Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1979-07-25
1980-10-07
Tufariello, T. M.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20412965, C25F 302, C25F 314
Patent
active
042266866
ABSTRACT:
Sheet metal plate has grooves formed in a side, by the electro chemical/photo resist method. Holes are formed in the same way, in the groove bottoms and pass through the metal thickness. In order to ensure that the holes have substantially parallel, dimensionally accurate walls, the sheet thickness to hole diameter ratio, is effectively reduced by first forming the holes to half depth in one side of the sheet, then forming grooves in the same side of the sheet in which the half holes are formed, so as to remove the half holes but leave depressions in the groove bottom at the positions where the half holes had been previously formed, then forming the hole proper for the holes by removing the metal from the opposite side of the sheet.
REFERENCES:
patent: 3359192 (1967-12-01), Heinrich
patent: 3471338 (1969-10-01), Trachtenberg
patent: 3738879 (1973-06-01), von Siemens
Rolls-Royce Limited
Tufariello T. M.
LandOfFree
Method of forming a porous sheet does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of forming a porous sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of forming a porous sheet will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-617392