US3943030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing suitcase frames
Assignee: Danalet Kufferfabrik AS
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Filing: 1974-07-11
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Granted: 1976-03-09
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Expires: 1994-07-11
Abstract
Abstract In an apparatus comprising a non-circular rotary mandrel on which a strip of paper or a similar sheet material is wound to form a multilayer tubular article, the material entering the mandrel is subjected to pressure thereagainst by means of a roller unit including at least two pairs of rollers. Both pairs of rollers are independently and pivotably suspended in a common carrier so that all of the rollers may continuously and independently apply a surface pressure to the material being wound onto the mandrel.
Inventors
- 👤 Harry Herbert Olsen
- 👤 Mogens Ivan Hjort
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:26
CPC Classifications
B; B31; B31C; B31C1/00; A; A45; A45C; A45C13/00; B65; B65H; B65H81/00; B65H81/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
159 words
An apparatus for producing wound suitcase frames and comprising a mandrel having a substantially rectangular shape with rounded corner portions and journalled for rotation about a horizontal axis, means for carrying a feed roll of strip material to be wound around said mandrel by the rotation thereof, and a roller assembly including an elongated primary support member having one end pivotally mounted on an axis parallel to the axis of said mandrel, a pair of secondary support members pivotally mounted on said primary support member at the other end thereof for rotation about axes parallel to said axis of said mandrel, two pressure rolls mounted on each of said secondary support members for rotation about axes spaced from one another around said mandrel and parallel to the axis of said mandrel, and means resiliently urging said primary support member toward said mandrel to press each of said pressure rolls into contact with strip material being wound onto said mandrel.
Claim 2
Independent Claim
159 words
An apparatus for producing wound suitcase frames and comprising a mandrel having a substantially rectangular shape with rounded corner portions and journalled for rotation about a horizontal axis, means for carrying a feed roll of strip material to be wound around said mandrel by the rotation thereof, and a roller assembly including an elongated primary support member having one end pivotally mounted on an axis parallel to the axis of said mandrel, a pair of secondary support members pivotally mounted on said primary support member at the other end thereof for rotation about axes parallel to said axis of said mandrel, two pressure rolls mounted on each of said secondary support members for rotation about axes spaced from one another around said mandrel and parallel to the axis of said mandrel, and means resiliently urging said primary support member toward said mandrel to press each of said pressure rolls into contact with strip material being wound onto said mandrel.
Claim 3
Dependent Claim
38 words
An apparatus as claimed in claim 3 further comprising a knife mounted between said mandrel and said means carrying a feed roll for longitudinally cutting through the strip of material to be wound is provided adjacent the mandrel.
References Cited (Backward Citations)
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US2218027A
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US2388541A
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US2495167A
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US3076493A
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US3190783A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-09 | 1979-09-08 | 1980-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-09 | 1983-09-08 | 1984-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-09 | 1987-09-08 | 1988-03-09 | $7700.00 | Window Closed / Lapsed |