Patent GB-406881-A (GB)
Title: Method of, and machine for, the manufacture of bon-bons
IPC: A23G7/00
Filed: 1933-04-24
Abstract: 406,881. Crimping paper. STELLING, F. R., 116, Wellington Street, Waterloo, New South Wales, Australia. April 24, 1933, No. 11929. Convention date, May 2, 1932. [Class 141.] In the manufacture of bon-bon crackers, the crimping of the sheath at each end of the body is performed by an iris diaphragm surrounding the partially formed cracker and adapted to be closed thereon. A machine for carrying the invention into effect comprises two axially aligned and spaced mandrels around which the sheath enclosing the body is formed, the crimping device which is in the form of two axially aligned turrets carrying the iris diaphragms and surrounding the mandrels, power driven means for moving in timed sequence, the mandrels and crimping turrets axially into and out of operative position and operating the crimping diaphragms, and ejector means for delivering the finished product. Fig. 2 shows the machine in which a channelled support M is supplied with one or more sheets of paper and the cracker body 106, and is moved upwardly by treadle-gear to coact with the axially spaced mandrels 16 in the formation of the sheath. The plate M is then withdrawn and a pover-driven shaft J put in motion by a clutch 21. The shaft carries two similar cam discs 24 which first move the crimping turrets H axially over the mandrels till they overtie the spaces between the body 106 and the mandrels, operate the iris diaphragm carried by the turrets and then withdraw the turrets to their inoperative position. The crimping device is shown in section in Fig. 7 and consists of a number of overlapping plates 60 pivoted at one end to the non-rotatable part of the turret and at the other end pivoted to a ring 54 which is rotated relatively to the turret by an arm 55 actuated by the rod 65, and pins 74 thereon. The rod 65 is operated through linkwork from the cam-wheels 24. The diaphragm is mounted on a non-rotatable piston axially slidable in the turret, and, during the contraction of the diaphragm, is given a slight axial movement against the action of a spring by the contact between inclined cams on the rotatable ring 54 and the turret, to avoid tearing the paper. During the opening of the diaphragm, the return movement of the piston is prevented by a spring detent which is released by a cam on the ring 54 at the end of the opening movement. During the inward movement of the crimping turrets, a gripper comprising a main arm 85 Fig. 8 and jaw 86, with an auxiliary arm and jaw 100 pivoted thereto and connected by an over-centre spring is allowed to fall so that the jaw 86 lies over the cracker and the jaw 100 is caused to close on the underside thereof by an inclined rod 109 on one of the turrets. The mandrels 16 which are carried by levers 35 are normally held in their operative inner positions by toggle links 34 and an upwardly spring-pressed rod 32. At the end of the crimping operation, a cam 28 on shaft J comes into operation to depress the rod 32 and withdraw the mandrels whereupon the gripper falls and is opened by the engagement of the arm 100 with a fixed contact 103 to release the finished cracker. Further rotation of the shaft J resets the gripper in its raised position and allows the mandrels to return under spring action to their operative position whereupon the clutch 21 is thrown out. To prevent vacuum effects on the withdrawal of the mandrels from the cracker ends, the mandrels 16 and their spindles D, Fig. 10 are made hollow and carry a rod 78 with a bevelled head 79 which is held in a seating 80 by a tension spring 84. A pivoted latch 82 on the rod projects through a slot 83 in the spindle D and, in the forward position of the mandrel, abuts against a fixed bearing C. The rod is thus held back during the withdrawing movement of the mandrel, until the end of the slot 83 turns the latch inwards and releases it.