Patent GB-295271-A (GB)
IPC: B65B1/18
Filed: 1928-04-11
Abstract: 295,271. Bates Valve Bag Corporation, (Assignees of Peterson, W. R.). Aug. 8, 1927, [Convention date]. Filling materials into bags. - A filling and weighing apparatus particularly for use in filling valve bags comprises a lever for moving a spring- closed feed gate into the open position and adapted to engage a pivoted latch near its pivot, the latch being normally held in a substantially vertical position while the gate is open and being tripped by a downward movement of the container support. Mechanical means are provided for automatically forcing the container or bag from the filling spout and tipping it off its support when it has been filled. To commence a filling and weighing operation, the operator after placing the valve of a valve bag over a filling spout 12 carried by an A-shaped frame 17 mounted on the weighbeam 14, lowers a starting handle 96 thereby throwing a spring-pressed hook 93, Fig. 1, into engagement with a main feed gate lever 31, Fig. 3, mounted on a pivot 32. The hook is reciprocated vertically from a power-driven eccentric shaft 13, and on its next upward movement lifts the main gate lever. A sliding feed gate 28 attached to the main gate lever is thus raised and permits the material to pass through the spout 12 into the bag. The main gate lever, in rising, also permits a bag-gripping member 84 to fall and clamp the bag on the feed spout, raises an auxiliary gate lever 45 by means of an abutment 101, and raises the starting handle 96 again. The starting handle, in rising, throws the hook 93 out of action. In the raised positions the gate levers 31, 45 are retained by tripping latches 36, 47 the long arms of which are retained in a vertical position by horizontal retaining- latches 40, 49 pivoted on a pin 41. When the weight of the bag, together with a pick-up weight 26, overcomes the counterweights on the scale beam, the A-frame descends and the pick-up weight is deposited on a fixed bracket 23; a set screw 44 on the A-frame depresses the retaining latch 40 and liberates the tripping latch 36 which in turn frees the main gate lever 31. The main gate lever falls until stopped by contact with the auxiliary lever, and allows the feed gate 28 partially to close the feed orifice under spring action. When the weight is made up, a second set screw 52 similarly liberates the auxiliary feed gate lever and completes the cut off. During this final movement a member 83 on the main gate lever displaces a catch 77 from beneath a locking member 76 and allows a pawl 70 pivoted on an arm 65 to swing into the path of a lifting lug 72 carried by a constantly-oscillated rock shaft 66. On the next upward oscillation, the lifting lug engages the pawl 70 and raises a link 62 connected by a lug 61 to a bag-discharging frame 58, 59 pivoted on a pin 60 on the A-frame. The discharging frame is thus tilted to force the bag off the feed spout 12 and at the same time a roller 63 on a link 62 tilts the bottom support 56 about a pivot 57 and the bag is discharged from the machine. The A-frame, is arranged to have a tendency to move outwardly at the upper end, this tendency being checked by a link 18. In a modification, the auxiliary weight 26 and the auxiliary gate levr 45 are omitted.