Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – For press shaping surface
Patent
1983-07-11
1984-12-11
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
For press shaping surface
30367, 83684, 83698, 145 61F, 279 91, 425345, 425352, B26D 726, B26F 114
Patent
active
044875665
ABSTRACT:
A punching tool for use in a tablet making machine includes a body portion having at least one bore extending from an end of the holder a preselected distance into the holder. The bore is internally threaded a preselected depth. An interchangeable punch is threaded into the punch holder bore and extends a selected length from the holder. The end of the punch has an externally threaded portion and a cylindrical portion. The cylindrical portion is positioned between the threaded portion and the portion of the punch that extends outwardly from the holder. The cylindrical portion has a diameter that permits it to move freely without interference into and out of the internally threaded bore. The bore has an enlarged thread configuration provided with cylindrical bearing surfaces between threads. The punch threaded portion has a thread configuration corresponding to the configuration of the threaded bore to permit rapid engagement and disengagement of the punch in the bore. The bearing surfaces of the bore stabilize the punch in the bore to maintain the required length of the punch extending from the holder.
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Heli-Coil Bulletin 900, "Heli-Coil Screw Thread Inserts Design and Production Manual".
Heli-Coil Bulletin 975, "Screw Thread Inserts for Industrial Maintenance, Repair, and Overhaul".
Adams John M.
McBrayer Tinker R.
Price, Jr,. Stanley J.
Woo Jay H.
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