GB460492A - Improvements in filling and weighing machines - Google Patents

Abstract

460,492. Hoppers ; filling and weighing apparatus. DUBOIS, A. June 23, 1936, No. 17411. Convention date, June 24, 1935. [Class 78 (i)] [Also in Groups XVII and XVIII] A hopper &c. has a bottom spout &c. comprising a tubular and substantially rectilinear part 23 inclined from the vertical and extended by a forwardly projecting prong 24 the upper face of which is less inclined than the tubular part 23 in order to enter the valve of a valve bag and thereby assist in supporting same. The prong 24 leaves the discharge opening of the tubular part 23 free to allow of a straight path discharge from the hopper to the bag. The hopper 13 is vibrated to facilitate sliding of the material, and for this purpose is formed with a double wall, the walls being connected at the top and preferably spaced apart near the bottom by a pneumatic cushion 13a. The vibrator 15 is attached to the outer wall, and the whole of the hopper is supported by a pneumatic rubber chamber 17 on a concave member 18 pivoted to a frame 11, 12 about coaxial horizontal shafts 20. The hopper rests on the chamber 17 by a concave flange 16 which overlaps the member 18 and prevents material falling therein. Rigidly fixed to the hopper is a bag-carrying frame 14. The hopper when the bag is empty turns by its weight about the shafts 20 in the direction indicated by the arrow f, but as the bag fills it tips the other way till brought up by a spring-pressed pivoted stop 25 engaging a projection 29 on the hopper. The stop 25, which may be adjustable, can be manually released by a bar 27, and the hopper may be further tipped by a handle 31. The hopper may be cut away at its side to facilitate filling by hand-shovel. The whole of the hopper, bag-carrying frame, and bag is mounted on a weighing machine which consists of two parallel horizontal bars 2 carried by knifeedges giving a transverse swing. Two bars 4, 5, located in a common transverse plane and turned toward each other are carried rigidly each by one of the bars 2. A bracket 6 connects the bars 4, 5 by knife-edges. Two shorter transverse levers are carried by the other ends of the bars 2. A rod connects the free end of the lever 4 to a scale-beam. The frame 11, 12 rides on the levers carried by the bars 2. Hooks &c. 30 are provided on the hopper for the attachment of different counterweights. The apparatus may be made portable by providing wheels 32.