US3892012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for forming rolls of continuously supplied sheet material
Assignee: Reifenhauser KG
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Filing: 1974-04-08
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Granted: 1975-07-01
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Expires: 1994-04-08
Abstract
Abstract Continuously supplied sheet material, e.g. synthetic-resin foils is wrapped around the upper of two vertically spaced cores as these cores are rotated about their axes. The two cores are then swung through 180* to move the upper core to the position of the lower core and vice versa, thereby stretching the sheet over a deflecting roller extending between a pair of mounting assemblies or stars (spiders) carrying these cores. The core then in the lower position is rotated until the outer surface of the roll formed thereon is immediately adjacent the upper core, whereupon the sheet is cut and the cut end is wound on the upper core. The lower filled core is replaced with an empty core and the mounting assemblies are again swung through 180*.
Inventors
- 👤 Horst Keferstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:29
CPC Classifications
B; B65; B65H; B65H19/00; B65H19/22; B65H19/2207; B65H19/2215; B65H2408/00; B65H2408/20; B65H2408/23; B65H2408/231; B65H2408/2315; B65H2408/23152
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
193 words
An apparatus for forming rolls of a continuously supplied sheet, said apparatus comprising: two mounting assemblies jointly rotatable about a rotation axis and carrying two pairs of holders defining a pair of parallel core axes parallel to said rotation axis and diametrically across said rotation axis from each other, one holder of each of said pairs being provided on each of said assemblies; a pair of elongated parallel deflecting elements extending parallel to said rotation axis between said assemblies and lying to either side of a core plane including said rotation axis and said core axes; means for rotating about said core axes cores carried on said holders and each lying along a respective core axis; means for wrapping said sheet around one of said cores, whereby said sheet is wound up on said one core, and for cutting said sheet and wrapping same about the other core when said one core is filled, whereby said sheet is wound up on said other core; and means for rotating said assemblies and said elements about said rotation axis through substantially 180* after cutting of said sheet and wrapping of same about said other core.
Claim 2
Independent Claim
193 words
An apparatus for forming rolls of a continuously supplied sheet, said apparatus comprising: two mounting assemblies jointly rotatable about a rotation axis and carrying two pairs of holders defining a pair of parallel core axes parallel to said rotation axis and diametrically across said rotation axis from each other, one holder of each of said pairs being provided on each of said assemblies; a pair of elongated parallel deflecting elements extending parallel to said rotation axis between said assemblies and lying to either side of a core plane including said rotation axis and said core axes; means for rotating about said core axes cores carried on said holders and each lying along a respective core axis; means for wrapping said sheet around one of said cores, whereby said sheet is wound up on said one core, and for cutting said sheet and wrapping same about the other core when said one core is filled, whereby said sheet is wound up on said other core; and means for rotating said assemblies and said elements about said rotation axis through substantially 180* after cutting of said sheet and wrapping of same about said other core.
Claim 3
Dependent Claim
24 words
The apparatus defined in claim 1 wherein said core axes are spaced apart by a distance substantially smaller than the distance between said elements.
Claim 4
Dependent Claim
29 words
The apparatus defined in claim 2 wherein said elements have element axes defining with said rotation axis an element plane generally perpendicular to the plane of said core axes.
Claim 5
Dependent Claim
19 words
The apparatus defined in claim 3 wherein said elements are generally cylindrical idler rollers centered on said element axes.
Claim 6
Dependent Claim
28 words
The apparatus defined in claim 4 wherein said core axes are spaced apart by a distance equal to between one-third and two-thirds of the distance between said elements.
Claim 7
Dependent Claim
24 words
The apparatus defined in claim 5 wherein said assemblies each include a pair of oppositely radially extending arms, said rollers extending between said arms.
Claim 8
Dependent Claim
29 words
The apparatus defined in claim 6 wherein the holders of at least one of said pairs of holders are axially displaceable relative to the holders of the other pair.
Claim 9
Dependent Claim
22 words
The apparatus defined in claim 7 wherein said element plane lies at an angle of between 20* and 40* to the horizontal.
Claim 10
Dependent Claim
24 words
The apparatus defined in claim 8 wherein the axes of said rollers are spaced apart by about twice the distance between said core axes.
Claim 11
Dependent Claim
19 words
The apparatus defined in claim 9 wherein said element plane includes an angle of substantially 30* with the horizontal.
Claim 12
Independent Claim
168 words
A method of making rolls of sheet material comprising the steps of: continuously feeding an elongated sheet to a winding location; winding said sheet at said location about an elongated first core by rotating same about its longitudinal axis; displacing said core through substantially 180* about a rotation axis parallel to the axis of the first core while continuing to wind said sheet therearound; Cutting said sheet and wrapping same around a second elongated core having a longitudinal axis parallel to said rotation axis and diametrically opposed to the axis of said first core when the sheet wound on said first core forms a roll extending past said rotation axis and approaching said second core; thereafter winding said sheet about said second core by rotating same about its longitudinal axis; thereafter removing said first core from said location, disposing another such first core in the place of the removed first core, and displacing the fresh first core and said second core through substantially 180* about said rotation axis.
Claim 13
Independent Claim
168 words
A method of making rolls of sheet material comprising the steps of: continuously feeding an elongated sheet to a winding location; winding said sheet at said location about an elongated first core by rotating same about its longitudinal axis; displacing said core through substantially 180* about a rotation axis parallel to the axis of the first core while continuing to wind said sheet therearound; Cutting said sheet and wrapping same around a second elongated core having a longitudinal axis parallel to said rotation axis and diametrically opposed to the axis of said first core when the sheet wound on said first core forms a roll extending past said rotation axis and approaching said second core; thereafter winding said sheet about said second core by rotating same about its longitudinal axis; thereafter removing said first core from said location, disposing another such first core in the place of the removed first core, and displacing the fresh first core and said second core through substantially 180* about said rotation axis.
Claim 14
Dependent Claim
45 words
The method defined in claim 9 wherein after winding of said sheet around one of said cores, said one core is moved through 180* from an upper position to a lower position below said upper position, said core being removed while in said lower position.
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) | 1978-06-30 | 1978-12-30 | 1979-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-30 | 1982-12-30 | 1983-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-30 | 1986-12-30 | 1987-07-01 | $7700.00 | Window Closed / Lapsed |