US3932087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement in moulding presses with parted press tools for the production of hot-pressed plastic material products, especially grammophone records
Assignee: Toolex Alpha AB
•
Filing: 1975-01-02
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Granted: 1976-01-13
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Expires: 1995-01-02
Abstract
Abstract In a moulding press with parted press tools for producing hot-pressed products of plastic materials, particularly grammophone records, an arrangement for holding and handling the products, which is movable between the pressing area and a stripping apparatus situated outside said area, said arrangement incorporating a holder provided with means for anchoring the pressed product to it while utilizing the excess material exuding during pressing from between the tool halves.
Inventors
- 👤 Osten Karl Alf Nilsson
- 👤 Curt Lindell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:04
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/02; B29L; B29L2017/00; B29L2017/001; B29L2017/003; Y; Y10; Y10S; Y10S425/00; Y10S425/81
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
198 words
An arrangement in moulding presses with parted press tools for the production of hot-pressed products of plastic material, especially grammophone records, a holder for the pressed product being arranged, before starting the pressing operation to be entered into an exuding zone for the excess material from the pressing operation to assure its position in the press, and subsequent to the termination of the pressing operation, in company with the ready-pressed product attached thereto through the intermediary of the excess material exuded during the pressing operation, to be moved away to an apparatus for releasing the ready-pressed product from the holder, situated outside the pressing area, characterized in that the holder presents a ring, encircling at least the major portion of the perimeter of the pressed product, comprising a plurality of anchoring means distributed in and along the exuding zone of the excess material for attaching the pressed product to the holder by the excess material exuding onto, and solidifying in engagement with said anchoring means, and that said apparatus includes a shearing means, movable essentially transverse to the plane of the ring of anchoring means, for breaking the pressed product loose in the region of said anchoring means.
Claim 2
Dependent Claim
198 words
An arrangement in moulding presses with parted press tools for the production of hot-pressed products of plastic material, especially grammophone records, a holder for the pressed product being arranged, before starting the pressing operation to be entered into an exuding zone for the excess material from the pressing operation to assure its position in the press, and subsequent to the termination of the pressing operation, in company with the ready-pressed product attached thereto through the intermediary of the excess material exuded during the pressing operation, to be moved away to an apparatus for releasing the ready-pressed product from the holder, situated outside the pressing area, characterized in that the holder presents a ring, encircling at least the major portion of the perimeter of the pressed product, comprising a plurality of anchoring means distributed in and along the exuding zone of the excess material for attaching the pressed product to the holder by the excess material exuding onto, and solidifying in engagement with said anchoring means, and that said apparatus includes a shearing means, movable essentially transverse to the plane of the ring of anchoring means, for breaking the pressed product loose in the region of said anchoring means.
Claim 3
Dependent Claim
28 words
An arrangement as claimed in claim 1, characterized in that the anchoring means consists of holes or concavities in the holder itself or projections united with its body.
Claim 4
Dependent Claim
52 words
An arrangement as claimed in claim 2, the anchoring means being arranged directly in the material of the holder, characterized in that the anchoring means constitute cavities having the surface of a spherical segment, for facilitating their cleaning from excess material solidified therein when preparing the holder for a subsequent pressing operation.
Claim 5
Dependent Claim
50 words
An arrangement as claimed in claim 2, the anchoring means being arranged directly in the material of the holder, characterized in that the anchoring means constitute open recesses formed with surfaces which lock the solidified excess material which has flowed thereinto against unintentional expulsion through the openings of the recesses.
Claim 6
Dependent Claim
19 words
An arrangement as claimed in claim 4, characterized in that the recesses constitute undercut holes, slots or the like.
Claim 7
Dependent Claim
29 words
An arrangement as claimed in claim 5, characterized in that the holes have the form of a truncated cone with the lesser base area facing away from the holder.
Claim 8
Dependent Claim
47 words
An arrangement as claimed in claim 2, the holes or concavities being arranged in projections attached to the holder, characterized in that the projections consist of studs with a central hole enlarging from the opening towards the body of the holder, preferably shaped as a truncate cone.
Claim 9
Dependent Claim
48 words
An arrangement as claimed in claim 2, the holes or concavities being arranged in projections attached to the holder, characterized in that the projections constitute studs narrowing towards their free ends and that the holes are directed at an oblique angle towards the central axis of the studs.
Claim 10
Dependent Claim
41 words
An arrangement as claimed in claim 2, the holes or concavities being arranged in projections attached to the holder, characterized in that the projections constitute strips anchored in the holder body and provided with through-going holes extending at right angles thereto.
Claim 11
Dependent Claim
79 words
An arrangement as claimed in claim 2, the holes or concavities being arranged in projections attached to the holder, characterized in that the projections consist of strips anchored in the holder body, from the free ends of which extend two tongues commonly converging towards the holder body, said tongues forming between themselves a rataining or inwardly guiding concavity for the flowing excess material and furthermore being provided where so required with through-going holes for receiving excess material flowing thereinto.
Claim 12
Dependent Claim
43 words
An arrangement as claimed in claim 1, characterized in that the holder consists of a frame encircling at least the major portion of the perimeter of the pressed product, the parts of the frame facing said perimeter being provided with the anchoring means.
Claim 13
Dependent Claim
40 words
An arrangement as claimed in claim 4, characterized in that the holes are arranged permanently to retain excess material, solidified therein from press operation to press operation, to be melted at repeated press operations together with excess material flowing thereonto.
Claim 14
Dependent Claim
51 words
An arrangement as claimed in claim 7, characterized in that the anchoring means are arranged in projections having such a design that the excess material advancing during pressing is guided by the contour of said means and after solidification creates extra anchorage for the pressed product in relation to the holder.
Claim 15
Dependent Claim
17 words
An arrangement as claimed in claim 7, characterized in that the projections extend radially from the holder.
Claim 16
Dependent Claim
17 words
An arrangement as claimed in claim 14, characterized in that the holes extend radially through the projections.
Claim 17
Dependent Claim
24 words
An arrangement as claimed in claim 14, characterized in that the holes extend at right angles to the general axial direction of the projections.
Claim 18
Dependent Claim
43 words
An arrangement as claimed in claim 1, characterized in that the holder is guided for carrying out translatory movements between its positions in the pressing area and the apparatus for breaking the ready-pressed product away from the holder, situated outside the pressing zone.
Claim 19
Dependent Claim
47 words
An arrangement as claimed in claim 1, characterized in that the holder is pivotally mounted for carrying out swinging movements between its position in the pressing area and its position in the apparatus for breaking the ready-pressed product away from the holder, situated outside the pressing zone.
Claim 20
Dependent Claim
33 words
An arrangement in a moulding press of column type, preferably of the three-column type according to claim 18, characterized in that the holder is pivotally mounted about one of the mounding press columns.
Claim 21
Dependent Claim
77 words
An arrangement as claimed in claim 11, characterized in that the frame is broken in one place to provide an opening which is sufficiently large and so placed as to enable the frame to be introduced into its position in the pressing area past a cake of plastic material from which the product is to be press-moulded and which is placed in the plane of movement of the frame between the tool halves of the moulding press.
References Cited (Backward Citations)
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Cited
US3186029A
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US3528127A
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US3635622A
Cited
US3526690A
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US3663136A
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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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |