Patent GB-1203522-A (GB)
Title: Machine for boning the forequarters of butcher's meat
IPC: A22C17/00
Filed: 1968-04-03
Abstract: 1,203,522. Boning machines. N SCHLUMBERGER & CIE. 3 April, 1968 [14 April, 1967; 29 Feb., 1968], No. 16125/68. Heading A2U. In using a boning machine, having the constructional features mentioned below and shown in Fig. 1, to remove and separate the meat from the backbone and ribs of a forequarter of meat, the forequarter 3 is placed, with its backbone 9 and ribs 38 facing downwards, on a table 7 on top of a frame 2 fixed to a baseplate 1, and is held on the table by clamping mechanisms including a clamping device 8 (which makes contact with the main part 59 of the meat and is operated by a pneumatic jack 11) and a rib-contacting, ribbed crossmember 91, which is actuated by a pneumatic jack 93. By actuating a pneumatic jack 117, a swingingly mounted, rotating, cylindrical cutter 101, is swung upwardly to erode the backbone 9 and thus remove it, in the form of shavings or bone dust, and liberate the ribs. The cutter 101 and cross-member 91 are then lowered, and a frame 4 provided with pairs of wheels 15 and 17 running on rails 19, is driven, as by an energized electric motor 22 in gear with the wheels 17, towards the frame 2 to bring blades 71 tiltably mounted on a plate structure 34 (which is itself tiltably mounted in the frame 4) and reciprocated longitudinally to and fro with small amplitude, as by eccentric mechanism associated with a rotating shaft 75, and preferably having mutual scissoraction, and a rotating cylindrical cutter 44 mounted on the plate structure 34, into engagement, respectively, with the upper and under sides of the ribs to remove meat from them. The main part 59 of the meat passes over the blades 71 and the ribs 38 pass under them. The ribs are then guided, as by rollers 61, 62, 63 mounted on the plate structure 34, between upper and lower, rotating meat-stripping rollers 48 and 51. Roller 48 is rotatably mounted in the frame-structure 34 and is rotated, by an energized electric motor. Roller 51 is mounted, free to rotate, at one end of a lever 52, which is pivoted, at 53, to the plate-structure 34 and is subjected at its other end, to pressure from a spring 56, so that the roller 51 is resiliently urged upwards. A roller 36 at the lower end of an arm 35 depending from the plate-structure 34 makes contact with the convex upper profile of a cam 37, which is secured to the base-plate 1 and has an upper profile corresponding to that of the ribs of an average forequarter of meat, to control the tilting of the plate-structure 34 and consequentially the positioning of all the above-mentioned tools mounted thereon. In a modified construction of the machine according to the invention, Figs. 18 and 22, the table 7 and its associated clamping mechanisms are pivotally mounted, so that, after the forequarter 3 has been operated on by the rotating cutter 101, the table 7 and its associated clamping mechanisms are swung, through substantially 180 degrees, to bring the forequarter 3 into an inverted position in which it is presented to the tools of the advancing frame 4, which tools are disposed in inverted positions, the cam 37A having a concave upper profile. In another modified construction of a machine, Fig. 13 (not shown) the frame 2 is movable on wheels and the frame 4 is fixedly mounted on the baseplate 1.