http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-734180-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_9571e2a850b5408b6df9cfb9682bc4a4 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G10C3-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G10C3-10 |
| filingDate | 1953-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f989f7145dd6e7bcbb99e7f891f039b0 |
| publicationDate | 1955-07-27-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-734180-A |
| titleOfInvention | Pin block and process of producing it |
| abstract | 734,180. Pianofortes. BALDWIN CO. Dec. 15, 1953, No. 34941/53. Class 88 (2). [Also in Group XXIII] A wrest plank for a piano is made of crossgrained resin-bonded plies of hard wood such as sugar maple, the thickness of the plies being in the range 1/8 to 1/28 inch. The ratio of hole diameter to pin diameter is between 0.925 and 0.96. The resin is preferably chosen and applied so that the plywood has a specific gravity between 0.72 and 0.87. The plywood may be either hot pressed or cold pressed. The resin used for hot pressing may be a thermosetting phenol-formaldehyde resin condensate carried to the point of an A stage resin, a urea formaldehyde resin or a resin of the acrylonitrile or melamine type. For cold pressing, condensation products of resorcinol and formaldehyde may be used with a catalyst, if necessary. In one example, two separate sets of 19 plies of 1/28 inch sugar maple are cooled with adhesive and pressed between platens heated to 300- 310‹ F. for 25 minutes. After cooling, the two structures are bonded together by inserting between them one 1/28 inch ply of the maple coated with a resorcinol-formaldehyde adhesive and a catalyst. The plywood is left to set and then cut to shape. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2009091412-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7518046-B1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-7759565-B2 |
| priorityDate | 1953-12-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.