(19) |
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(11) |
EP 0 502 734 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
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03.02.1993 Bulletin 1993/05 |
(43) |
Date of publication A2: |
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09.09.1992 Bulletin 1992/37 |
(22) |
Date of filing: 05.03.1992 |
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(51) |
International Patent Classification (IPC)5: B30B 11/08 |
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(84) |
Designated Contracting States: |
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BE DE ES FR GB IT |
(30) |
Priority: |
06.03.1991 GB 9104720
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(71) |
Applicant: MANESTY MACHINES LIMITED |
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Liverpool L24 9LQ (GB) |
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(72) |
Inventor: |
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- Wilson, David Henry
Hunts Cross, Liverpool, L25 0LS (GB)
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(74) |
Representative: Cardwell, Stuart Martin et al |
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Roystons
Tower Building
Water Street Liverpool L3 1BA Liverpool L3 1BA (GB) |
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(57) In a tabletting press comprising a turret (2) rotatable with respect to a housing
(1) and carrying rotatably with it a plurality of dies and a plurality of opposed
pairs of punches (3; 3', 3") and a pair of rotatable pressure rolls (7; 7', 7") between
which the opposed punches are passed to form tablets in successive dies, and respective
curves (5 ; 5', 5") mounted, in use, non-rotatably with respect to the housing to
control movement of the opposed pair of punches in less heavily loaded sectors of
the tabletting cycle outside the influence of the compression rolls, an improved compression
profile is achieved by interposing between at least one of the compression rolls and
heads of associated punches under its influence a rotatable disc (11 ; 11', 11) one
surface (15) of which is acted on by the associated compression roll and the other
surface (17) of which contacts the heads of the punches to control the compression
profile of the punches outside of the influence of the fixed curves. Conveniently
the disc has an axis of rotation inclined with respect to the axis of the punches.
