Patent US3185336A successfully refreshed from Google Patents.
Patent US3842990A successfully refreshed from Google Patents.
US3842990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for loading a stack of sheets into a platen press
Assignee: G Siempelkamp GmbH and Co KG
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Filing: 1973-02-28
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Granted: 1974-10-22
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Expires: 1993-02-28
Abstract
Abstract A pair of veneers sandwiching a chipboard core between them are gripped at each of their longitudinal edges by a pair of elongated jaws and this stack is then bent into a downwardly concave shape (e.g. of inverted catenary section) and moved into the press. The jaws then pivot downwardly to bend the sandwich into an upwardly concave shape, depositing the sandwich on the lower press platen. Thereupon the jaws are opened and retracted transversely and the sandwich is hot pressed into a hard laminate board. The carriage carrying the jaws also is provided with a plurality of vacuum lifts which pick up and displace the finished laminate board out of the press.
Inventors
- 👤 M Posselt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:12
CPC Classifications
B; B27; B27N; B27N3/00; B27N3/08; B27N3/20; B27N3/22
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
145 words
An apparatus for displacing a stack of at least two sheets from a pickup station in a heated-platen press, said apparatus comprising: a carriage displaceable horizontally between said station and said press; a pAir of jaws on each side of said carriage, said jaws being elongated in the displacement direction of said carriage and dimensioned to extend over substantially the entire lengths of opposite edges of said stack; means for closing said jaws on said opposite edges of said stack; means for displacing said carriage from said station to said press with said jaws closed on said edges; means for displacing said jaws transverse to said displacement direction; a plurality of suction lifters spaced along opposite sides of said carriage downstream of said jaws; and means for swinging said suction lifters on said carriage, said suction lifters advancing said stack after consolidation of said press.
Claim 2
Independent Claim
145 words
An apparatus for displacing a stack of at least two sheets from a pickup station in a heated-platen press, said apparatus comprising: a carriage displaceable horizontally between said station and said press; a pAir of jaws on each side of said carriage, said jaws being elongated in the displacement direction of said carriage and dimensioned to extend over substantially the entire lengths of opposite edges of said stack; means for closing said jaws on said opposite edges of said stack; means for displacing said carriage from said station to said press with said jaws closed on said edges; means for displacing said jaws transverse to said displacement direction; a plurality of suction lifters spaced along opposite sides of said carriage downstream of said jaws; and means for swinging said suction lifters on said carriage, said suction lifters advancing said stack after consolidation of said press.
Claim 3
Dependent Claim
54 words
The apparatus defined in claim 1, further comprising means for pivoting each pair of jaws about a respective axis parallel to said direction from a first position directed generally downwardly prior to closing of said jaws on said edges to a second position directed generally upwardly after closing of said jaws on said edges.
Claim 4
Dependent Claim
22 words
The apparatus defined in claim 1, further comprising a body of elastomeric material on each of said jaws engageable with said stack.
Claim 5
Dependent Claim
16 words
The apparatus defined in claim 1, further comprising means for withdrawing air from each suction lifter.
Claim 6
Dependent Claim
42 words
The apparatus defined in claim 4 wherein each suction lifter further comprises an arm pivoted on said carriage and displaceable between a first position with said arm extending parallel to said direction to a second position with said arm extending transverse thereto.
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) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |