Patent GB-190618650-A (GB)
Title: Improvements in Machines for Making Receptacles of Compressed Pulp.
Inventor: SCHNEIDER WILLIAM EDWIN
Filed: 1906-08-20
Granted: 1907-01-31
Abstract: 18,650. Schneider, W. E. Aug. 20. Moulding boxes, barrels, &c.-Kegs, barrels, and receptacles specially adapted for containing milk, fruit, vegetables, and the like are moulded from pulp on a collapsible mandrel in a mould with movable side walls. A basket 44, Fig. 1, receiving the moulded receptacle from the collapsed mandrel delivers it down a shoot 47, and the filled bucket 45 turns over on its pivots to deliver its contents to the mould, an extension closing the mouth of the delivery pipe. The mandrel 6 on its rod 7 is then lowered into the mould and expanded, the perforated movable mould sides and bottom are operated to compress the material, the moisture from which passes through the perforations and is drawn off by a pump 3<f>, the walls are retracted, and the receptacle is stripped from the collapsed mandrel as it rises again. The mandrel 6, Fig. 14, carried on a rod 7, consists of four wedge-shaped sections 6<a>, 6<d>, &c. dovetailing into and slidable along intermediate sections 6<e>, 6<f>, 6<h>, &c. Nuts 6
 passing through slots in the cap 6<m> round the top of the mandrel hold the wedge sections but allow them to move radially, and bolts 6w holding a ring 6x pass through vertical s!ots 6<n> and engage the sections 6e, 6<f>, &c. This ring contacts with an annular stop 60, Fig. 1, as the mandrel rises, so that the wedge sections alone can rise further, the mandrel is collapsed, and a spring round the portion of the rod 7 inside the mandrel is compressed. As the mandrel descends, the spring and the wedge sections expand it again. The raising and lowering of the mandrel is effected from the driving-shaft 33 by means of spur gearing 32, 31, mutilated gear-wheels 26, 25, an arm 21, and a yoke 7<a> connecting the arm 21 to the rod 7. The mutilated wheels ensure periods of rest when the mandrel is in the mould. The moulds 4, Fig. 7, are composed of four two-limbed members 4<a>, 4<b> having one limb 4<b> of each member arranged to slide in grooves 4<c> of the adjacent member and, as shown, each has a curved portion 4d to form the contour of the completed mould, which is assembled by means of toggle-arms engaging projecting lugs 4<i>. The mould sides are perforated at 4<e>, Fig. 13, and the bottom at 3<x>, Fig. 24, the perforations communicating with chambers over openings 3<a> in the base-plate 3, so that a vacuum cam be maintained on all sides of the mould and the pulp water drawn off. The arms 59<a>, 59<b>, Fig. 13, of the toggle 59<x> are of special shape, the arms 59<a> having recesses, shown occupied by pins 11<a> on the vertically - reciprocating rods 11, and noses 59<c> fitting into recesses in the arms 59<b>. As the rods 11 descend, the pins 11<a> press against the noses 59<c>, expand the toggles, and complete the moulds ; the upward movement causes the pins to engage the toggle hinge and shut up the arms. To obtain vertical reciprocation and a period of rest for the rods 11, they are connected to a head-plate 10 secured to a hollow screw 19 engaging internal threads on the shaft of an horizontal bevel-wheel 18. The spur-wheel 30 forming part of the main gearing has cam-surfaces 42, 43 on either side, each surface consisting of a high, an intermediate, and a low part arranged in inverse order on the opposite sides. Rollers 41, 41<a> on a swinging rod 40 are engaged by these cam-surfaces so that the rod is first moved in one direction and then in the other, and finally held centrally. Movement of the rod in either direction swings the levers 38, 38<a> and throws in one of the clutches 37, 37<a> so that one or other of the bevel-wheels 17, 17<a> is rotated. The wheel 18 is thus driven first in one direction and then in the other, while a period of rest is provided for. In one modification, in which the mould bottom is normally below the level of the mould, the rods 11 carry collars engaging rollers on the ends of pivoted levers 62, Fig. 1, to push up the mould bottom when required.