Patent US3673839A successfully refreshed from Google Patents.
US3673839A
Expired / Lapsed
US
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Method of manufacturing a foil material embossed on both sides,a roll nip and a machine for carrying out the method
Assignee: Individual
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Filing: 1970-08-11
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Granted: 1972-07-04
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Expires: 1990-08-11
Abstract
Abstract A method for embossing foil material by inserting the foil material in the roll nip between two rolls being provided with projections, each projection of a roll being surrounded on all sides by projections of the other roll, each projection of a roll is axially offset relative to the peripherally adjacent projections on the same roll, the projections of one roll form lines oblique to an axial line and so that the foil material from each projection peak on each roll is stretched to the surrounding projection peaks of the other roll.
Inventors
- 👤 Ole Nielsen
- 👤 Max Beidil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:30
CPC Classifications
B; B29; B29C; B29C51/00; B29C51/18; B29C51/20; B29C51/22; B31; B31F; B31F1/00; B31F1/07; B29C51/08; B29C51/082; B31F2201/00; B31F2201/07; B31F2201/0707; B31F2201/0715; B31F2201/0723; B31F2201/0733; B31F2201/0735; B31F2201/0738; B31F2201/0741; B31F2201/0743; B31F2201/0753; B31F2201/0782
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
182 words
A method of embossing a foil material on both sides thereof, comprising feeding a foil material into a roll nip between a pair of rolls each provided with a plurality of projections, a projection on each roll, during operation of said rolls, being surrounded on all sides by projections on the other roll and each projection on a roll being axially offset relative to the peripherally adjacent projections on the same roll, the projections on one roll together with alternating corresponding projections on the other roll forming straight lines substantially parallel to the axes of the rolls, the projections on each roll being defined by a peak surface from which extend lateral oblique surfaces, at least the upper portions of which are of substantially involute shape, securing the foil material at said involute oblique surfaces of mating projections while leaving free for stretching the material at the peak surfaces of each projection, and stretching, as an incidence of the embossing operation, said material substantially only at said peak surfaces of said projections while securing said material against movement at said involuted surfaces.
Claim 2
Independent Claim
182 words
A method of embossing a foil material on both sides thereof, comprising feeding a foil material into a roll nip between a pair of rolls each provided with a plurality of projections, a projection on each roll, during operation of said rolls, being surrounded on all sides by projections on the other roll and each projection on a roll being axially offset relative to the peripherally adjacent projections on the same roll, the projections on one roll together with alternating corresponding projections on the other roll forming straight lines substantially parallel to the axes of the rolls, the projections on each roll being defined by a peak surface from which extend lateral oblique surfaces, at least the upper portions of which are of substantially involute shape, securing the foil material at said involute oblique surfaces of mating projections while leaving free for stretching the material at the peak surfaces of each projection, and stretching, as an incidence of the embossing operation, said material substantially only at said peak surfaces of said projections while securing said material against movement at said involuted surfaces.
Claim 3
Dependent Claim
172 words
Apparatus for embossing a foil material and comprising a pair of rolls defining a nip within which said material is adapted to be fed, each roll being provided with a plurality of projections, a projection on each roll, during operation of said rolls, being surrounded on all sides by projections on the other roll, and each projection on a roll being axially offset relative to the peripherally adjacent projections on the same roll, the projections on one roll together with alternating corresponding projections on the other roll forming straight lines substantially parallel to the axes of the rolls, each projection on each roll being defined by a peak surface from which extend lateral oblique surfaces at an angle with respect thereto greater than 90*, at least the upper portion of said oblique surfaces of each projection on each roll being involuted for engagement of complementary mating involuted surfaces of said projections on said rolls, the peak surface of each projection on each roll being of smaller extent than the lateral oblique surfaces.
Claim 4
Dependent Claim
172 words
Apparatus for embossing a foil material and comprising a pair of rolls defining a nip within which said material is adapted to be fed, each roll being provided with a plurality of projections, a projection on each roll, during operation of said rolls, being surrounded on all sides by projections on the other roll, and each projection on a roll being axially offset relative to the peripherally adjacent projections on the same roll, the projections on one roll together with alternating corresponding projections on the other roll forming straight lines substantially parallel to the axes of the rolls, each projection on each roll being defined by a peak surface from which extend lateral oblique surfaces at an angle with respect thereto greater than 90*, at least the upper portion of said oblique surfaces of each projection on each roll being involuted for engagement of complementary mating involuted surfaces of said projections on said rolls, the peak surface of each projection on each roll being of smaller extent than the lateral oblique surfaces.
Claim 5
Dependent Claim
21 words
Apparatus according to claim 2, characterized in that the complementary involuted surfaces of mating projections engage at an angle of 20*.
Claim 6
Dependent Claim
28 words
Apparatus according to claim 3, wherein the projections are formed by providing parallel grooves in two mutually intersecting directions, at least one of the two directions being oblique.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 4, wherein the angle between each of the two directions and the axial direction is less than 45*.
Claim 8
Dependent Claim
16 words
Apparatus according to claim 5, wherein the angle is in the range of 38* to 41*.
Claim 9
Dependent Claim
35 words
Apparatus according to claim 3, wherein the peak surface of each projection is essentially flat, there being a well defined and rounded transition from said peak surface to said lateral oblique surfaces of each projection.
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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |