US3852012A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously operating panel press
Assignee: Dieffenbacher GmbH Maschinen und Anlagenbau
•
Filing: 1973-08-28
•
Granted: 1974-12-03
•
Expires: 1993-08-28
Abstract
Abstract A continuously operating press for the fabrication of pressed panels in which the press frame carries the upper and lower press spars on cantilever supports so as to give easy access to the conveyors and other maintenance-requiring machine part for convenient removal and replacement.
Inventors
- 👤 H Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:26
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/32; B29C43/44; B29C43/48; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B29C2043/483
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
226 words
A continuously operating press for the fabrication of panels of chips, fibers, plywood and the like, comprising in combination: an open machine frame which includes a base portion, an upper support member and a lower support member, both arranged at a vertical distance from one another and from the base portion; a movable press spar and a stationary press spar facing one another vertically on opposite sides of a horizontal work gap between the support members; one of the spars being mounted underneath the upper support member, the other one being mounted above the lower support member; means for vertically adjusting the movable press spar; and an upper conveyor supported by the spar mounted on the upper support member, and a lower conveyor supported by the spar mounted on the lower support member; and wherein: each conveyor includes an endless conveying element, and conveyor drive means; and the upper conveying element has an outer return strand running above the upper support member and an inner working strand forming the upper side of the work gap, while the lower conveying element has an outer return strand running below the lower support member and an inner working strand forming the lower side of the work gap, both endless conveying elements being removable from their guide drums by laterally sliding them over their respective support members and press spars.
Claim 2
Dependent Claim
226 words
A continuously operating press for the fabrication of panels of chips, fibers, plywood and the like, comprising in combination: an open machine frame which includes a base portion, an upper support member and a lower support member, both arranged at a vertical distance from one another and from the base portion; a movable press spar and a stationary press spar facing one another vertically on opposite sides of a horizontal work gap between the support members; one of the spars being mounted underneath the upper support member, the other one being mounted above the lower support member; means for vertically adjusting the movable press spar; and an upper conveyor supported by the spar mounted on the upper support member, and a lower conveyor supported by the spar mounted on the lower support member; and wherein: each conveyor includes an endless conveying element, and conveyor drive means; and the upper conveying element has an outer return strand running above the upper support member and an inner working strand forming the upper side of the work gap, while the lower conveying element has an outer return strand running below the lower support member and an inner working strand forming the lower side of the work gap, both endless conveying elements being removable from their guide drums by laterally sliding them over their respective support members and press spars.
Claim 3
Dependent Claim
55 words
A panel press as defined in claim 1, wherein: the machine frame further includes a substantially upright back portion which extends upwardly from the base portion; and the upper and lower support members are in the form of cantilever supports extending horizontally and in parallel to one another from the back portion of the frame.
Claim 4
Dependent Claim
39 words
A panel press as defined in claim 2, wherein: the base portion of the machine frame is positioned directly underneath the cantilever support members, so that the machine frame has an overall outline in the shape of an ''''E.''''
Claim 5
Dependent Claim
47 words
A panel press as defined in claim 2, further comprising: at least one generally vertical, easily removable tie member arranged at the open side of the machine frame so as to connect the ends of the cantilever support members, thereby securing them against deflection during press operation.
Claim 6
Dependent Claim
31 words
A panel press as defined in claim 4, wherein: two vertical tie members are arranged in parallel and attached to the cantilever support members by means of studs and wing nuts.
Claim 7
Dependent Claim
19 words
A panel press as defined in claim 1, wherein: the endless conveying elements of the conveyors are steel bands.
Claim 8
Dependent Claim
44 words
A panel press as defined in claim 1, wherein: the movable press spar is mounted from underneath to the upper support member; and the vertical adjusting means includes a plurality of hydraulic cylinders arranged between the upper support member and the movable press spar.
Claim 9
Dependent Claim
49 words
A panel press as defined in claim 1, further comprising: stationary heater pads arranged above and below the work gap immediately behind the inner working strands of the upper and lower cOnveying elements, the heater pads being readily removable and insertable in a lateral direction relative to the conveyors.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |