Electric heating – Metal heating – By arc
Patent
1976-02-23
1978-05-09
Reynolds, Bruce A.
Electric heating
Metal heating
By arc
219384, 128260, 206 05, 424 15, B23K 2700
Patent
active
040888649
ABSTRACT:
A high speed process and apparatus are disclosed for forming outlet passageways of accurate, predetermined size in the walls of pills which dispense their contents by osmotically pumping said contents out said outlet passageways. The pills are moved in succession by an indexer past a passageway forming station where the pills are tracked seriatim at the velocity at which they are moving by an optical tracking system focused on the pill wall and into which a laser beam is directed. During the tracking the laser is fired and the laser beam is transmitted by the optical tracking system onto the wall of the moving pill, the laser power, laser beam dimensions and firing duration being such as to cause the laser beam to heat and pierce the pill wall, thereby forming said outlet passageway.
REFERENCES:
patent: 216107 (1879-06-01), Richards
patent: 3404254 (1968-10-01), Jones
patent: 3562377 (1971-02-01), Zetzsche
patent: 3620759 (1971-11-01), Maddox
patent: 3808394 (1974-04-01), Mominee et al.
patent: 3823816 (1974-07-01), Controulis et al.
patent: 3965327 (1976-06-01), Ehlscheid et al.
Precise Perforations Every Time, Silvus et al. 11-1969, Tool & Manufacturing Engineer.
Mefford Wayne S.
Saunders Richard J.
Theeuwes Felix
ALZA Corporation
Ciotti Thomas E.
Mandell Edward L.
Paschall Mark H.
Reynolds Bruce A.
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