US4711111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming press mat utilizes trays formed of thin bottom plates and separate annular frames
Assignee: Flow Holdings GmbH SAGL LLC
•
Filing: 1986-05-30
•
Granted: 1987-12-08
•
Expires: 2006-05-30
Abstract
Abstract A press plant with a forming press of the pressure cell type for enhancing the forming space of the press, especially with regard to depth, which is accomplished according to the invention in that the tray has a planar bottom plate with a detachable tray frame resting thereon, the axial loads induced by the working pressure on the short ends of the tray frame in this manner being absorbed by an annular frame or the like, whereby the forming space of the inventive press plate will not be restricted by working pressure dependent dimensioning factors.
Inventors
- 👤 Keijo Hellgren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 07:31
CPC Classifications
B; B21; B21D; B21D22/00; B21D22/10; B21D22/12; B30; B30B; B30B15/00; B30B15/30; B30B5/00; B30B5/02; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
281 words
An apparatus for pressing work pieces, said apparatus comprising a forming press of a pressure cell type, said forming press including a press stand having an upper force-absorbing element, a lower force-absorbing element, a press plate having channels for a pressure medium positioned between said upper and lower force-absorbing plates, and a diaphragm positioned between said press plate and said lower force-absorbing element, said diaphragm and said lower force-absorbing element providing a parallelepipedical working space therebetween which has opposite ends that are open, a tray for carrying forming tools and work pieces into and out of said working space, said tray consisting of a thin bottom plate and a rectangular frame resting on said bottom plate, said frame having thin long sides and thick short ends, said thick short ends acting to close said open ends of said working space when said tray is located in said working space, transport means for horizontally moving said tray into and out of said working space through the open ends thereof, and load-absorbing means located outside of said press stand and movable from a first position wherein it blocks at least one of the open ends of said working space to absorb an axial load induced on the short ends of the rectangular frame of said tray when said tray is located in said working space and the diaphragm of said press stand is moved toward said lower force-absorbing element by pressure medium passing through the channels in said press plate, or to a second position wherein it allows full access to the open ends of said working space to enable said tray to be moved into or moved out of said working space.
Claim 2
Independent Claim
281 words
An apparatus for pressing work pieces, said apparatus comprising a forming press of a pressure cell type, said forming press including a press stand having an upper force-absorbing element, a lower force-absorbing element, a press plate having channels for a pressure medium positioned between said upper and lower force-absorbing plates, and a diaphragm positioned between said press plate and said lower force-absorbing element, said diaphragm and said lower force-absorbing element providing a parallelepipedical working space therebetween which has opposite ends that are open, a tray for carrying forming tools and work pieces into and out of said working space, said tray consisting of a thin bottom plate and a rectangular frame resting on said bottom plate, said frame having thin long sides and thick short ends, said thick short ends acting to close said open ends of said working space when said tray is located in said working space, transport means for horizontally moving said tray into and out of said working space through the open ends thereof, and load-absorbing means located outside of said press stand and movable from a first position wherein it blocks at least one of the open ends of said working space to absorb an axial load induced on the short ends of the rectangular frame of said tray when said tray is located in said working space and the diaphragm of said press stand is moved toward said lower force-absorbing element by pressure medium passing through the channels in said press plate, or to a second position wherein it allows full access to the open ends of said working space to enable said tray to be moved into or moved out of said working space.
Claim 3
Dependent Claim
26 words
An apparatus as defined in claim 1, wherein said load-absorbing means comprises a horizontal annular frame which is vertically movable between said first and second positions.
Claim 4
Dependent Claim
28 words
An apparatus as defined in claim 1, wherein the rectangular frame of said tray includes a protective pad connected between upper edges of the thick short ends thereof.
Claim 5
Dependent Claim
119 words
An apparatus as defined in claim 1, wherein one of said open ends of said working space on said press stand is an inlet end and the other is an outlet end, and wherein said transport means including a first displacement device located near said inlet end of said working space and a second displacement device located near said outlet end of said working space, said first displacement device being capable of lowering said rectangular frame onto said bottom plate to provide said tray ready for movement into said working space, and said second displacement device being capable of raising said rectangular frame away from said bottom plate after said tray has been moved out of said working space.
References Cited (Backward Citations)
US2771850A
Cited
US2962994A
Cited
US2854940A
Cited
US3120205A
Cited
US3391559A
Cited
US3550190A
Cited
US4155476A
Cited
SE440995B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |