Tablet press machine

Details Tablet press machine Tablet press machine

2006-12-26

2006-12-26

Gupta, Yogendra N. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

With means lubricating cooperating apparatus parts

C425S345000, C425S34800S, C425S215000

Reexamination Certificate

active

07153118

ABSTRACT:
A tablet press machine (100) comprises: a hopper (1) for feeding a powder or granular product (2) to a first disc (3a) that rotates about an axis (X) and is equipped with evenly distributed holes or dies (3); a second and third disc (4, 6) that are positioned above and below the first disc (3a), respectively, rotate about the axis (X) and support respective pluralities of upper and lower reciprocating punches (5,7). The punches (5, 7) are driven towards and away from each other when they are aligned with the dies (3) in such a way as to compress the product (2). Each of the punches (5, 7) comprises a cylindrical shank (8), one end of which is equipped with a working head (10) and sealed protection means (11) acting on the cylindrical shank (8) itself. The sealed protection means (11) comprise, for each punch (5, 7), a concertinaed sleeve (12) covering the cylindrical shank (8) and having an annular portion (13) constituting its far end relative to the working head (10), forming an annular seal and providing also a removable element used to attach support means (14) that protrude from the respective disc (4, 6). The near end (15) of each concertinaed sleeve (12) relative to the working head (10) presents an enlarged annular portion (16) that engages with a matching annular groove (17) in the cylindrical shank (8) to provide a tight seal.

REFERENCES:
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patent: 5076343 (1991-12-01), Sandercock
patent: 5462427 (1995-10-01), Kramer
patent: 6482349 (2002-11-01), Kohara et al.
patent: 24 62 102 (1976-01-01), None
patent: 295 16 577 U 1 (1995-12-01), None
patent: 199 63 263 A 1 (2000-09-01), None
patent: 01241396 (1989-09-01), None

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