Tobacco – Plug or compressed shape making – With cutting
Patent
1990-03-23
1991-05-07
Millin, V.
Tobacco
Plug or compressed shape making
With cutting
131117, 131311, 131322, 83931, A24C 539
Patent
active
050128248
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a rotary drum cutting machine particularly but not exclusively for tobacco or like lamina material.
Examples of such cutting machines are disclosed in United Kingdom Pat. Specifications Nos. 1067448, 1494439, 1498687 and 1498668.
In Patent Specification No. 1498668 there is described an opening and closing mechanism for a tobacco cutting machine, in which a first machine part carries a rotating cutter drum and a second movable part comprises conveyor means for feeding tobacco to said cutter drum to cut the tobacco. The first machine part is capable of effecting a pivoting movement between a closed or operating position where the two parts are closely adjacent each other and an open position.
An object of the invention is to provide a cutter in which the cutter drum is mounted in such a manner that the drum can be moved to a position well clear of the mouth of the compression belts.
Accordingly the present invention provides a rotary drum cutting machine for cutting or shredding lamina material such as tobacco leaf, comprising a support frame, means for compressing and feeding material to be cut, as a plug, to a mouth mounted on the support frame, a cutter carriage movably mounted on a track on the support frame, a cutter drum mounted for rotation on said cutter carriage, and drive means arranged to move the cutter carriage between an open inoperative position with the cutter drum away from the mouth to a closed operative position lo cut or shred material as it issues from the mouth.
Preferably the track is rectilinear and horizontal. Preferably the cutter carriage is movable by means of at least one pneumatic motor which drives a nut located in the carriage and in engagement with a screw threaded rod mounted on the support frame.
According to a further aspect of the invention, a drive belt is provided between a drive pulley on the support frame and a driven pulley mounted on the cutter drum shaft, and tensioning means is provided lo take up any slack in the drive belt when the cutter carriage is moved between the closed and the open positions.
In order to promote a fuller understanding of the above and other aspects of the present invention an embodiment will now be described by way of example only, with reference to the accompanying drawings in which:
FIG. 1 is a side elevation of a tobacco cutting machine with the cutter carriage in a closed operative condition;
FIG. 2 is a side elevation of the machine of FIG. 1 with the carriage in an open position;
FIG. 3 is a schematic representative view of the drive for the cutter and the drive for the cutter carriage of the machine of FIG. 1; and
FIGS. 4A, 4B and 4C show schematically the arrangement of the drive belt for the cutter drum in fully closed, intermediate and fully open positions respectively.
In the tobacco cutting machine shown in the drawings, a supporting frame co comprises a pair of spaced side plates 11 (one only shown) serving to mount bearings for the shafts of the tobacco feed belts 12, 13 which compress the tobacco to be cut and feed it to a mouth 14. A drive mechanism (not shown) for the belts receives power input from an electric motor 15 situated beneath the belts on a base plate 16 of the frame.
A cutter carriage 20 having fabricated end plates 21 carrying between them a cutter drum 22 is arranged for rectilinear movement along a track comprising a pair of rails 23 disposed one on each side of the frame 10. Suitable bearings such as re-circulating idler blocks or bearing rods may be provided as indicated at 23A, between the underside of the carriage 20 and the tracks 23 to reduce friction.
The carriage 20 is movable between a closed position (FIG. 1) and an open (FIG. 2) position by means of a pair of screw jacks comprising screw threaded rods 26 which are fixed at one end (right in FIGS. 1, 2 and 3) to fixed supports (50) on either side of the frame 10 and respectively nuts 27 which are rotatably mounted in respective sides of the cutter carriage 20, screw threaded on the rods 26. The nuts 27 are each in the for
REFERENCES:
patent: 787614 (1905-04-01), Dorsey
patent: 3801024 (1974-04-01), Elsner
patent: 4456018 (1984-06-01), Brackmann et al.
GBE International plc
Millin V.
Reichard Lynne A.
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