Apparatus for steam pressing compressible mat material
Patent 4850849 Issued on July 25, 1989. Estimated Expiration Date: 
April 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
April 29, 2008. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3230237 3891738 Method and apparatus for consolidating particle board Method of pressing reconstituted lignocellulosic materials Forming apparatus Pressing process for composite wood panels Patent #: 4517147 InventorAssigneeApplicationNo. 07/188037 filed on 04/29/1988US Classes:425/407, Including both heating and cooling means264/101, VACUUM TREATMENT OF WORK264/109, FORMING ARTICLES BY UNITING RANDOMLY ASSOCIATED PARTICLES264/83, Work is organic material425/384, Including both heating and cooling means425/406, PRESS FORMING APPARATUS HAVING OPPOSED PRESS MEMBERS425/411Opposed press shaping members insertable between opposed pressure applying meansExaminersPrimary: Silbaugh, Jan H.Assistant: Fertig, Mary Lynn Attorney, Agent or FirmInternational ClassB27N 3/08 (20060101)AbstractA press apparatus and method for steam pressing a mat of compressible material and a binder into a formed product and has particular application to the steam pressing of lignocellulosic material and a binder to form composite board and includes a border projection means generally configured to the outline of the end product to be produced and which is carried by a press platen, preferably the upper press platen, and which is intended to impinge into the mat during its compression and to effect a steam pressure seal at the impingement area of the mat. As a pressure seal of the compressed mat is created about the mat edges, steam can then be passed through the mat in order to cure the binder. If desired, cool air can be passed through the mat afer steaming to condense residual steam in the mat. The compressed mat after steaming, can also be subject to vacuum prior to releasing it from the press. The edges of the cured mat which have been subject to impingement, can subsequently be trimmed off.Field of SearchPRESS FORMING APPARATUS HAVING OPPOSED PRESS MEMBERSIncluding both heating and cooling means MEANS TO CREATE A VACUUM OR APPLY FLUID PRESSURE WITHIN A PRESS FORMING MOLD Including both heating and cooling means Including shaping means comprising fluid pressure contacting work directly Vacuum or suction means INCLUDING HANDLING MEANS OR FEATURE FOR TREATING LIQUID OR VEHICLE LIQUID, OR CONDENSATE Periphery of female mold limiting the movement of a dynamic press member Opposed press shaping members insertable between opposed pressure applying means | |
