Patent US3752060A successfully refreshed from Google Patents.
US3752060A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for double platen densifying press
Assignee: EW Bliss Co Inc
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Filing: 1972-01-28
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Granted: 1973-08-14
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Expires: 1992-01-28
Abstract
Abstract A method is disclosed for compressing thin, thermoplastic resincoated sheets of fibrous material employing a pair of platen assemblies each comprised of a plurality of platen members between which a plurality of sheets to be compressed are disposed and which are relatively displaceable toward one another to compress the sheet material therebetween. Relative displacement of the platen members to compress the sheet material therebetween is achieved in a press having opposed pressing members between which the platen sets are alternately disposed. The method includes loading sheet material into one of the sets of platen members while the latter set is disposed outside the press and the other set is disposed between the pressing members of the press, simultaneously moving the one set of platen members into the press and between the pressing members thereof and the other set of platen members out of the opposite side of the press, closing the pressing members relative to one another whereby the sheet material in the one platen assembly is compressed into the other platen assembly outside the press, simultaneously transferring the one platen assembly back to its initial position outside the press and moving the other platen assembly which is now loaded into the press, closing the pressing members whereby the sheet material in the other platen assembly is compressed, unloading the compressed sheet material from the one platen assembly, and then loading sheets of material to be compressed into the one platen assembly and repeating the alternate loading, pressing and unloading operations of the two platen assemblies. The method further includes heating the platen members of each of the assemblies during loading thereof to melt the resin with which the fiber material is coated, and cooling the platen members of each assembly during the pressing operation to cure the resin.
Inventors
- 👤 J Hubert
- 👤 B Hook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:30
CPC Classifications
B; B29; B29C; B29C43/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
257 words
A method of compressing sheets of fibrous material between sets of opposed platen members relatively displaceable toward and away from one another comprising: providing a compressing station, establishing a first platen station for one of the sets of platen members and a second platen station for the other of the sets of platen members, loading sheet material between the platen members of the one set at said first station, transferring said one set of platen members to said compressing station, relatively displacing the platen members of said one set at said compressing station to compress the sheet material therebetween, transferring said one set back to said first station, removing the compressed sheet material from between the platen members of said one set at said first station, loading sheet material between the platen members of said other set at said second station, transferring said other set of platen members to said compressing station, relatively displacing the platen members of said other set at said com-pressing station to compress the sheet material therebetween, transferring said other set back to said second station, and removing the compressed sheet material from between the platen members of said other set at said second station, heating the platen members of said one set and said other set at the respective one of said first and second stations prior to transferring said one and said other set from the respective first and second station to said compressing station, and cooling the platEn members of said one and said other set at said compressing station.
Claim 2
Independent Claim
257 words
A method of compressing sheets of fibrous material between sets of opposed platen members relatively displaceable toward and away from one another comprising: providing a compressing station, establishing a first platen station for one of the sets of platen members and a second platen station for the other of the sets of platen members, loading sheet material between the platen members of the one set at said first station, transferring said one set of platen members to said compressing station, relatively displacing the platen members of said one set at said compressing station to compress the sheet material therebetween, transferring said one set back to said first station, removing the compressed sheet material from between the platen members of said one set at said first station, loading sheet material between the platen members of said other set at said second station, transferring said other set of platen members to said compressing station, relatively displacing the platen members of said other set at said com-pressing station to compress the sheet material therebetween, transferring said other set back to said second station, and removing the compressed sheet material from between the platen members of said other set at said second station, heating the platen members of said one set and said other set at the respective one of said first and second stations prior to transferring said one and said other set from the respective first and second station to said compressing station, and cooling the platEn members of said one and said other set at said compressing station.
Claim 3
Dependent Claim
40 words
The method of claim 1, and transferring said other set of platen members from said second station to said compressing station simutaneous with the transfer of said one set of platen members from said compressing station to said first station.
Claim 4
Dependent Claim
25 words
The method of claim 1, and loading said other set of platen members while said one set of platen members is at said compressing station.
Claim 5
Dependent Claim
32 words
The method of claim 3, and removing said compressed sheet material from between the platen members of said one set while said other set of platen members is at said compressing station.
Claim 6
Dependent Claim
38 words
The method of claim 4, and loading sheet material between and removing compressed sheet material from the platen members of each of said one and said other sets along corresponding feed and discharge paths having a common direction.
Claim 7
Dependent Claim
32 words
The method of claim 5, and transferring said one and said other sets of platen members to and from said compressing station along aligned paths on opposite sides of said compressing station.
Claim 8
Dependent Claim
40 words
The method of claim 6, and providing for said feed and discharge paths of each of said one and said other sets of platen members to be generally perpendicular to said aligned paths and in the same direction relative thereto.
Claim 9
Independent Claim
394 words
A method of compressing sheets of fibrous material between sets of opposed platen members relatively displaceable toward and away from one another comprising: providing a compressing station, establishing a first platen station for one of the sets of platen members and a second platen station for the other of the sets of platen members, loading sheet material between the platen members of the one set at said first station, transferring said one set of platen members to said compressing station, relatively displacing the platen members of said one set at said compressing station to compress the sheet material therebetween, transferring said one set back to said first station, removing the compressed sheet material from between the platen members of said one set at said first station, loading sheet material between the platen memers of said other set at said second station, transferring said other set of platen members to said compressing station, relatively displacing the platen members of said other set at said compressing station to compress the sheet material therebetween, transferring said other set back to said second station, removing the compressed sheet material from between the platen members of said other set at said second station, transferring said other set of platen members from said second station to said compressing station simultaneous with the transfer of said one set of platen members from said compressing station to said first station, removing said compressed sheet material from between the platen members of said one set while said other set of platen members is at said compressing station, loading sheet material between and removing compressed sheet material from the platen members of each of said one and said other sets along corresponding feed and discharge paths having a common direction, transferring said one and said other sets of platen members to and from said compressing station along aligned paths on opposite sides of said compressing station, providing for said feed and discharge paths of each of said one and said other sets of platen members to be generally perpendicular to said aligned paths and in the same direction relative thereto, heating the platen members of said one and said other set when said sets are at the respective first and second stations for loading, and cooling the platen members of said one and said other set when said sets are at said compressing station.
Claim 10
Independent Claim
394 words
A method of compressing sheets of fibrous material between sets of opposed platen members relatively displaceable toward and away from one another comprising: providing a compressing station, establishing a first platen station for one of the sets of platen members and a second platen station for the other of the sets of platen members, loading sheet material between the platen members of the one set at said first station, transferring said one set of platen members to said compressing station, relatively displacing the platen members of said one set at said compressing station to compress the sheet material therebetween, transferring said one set back to said first station, removing the compressed sheet material from between the platen members of said one set at said first station, loading sheet material between the platen memers of said other set at said second station, transferring said other set of platen members to said compressing station, relatively displacing the platen members of said other set at said compressing station to compress the sheet material therebetween, transferring said other set back to said second station, removing the compressed sheet material from between the platen members of said other set at said second station, transferring said other set of platen members from said second station to said compressing station simultaneous with the transfer of said one set of platen members from said compressing station to said first station, removing said compressed sheet material from between the platen members of said one set while said other set of platen members is at said compressing station, loading sheet material between and removing compressed sheet material from the platen members of each of said one and said other sets along corresponding feed and discharge paths having a common direction, transferring said one and said other sets of platen members to and from said compressing station along aligned paths on opposite sides of said compressing station, providing for said feed and discharge paths of each of said one and said other sets of platen members to be generally perpendicular to said aligned paths and in the same direction relative thereto, heating the platen members of said one and said other set when said sets are at the respective first and second stations for loading, and cooling the platen members of said one and said other set when said sets are at said compressing station.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |