US4347091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the production of jackets for recording disks
Assignee: BASF SE
•
Filing: 1981-04-15
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Granted: 1982-08-31
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Expires: 2001-04-15
Abstract
Abstract An apparatus for the production of a jacket for a recording disk from a foldable blank, comprising a stationary receiving surface for one half of the blank and a further surface, pivotable essentially through an angle of 180°, for bending over the other half of the blank; a sheet-like spacer member which can be positioned over the stationary receiving surface, and one of whose edges, serving as a folding blade, is allocated to the swing point of the two said surfaces; and means for heating the fold area of the blank.
Inventors
- 👤 Karl Hauck
- 👤 Hubert Fehrenbach
- 👤 Dieter Mayer
- 👤 Herbert Wagner
- 👤 Kurt Zwintzscher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/0003; B31F1/0006; B31F1/0009; B31F1/0016; B31B; B31B50/00; B31B50/26; B31B50/52; B31B2241/00; B31B2241/007; Y; Y10; Y10S; Y10S493/00; Y10S493/946; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1036; Y10T156/1051
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
198 words
In an apparatus for the production of a jacket for a recording disk from a foldable blanket of plastic material, comprising a stationary surface provided with positioning elements for receiving one-half of the blank, at least one sheet-like spacer member extending the length of the fold to be made and having an edge serving as a folding blade, means for positioning said spacer member on said stationary surface, means having a surface for bending the other half of the blade, through an angle of 180°, over said spacer member and said one-half of the blank, and means for heating the fold area of the blade incident to said folding, the improvement that, for minimizing the outward buckling of the jacket as a result of the residual restoring force of the plastic material at the fold, there are provided after treatment means including: a bar extending parallel to the folding blade of the spacer member and having a groove whose cross-sectional shape corresponds to that of the external diameter of the completed jacket, heat-producing means in said bar which are connectable to a source of energy, and means for moving said bar towards and away from the folding blade.
Claim 2
Dependent Claim
198 words
In an apparatus for the production of a jacket for a recording disk from a foldable blanket of plastic material, comprising a stationary surface provided with positioning elements for receiving one-half of the blank, at least one sheet-like spacer member extending the length of the fold to be made and having an edge serving as a folding blade, means for positioning said spacer member on said stationary surface, means having a surface for bending the other half of the blade, through an angle of 180°, over said spacer member and said one-half of the blank, and means for heating the fold area of the blade incident to said folding, the improvement that, for minimizing the outward buckling of the jacket as a result of the residual restoring force of the plastic material at the fold, there are provided after treatment means including: a bar extending parallel to the folding blade of the spacer member and having a groove whose cross-sectional shape corresponds to that of the external diameter of the completed jacket, heat-producing means in said bar which are connectable to a source of energy, and means for moving said bar towards and away from the folding blade.
Claim 3
Dependent Claim
18 words
The improvement as claimed in claim 1, wherein said heat producing means are of the electrical resistance type.
Claim 4
Dependent Claim
17 words
The improvement as claimed in claim 1, wherein said heat producing means are of the inductive type.
Claim 5
Dependent Claim
33 words
The improvement as claimed in claim 1, wherein the heat producing means are provided with an electrode connected to a high frequency generator, for the dielectric heating of the fold in the blank.
Claim 6
Dependent Claim
22 words
The improvement as claimed in claim 1, wherein the heater bar has a cavity for the passage of a heating medium therethrough.
Claim 7
Dependent Claim
14 words
The improvement as claimed in claim 1, wherein the heater bar is pivotally mounted.
Claim 8
Dependent Claim
181 words
In a process for manufacturing a jacket for a recording disk from a foldable blank of plastic material, in which the blank, having two half-sections, is placed on a support surface, a sheet-like spacer member having a front edge serving as a folding blade is placed on top of one of the half-sections of the blank, the projecting other half-section is folded, upon the application of heat, over said folding blade and the first-mentioned half-section and the marginal portions of the two half-sections are then joined together, a method for minimizing the outward deformation of the jacket as a result of the residual restoring force of the plastic material at the fold, said method comprising the after treatment of uring, subsequent to the folding of said one half-section over the other half-section and with the spacer member still in place, a pressure element extending parallel to the fold against the outside of said fold under the application of heat, said pressure element having lengthwise thereof a substantially semi-cylindrical groove with a diameter corresponding to the external dimension of the completed jacket.
Claim 9
Dependent Claim
181 words
In a process for manufacturing a jacket for a recording disk from a foldable blank of plastic material, in which the blank, having two half-sections, is placed on a support surface, a sheet-like spacer member having a front edge serving as a folding blade is placed on top of one of the half-sections of the blank, the projecting other half-section is folded, upon the application of heat, over said folding blade and the first-mentioned half-section and the marginal portions of the two half-sections are then joined together, a method for minimizing the outward deformation of the jacket as a result of the residual restoring force of the plastic material at the fold, said method comprising the after treatment of uring, subsequent to the folding of said one half-section over the other half-section and with the spacer member still in place, a pressure element extending parallel to the fold against the outside of said fold under the application of heat, said pressure element having lengthwise thereof a substantially semi-cylindrical groove with a diameter corresponding to the external dimension of the completed jacket.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |