B29C53/24; B29C53/28; B29C53/285; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/245; B29C65/78; B29C65/7841; B29C65/7847; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/13; B29C66/131; B29C66/40; B29C66/41; B29C66/43; B29C66/438; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C66/80; B29C66/81; B29C66/812; B29C66/8124; B29C66/81241; B29C66/83; B29C66/834; B29C66/8341; B29C66/83411; B29C66/8351; B29C66/83511; B29C66/83517; B32B27/00; B32B27/06; B32B27/08; B32B38/00; B32B38/0036; B32B38/004; B32B38/06; F; F16; F16C; F16C13/00; B29K; B29K2995/00; B29K2995/0037; B29K2995/0065; B29L; B29L2016/00; B32B2305/00; B32B2305/80; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1016; Y10T156/1025; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
Apparatus comprising a pair of rollers defining a nip through which superimposed sheets of thermoplastic material may be passed so as to be welded together to form bandoleer-like articles, one of said pair of rollers having a corrugated periphery and the other roller having a plain periphery, the corrugated roller also having a hollow center, a plurality of airflow passageways extending between the hollow center and the corrugated periphery, stationary partition means for dividing the hollow center into two separate compartments which, at the interior surface of the hollow roller, are located on opposite sides of a plane through the nip and the centers of the two rollers such that as the corrugated roller rotates, passageways on opposite sides of the said plane through the nip are connected to different of said compartments, air suction means for connecting to suction the compartment from which, as the corrugated roller rotates, the passageways on the entry side of the nip extend, air discharge means for connecting to a pressure source the compartment from which, as the corrugated roller rotates, the passageways on the exit side of the nip extend and means for heating the rollers.
Claim 2
Dependent Claim
193 words
Apparatus comprising a pair of rollers defining a nip through which superimposed sheets of thermoplastic material may be passed so as to be welded together to form bandoleer-like articles, one of said pair of rollers having a corrugated periphery and the other roller having a plain periphery, the corrugated roller also having a hollow center, a plurality of airflow passageways extending between the hollow center and the corrugated periphery, stationary partition means for dividing the hollow center into two separate compartments which, at the interior surface of the hollow roller, are located on opposite sides of a plane through the nip and the centers of the two rollers such that as the corrugated roller rotates, passageways on opposite sides of the said plane through the nip are connected to different of said compartments, air suction means for connecting to suction the compartment from which, as the corrugated roller rotates, the passageways on the entry side of the nip extend, air discharge means for connecting to a pressure source the compartment from which, as the corrugated roller rotates, the passageways on the exit side of the nip extend and means for heating the rollers.
Claim 3
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein the corrugated roller is of porous form.
Claim 4
Dependent Claim
14 words
Apparatus as claimed in claim 1 wherein the corrugated roller is of sintered construction.
Claim 5
Dependent Claim
30 words
Apparatus as claimed in claim 1 wherein the stationary partition means comprise a stationary baffle and including rubbing seals disposed between the baffle and the surface of the hollow center.
References Cited (Backward Citations)
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US3231647A
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US3226458A
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US3179726A
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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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |