Patent GB-316672-A (GB)
Title: Improvements in automatic sacking and weighing machines
IPC: B65B1/18
Filed: 1929-07-31
Abstract: 316,672. Jarrier, R. Aug. 2, 1928, [Convention date]. Packeting granular material into bags.- In a machine of the kind described in Specification 315,939, wherein the bag to be filled is slipped over a leed-tube fixed to the frame of the machine, the bag is held out of contact with the tube by a shield, that is carried by the weigh-platform and is disposed around the upper part of the tube in such a manner as to allow a slight vertical play. A feed-tube 6, Fig. 1, projects from the lower end of a hopper 7 through a valve in the upper part of a bag S that is supported by a truck 2 on a weigh-platform 1<a>. In order that the weight of the bag may be taken wholly by the platform, a shield 33 adjustable on a standard 28 projecting from the platform is interposed between the bag and the upper surface of the tube. The feed means are actuated by an electric motor 5 and may comprise either a blower 80 or an elongated piston slidable within an extension of the feed-tube. A switch-arm 73, Fig. 3, is operated from the weigh-beam 3 to open the motor circuit when sufficient weight of material has been fed into the bag. The arm is returned to restart the motor by depression of a push-button in the circuit of a solenoid 79. Simultaneously with the stopping of the motor, the end 27 of the switch-arm 73 trips a detent 23, Figs. 3 and 4, whereby a spring-actuated feedgate 19 is released and slides into closed position. The material in the hopper is agitated by rods 14 projecting laterally from a member 13 that is reciprocated by a crank 12 driven from the feed motor 5. A modified form of stirring device comprises a number of rods projecting from the upper and lower sides of a horizontal, manually-operable gate that serves to divide the feed hopper into two parts. The truck 2, Fig. 1, comprises a platform 37 that is laterally rockable to discharge a bag S carried by a pan 50. The pan 50 is supported by springs 49 upon a member 48 that is in turn supported upon the platform 37 by springs 47. At the commencement of a weighing operation the member 48 is maintained in its lower position by a catch 51. As the bag fills, the pan 50 descends and forces the catch 51 outwardly until the member 48 is released and rises under the action of the springs 47. The upward movement serves to open out the bag and pack the material therein. The member 48 is returned to its lower position by the manual rotation of two weighted levers 63, 64. The Specification as open to inspection under Sect. 91 (3) (a) comprises also a modification, Fig. 7 (Cancelled), wherein the apparatus is adapted for filling sacks carried by a truck 86 provided with a conical member 84 against the outer surface of which the mouth of a sack is clamped by means of a rubber-lined ring 99 that is movable vertically by a handle 94. The sack is carried on a platform 102 that is guided for vertical movement on the track. The platform is maintained in the position shown during the filling of the sack by means of stops 109. When the sack is full, the platform is raised by depression of a pedal 106, the mouth of the sack is released by an upward movement of the handle 94, the stops 109 are moved to inoperative position by rotation of a handle 114, and the platform is lowered to allow the sack to clear the cone 84. This subject-matter does not appear in the Specification as accepted.