H - Electricity – 01 – J
Patent
H - Electricity
01
J
316/12
H01J 9/00 (2006.01) B21D 22/10 (2006.01) H01J 9/14 (2006.01)
Patent
CA 2000059
"Method and device for forming a sheet-metal blank in particular for making a cathode tube mask, and cathode tube mask obtained according to this method" ABSTRACT The present invention relates to a method for forming a sheet-metal blank (1), in particular for making a cathode tube mask, on a press, according to which the peripheral part of the sheet-metal blank (1) is held over a small width in a peripheral member (30), the central part of the sheet-metal blank (1) is formed, according to a given curvature, by deforming the punch (17) and the die (13) through the action of an upper bearing plate (19), a mechanical force is exerted on localized zones of the clamping member (30), moving closer together the opposite elements of the said clamping member, and at the same time the peripheral zone of the sheet-metal blank (1) is applied and unfurled along the side walls of the punch (17) or of the die (13) by a relative movement of the clamping member (30) with respect to the punch (17) or to the die (13) so as to obtain the final flanged edge. The invention also relates to a cathode tube mask made in accordance with this method. Figure 3
Fetherstonhaugh & Co.
Sollac
LandOfFree
Method and device for forming a sheet-metal blank in... 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 and device for forming a sheet-metal blank in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for forming a sheet-metal blank in... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1517350