EP0107421A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Stretched surface recording disk and method of manufacture
Assignee: 3M Co
•
Filing: 1983-10-05
•
Granted: —
•
Expires: 2003-10-05
Abstract
Abstract A support (12) for a stretched recording film (14) and method off attaching the film (14) to the support (12). The support (12) includes a flat disk-shaped base (16), an annular upstanding rim (18) which terminates in a reference surface (20), an annular radially extending bonding lip (22) which includes a bonding surface (24) inclined with respect to the plane of the base (16), and a groove (26) separating the reference surface (20) and the bonding surface (24). The method of attaching the film (14) to the support (12) includes deflecting the center of the base (16) to decrease the diameter of the bonding surface (24), bonding the film (14) to the bonding surface (24), and ceasing to deflect the base (16) so that the diameter of the bonding surface (24) increases to induce tension in the film (14). A second protective layer of film (42) may be simultaneously stretched over and bonded to the first layer of film (38).
Inventors
- 👤 Sheldon L. Pastor
- 👤 John W. Louks
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
G; G11; G11B; G11B23/00; B; B29; B29D; B29D17/00; B29D17/005; G11B5/00; G11B5/74; G11B5/82; G11B5/825
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
104 words
A support structure (12) for a taut film (14) comprising: a disk-shaped base (16); an annular upstanding rim (18) attached to the perimeter of said base (16) and terminating in a film reference surface (20) defining a plane parallel to said base (16) and spaced from said base (16) for supporting said film (14) in parallel spaced relationship to said base (16); and an annular film bonding lip (22) extending radially from said rim (18) away from the center of said base (16) and including an inclined film bonding surface (24) extending from said reference surface (20) toward the plane of said base (16).
Claim 2
Dependent Claim
104 words
A support structure (12) for a taut film (14) comprising: a disk-shaped base (16); an annular upstanding rim (18) attached to the perimeter of said base (16) and terminating in a film reference surface (20) defining a plane parallel to said base (16) and spaced from said base (16) for supporting said film (14) in parallel spaced relationship to said base (16); and an annular film bonding lip (22) extending radially from said rim (18) away from the center of said base (16) and including an inclined film bonding surface (24) extending from said reference surface (20) toward the plane of said base (16).
Claim 3
Dependent Claim
37 words
The support structure (12) of claim 1 further comprising an annular groove (26) separating said reference surface (20) and said bonding surface (24) and wherein the extension of said bonding surface (24) intersects said reference surface (20).
Claim 4
Dependent Claim
35 words
The support structure (12) of claim 1 wherein said bonding surface (24)-is planar in cross-section and inclined with respect to said plane of said base (16) to define a frustum of a right circular cone.
Claim 5
Dependent Claim
37 words
The support structure (12) of claim 3 further comprising an annular groove (26) separating said reference surface (20) and said bonding surface (24) and wherein the extension of said bonding surface (24) intersects said reference surface (20).
Claim 6
Dependent Claim
91 words
A taut film (38, 42) and support (12) assembly comprising: a concave support (16) including a film bonding surface (24); a first film (38) bonded to said bonding surface (24); a second film (42) overlying and bonded to said first film (38), the bond between said first (38) and second (42) films being less strong than the bond between said first film (38) and said bonding surface (24) so that said second film (42) may be removed without disturbing the bond between said bonding surface (24) and said first film (38).
Claim 7
Dependent Claim
91 words
A taut film (38, 42) and support (12) assembly comprising: a concave support (16) including a film bonding surface (24); a first film (38) bonded to said bonding surface (24); a second film (42) overlying and bonded to said first film (38), the bond between said first (38) and second (42) films being less strong than the bond between said first film (38) and said bonding surface (24) so that said second film (42) may be removed without disturbing the bond between said bonding surface (24) and said first film (38).
Claim 8
Dependent Claim
111 words
The film (38, 42) and support (12) assembly of claim 5 wherein said support (12) comprises: a disk-shaped base (16); an annular upstanding rim (18) attached to the perimeter of said base (16) and terminating in a film reference surface (20) defining a plane parallel to said base (16) and spaced from said base (16) for supporting said film (38, 42) in parallel spaced relationship to said base (16); and an annular film bonding lip (22) extending radially from said rim (18) away from the center of said base (16) and including said film bonding surface (24) which extends from said reference surface (20) toward the plane of said base (16).
Claim 9
Dependent Claim
41 words
The film (38, 42) and support (12) assembly of claim 6 further comprising an annular groove (26) separating said reference surface (20) and said bonding surface (24) and wherein the extension of said bonding surface (24) intersects said reference surface (20).
Claim 10
Dependent Claim
40 words
The film (38, 42) and support (12) assembly of claim 6 wherein said bonding surface (24) is planar in cross-section and inclined with respect to said plane of said base (16) to define a frustum of a right circular cone.
Claim 11
Dependent Claim
41 words
The film (38, 42) and support (12) assembly of claim 8 further comprising an annular groove (26) separating said reference surface (20) and said bonding surface (24) and wherein the extension of said bonding surface (24) intersects said reference surface (20).
Claim 12
Dependent Claim
28 words
The film (38, 42) and support (12) assembly of claim 5 further including a magnetizable coating attached to the surface of said first film (38) opposite said support.
Claim 13
Dependent Claim
19 words
The film (38, 42) and support (12) assembly of claim 10 wherein said magnetizable coating is an iron oxide.
Claim 14
Independent Claim
127 words
A method of attaching film (14) to a support (12) which includes a disk-shaped base (16) and an upstanding annular rim (18) extending from the perimeter of said base (16) and terminating in a bonding surface (24) comprising: stretching a recording film (14) to cover said bonding surface (24); supporting the perimeter of said base (16) opposite said bonding surface (24); deflecting the center of said base (16) perpendicular to the plane of said base (16) in the direction away from said bonding surface (24) so that said bonding surface (24) decreases in diameter; bonding said recording film (14) to said bonding surface (24); and ceasing to deflect said base (16) so that the diameter of said bonding surface (24) increases to tension said recording film (14).
Claim 15
Independent Claim
127 words
A method of attaching film (14) to a support (12) which includes a disk-shaped base (16) and an upstanding annular rim (18) extending from the perimeter of said base (16) and terminating in a bonding surface (24) comprising: stretching a recording film (14) to cover said bonding surface (24); supporting the perimeter of said base (16) opposite said bonding surface (24); deflecting the center of said base (16) perpendicular to the plane of said base (16) in the direction away from said bonding surface (24) so that said bonding surface (24) decreases in diameter; bonding said recording film (14) to said bonding surface (24); and ceasing to deflect said base (16) so that the diameter of said bonding surface (24) increases to tension said recording film (14).
Claim 16
Dependent Claim
23 words
The method of claim 12 wherein said bonding of said recording film (14) to said bonding surface (24) is accomplished by ultrasonic welding.
Claim 17
Dependent Claim
20 words
The method of claim 12 further including the step of bonding a protective film (42) to said recording film (38).
Claim 18
Dependent Claim
36 words
The method of claim 14 wherein said bonding of said recording film (38) to said bonding surface (24) and said bonding of said protective film (42) to said recording film (38) is accomplished by ultrasonic welding.
Claim 19
Dependent Claim
34 words
The method of claim 15 wherein said welding of said recording film (38) to said bonding surface (24) and said welding of said protective film (42) to said recording film (38) is accomplished simultaneously.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.