A combinational weighing system including a plurality of weighing machines each comprising a weighing hopper (20) and an associated hopper module (22) arranged to provide a measurement of the weight of the contents of the associated hopper (20); a plurality of channels (14) via which articles are respectively fed from a common source (17) directly into each of the hoppers (20); a central control (76) for utilizing the weight measurements provided by the hopper modules (22) to select from the hoppers (20) a number of hoppers (20) whose contents have a total weight substantially equal to a target weight; and the selected number of hoppers (20) discharging into a collection chute (24) to feed a batch of articles of substantially the target weight to a collection point.
In a combination weighing apparatus, a plurality of feeders supply a subject to be weighed. A plurality of weighing hoppers receive the subject to be weighed which is supplied by a plurality of feeders. A plurality of weighing devices weigh the subject to be weighed which is received in each of the weighing hoppers. A plurality of weighing devices are fixed to the weighing base. Stands are provided in a circumferential direction at a predetermined interval, the stands respectively have leg portions standing up from a placing surface and supporting portions including horizontal portions connected to the leg portions, and the horizontal portions of the supporting portions are constituted by a plurality of metal supporting columns connected to each other in center portions. The weighing base is directly fixed to a lower surface of the center connecting portions of the stands.
An electrophotographic photoreceptor comprising a support having provided thereon at least one photoconductive layer containing at least inorganic photoconductive particles and a binder resin is disclosed, wherein said binder resin comprises (A) at least one resin having a weight average molecular weight of from 1.times.10.sup.3 to 2.times.10.sup.4 and comprising not less than 30% by weight of at least one repeating unit (a-i) represented by formula (I) or (II): ##STR1## wherein X.sub.1 and X.sub.2 each represents a hydrogen atom, a hydrocarbon group having from 1 to 10 carbon atoms, a chlorine atom, a bromine atom, --COY.sub.1 or --COOY.sub.2, wherein Y.sub.1 and Y.sub.2 each represents a hydrocarbon group having from 1 to 10 carbon atoms, provided that both X.sub.1 and X.sub.2 do not simultaneously represent a hydrogen atom; and W.sub.1 and W.sub.2 each represents a mere bond or a linking group containing from 1 to 4 linking atoms which connects --COO-- and the benzene ring, and from 0.5 to 15% by weight of at least one repeating unit (a-ii) containing at least one acidic group selected from --PO.sub.3 H.sub.2, --SO.sub.3 H, --COOH, ##STR2## wherein R represents a hydrocarbon group or --OR' (R' represents a hydrocarbon group having from 1 to 22 carbon atoms), and a cyclic acid anhydride-containing group.
