Patent US3720381A successfully refreshed from Google Patents.
US3720381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centerless winding of a roll of foil
Assignee: KraussMaffei Extrusion GmbH
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Filing: 1971-02-18
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Granted: 1973-03-13
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Expires: 1991-02-18
Abstract
Abstract Apparatus for the centerless winding of a roll of foil comprises a pressure roller which urges a core and the foil against a rotating contact roller to cause preliminary winding of the foil on the core. The partially wound core is then transferred to a final winding position for completion of the winding followed by wrapping.
Inventors
- 👤 H Muller
- 👤 H Rehme
- 👤 M Dienst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:57
CPC Classifications
B; B65; B65H; B65H19/00; B65H19/22; B65H19/2238; B65H19/2246; B65H19/2253; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/413; B65H2301/4136; B65H2301/41361; B65H2301/417; B65H2301/418; B65H2301/4181; B65H2301/41814; B65H2301/4182; B65H2301/41822; B65H2408/00; B65H2408/20; B65H2408/23; B65H2408/235; B65H2801/00; B65H2801/81
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
145 words
Apparatus for the centerless winding of a length of foil into a core, said apparatus comprising a core magazine, a contact-pressure device for pressing the foil against a core discharged from said magazine, a first rotating contact roller, a pressure roller urging the core and foil against said contact roller to cause rotation of said core and preliminary winding of the foil on the core, means defining a final winding position, means for transferring the partially wound core to said final winding position, cutter means actuable to cut the foil when a predetermined length has been wound onto the core at said final winding position, a pressure roller in continuous contact with the roll wound at said final winding position, and means actuating said pressure roller at said final winding position, the pressure applied being reduced as the diameter of the roll being wound increases.
Claim 2
Dependent Claim
145 words
Apparatus for the centerless winding of a length of foil into a core, said apparatus comprising a core magazine, a contact-pressure device for pressing the foil against a core discharged from said magazine, a first rotating contact roller, a pressure roller urging the core and foil against said contact roller to cause rotation of said core and preliminary winding of the foil on the core, means defining a final winding position, means for transferring the partially wound core to said final winding position, cutter means actuable to cut the foil when a predetermined length has been wound onto the core at said final winding position, a pressure roller in continuous contact with the roll wound at said final winding position, and means actuating said pressure roller at said final winding position, the pressure applied being reduced as the diameter of the roll being wound increases.
Claim 3
Dependent Claim
145 words
Apparatus for the centerless winding of a length of foil into a core, said apparatus comprising a core magazine, a contact-pressure device for pressing the foil against a core discharged from said magazine, a first rotating contact roller, a pressure roller urging the core and foil against said contact roller to cause rotation of said core and preliminary winding of the foil on the core, means defining a final winding position, means for transferring the partially wound core to said final winding position, cutter means actuable to cut the foil when a predetermined length has been wound onto the core at said final winding position, a pressure roller in continuous contact with the roll wound at said final winding position, and means actuating said pressure roller at said final winding position, the pressure applied being reduced as the diameter of the roll being wound increases.
Claim 4
Dependent Claim
145 words
Apparatus for the centerless winding of a length of foil into a core, said apparatus comprising a core magazine, a contact-pressure device for pressing the foil against a core discharged from said magazine, a first rotating contact roller, a pressure roller urging the core and foil against said contact roller to cause rotation of said core and preliminary winding of the foil on the core, means defining a final winding position, means for transferring the partially wound core to said final winding position, cutter means actuable to cut the foil when a predetermined length has been wound onto the core at said final winding position, a pressure roller in continuous contact with the roll wound at said final winding position, and means actuating said pressure roller at said final winding position, the pressure applied being reduced as the diameter of the roll being wound increases.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |