http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2469689-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5d9f3ca41550d315642580237250c5b0 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05K2203-1572 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05K3-202 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/H05K3-062 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F7-2022 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03F1-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C25D1-08 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05K3-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C25D1-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/H05K3-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F7-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03F1-20 |
| filingDate | 1945-03-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1949-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3e808d1fa46a9a4c66cb7b6f70fe957e |
| publicationDate | 1949-05-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2469689-A |
| titleOfInvention | Method of making apertured metal sheets |
| abstract | 586,003. Etching. KODAK, Ltd., and GRESHAM, D. C. March 25, 1944, No. 5569. [Class 100 (ii)] [Also in Groups XX and XXXVI] Apertured diaphragms comprising a preferably metal foil on a sheet metal base are made by forming stencils on both sides of the base where the holes are required, depositing the foil on the parts not covered by the stencils, removing the latter, and electrolytically or chemically etching the base until the desired holes are formed. The foil may be of nickel and the base of copper. Chemical etching can be effected by ferric chloride solution or dilute nitric acid. The stencil is preferably applied photographically using gum bichromate or silver salt emulsion, or the process of Specification 573,798, [Group XX], the apertures in the positives on both sides of the base being in register and that on the reverse side is made larger. Fig. 4D shows a configuration of slotted graticule forming one of several produced simultaneously on a single sheet by the following method. Slot 26 is drawn as a thick black line on a white lacquered metal background 25 on which the perimeter 27 is also represented as a black line, a reduced positive is made, and from it two negative contact prints are obtained, one, the wide-slot negative, having its slot extended by Indian ink and its perimeter 27 " perforated " with white ink, and then both negatives are photographed to give two accurate final-size positives. One positive is reversed to give a mirror-image, and a sheet of several images of both positives is obtained by a step-and-repeat camera, positive. glass transparencies being made therefrom. The sheets containing the two sets of positives are then registered and the rim 17, 171 of the narrowslot one 12 is detached and glued in place on the wide slot one 13 so as to form a frame, Fig. 5C, in which the chemically-cleaned copper base 16 is inserted between the two positives, the copper plate being previously given on both faces, a layer of resin covered by a sensitized layer, particulars of which are given. Both faces are then exposed to light, the sensitized layer and resin are treated with water and lactic acid to-remove all but the resin stencils, and the plate anodically cleaned, particulars of these processes also being given. A nickel foil layer is then electrolytically deposited, the resin stencil is removed, and copper base etched anodically to make the apertures. Particulars of these processes also are given. The perforations between the graticules enable their easy removal from the sheet individually. The formation of the negatives on the copper is effected in a vacuum frame, Fig. 5B, comprising frames 18, 18<1> hinged together, frame 181 carrying a rubber bead 21 stuck to a rubber apron 22 on which a celluloseacetate sheet 23 is stuck, this sheet together with a glass sheet 20 on frame 18 constituting a sealed enclosure which can be exhausted by means of a tube 24. Specification 585,035, [Group XX], also is referred to. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3149059-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3192136-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3423261-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4033831-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3449221-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4341603-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5792180-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5057401-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3186883-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5762811-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2946915-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3483108-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-8201085-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3355369-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3359192-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3139392-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3155460-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3174920-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5693454-A |
| priorityDate | 1944-03-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 73.