Patent GB-732153-A (GB)
Title: Improvements in machines for assembling biscuits, wafers or the like for sandwiches
IPC: A23G9/28
Filed: 1953-02-10
Abstract: 732,153. Packaging-machines. BADNER, R. W. Feb. 10, 1953, No. 3763/53. Class 94 (1). [Also in Group VI] A machine for forming a paper or like supporting frame to hold biscuits spaced to receive between them a layer, e.g. of ice cream, comprises means for forming a strip of paper or the like into three walls of a rectangular box and means for bending or crimping the edges of the facing walls in another direction so as to form flanges to hold the biscuits. A base 10 carries frames 45 and supports an electric motor 12 which, through speed reducer 15, drives an axle 17 having keyed on it a crank arm 18. Ratchet arm 19, which has a peg 20 engaging in a V- shaped opening in arm 18, carries gear teeth 20a engaging a gear 21 freely mounted on a shaft 79. Gear 21 carries a collar 22, Fig. 5, having a step-down shoulder 23 to engage a spring biased pawl 24 journaled in a housing 25 secured to a gear 26 keyed to shaft 79. Thus when gear 21 is rotated clockwise, Fig. 1, by arm 19, shoulder 23 engages pawl 24 and rotates gear 26 but as arm 19 returns and gear 21 is rotated anticlockwise, Fig. 1, the pawl 24 will slide round collar 22 and gear 26 will be at rest. Also keyed to shaft 79 is a cutter wheel 38, having cutter bars which cooperates with a wheel 39 keyed on a shaft 79a carrying a gear 26a which engages gear 26. Gears 29, 36 keyed respectively to shafts 79, 79a carry sprocket chains 30, 32 to drive gears 31, 33 keyed on shafts 34, 141 which carry co-operating wheels 35, 37. Paper strip 71 is unwound under tension from a roll and is forwarded and cut for crimping by wheels 38, 39, crimped and then forwarded, the forwarding taking place intermittently. Peg 20 extends through ratchet arm 19 into a spoke 40 keyed on a shaft 47 so as to rotate the latter. Cam 48, Fig. 4, keyed to shaft 47, rides on a wheel 49 journalled to an axle 50 mounted in side supports 51, 52, which engage a plate 53 sliding on rods 56 mounted on a plate 55, plates 53, 55, being held apart by compression springs 54. Mounted beneath plate 53 are wear plates 58, strip guide 60 and clamps 67, Fig. 4, so that as cam 48 rotates and presses down wheel 49 and hence plate 53 these parts co-operate to crimp the part of strip 71 which is resting on guide 60. As shown, the centre part of the length of strip is crimped differently from the end parts. The crimping takes place when strip 71 is stationary. A T-shaped bar 42 is pivoted to one of the frames 45, Fig. 1, and has, at one end, a roller wheel 41 to engage spoke 40 and at its other end operates cutter bar 46, against a spring 42a, to cause a blade to sever the paper strip into suitable lengths after cutting and folding. Before severing, the prepared piece of paper strip is fed under a plunger 82 so that the centre portion of the strip is under the plunger. Wafers 80, 81 are gravity fed down shoots 109 to either side of the plunger, where they are held by spring biased fingers 84. After the severing of the strip, the plunger moves down ward through a supporting base 83 to deposit the wafers and piece of strip in a paper bag. Plunger 82 is reciprocated by a linkage operated from shaft 47. A plate 84b clamped to base 83 carries a plate 86 with two housings 87 in which are mounted U-shaped lever arms 88, 92, 92a, the last being spring biased, which support fingers 89 whose ends carry channel bars 90. Pressure arms 94 are secured to housings 82 and biased away therefrom by springs 96. Bags 117 are held in a shoot 110 having two side walls secured to plate 86. The bags are held by a clip 115 which engages the longer rear wall 116 of each bag, Fig. 18. A vacuum cup 121 engages the front wall 118 to open the bag and hold it until the wafers 80, 81 and strip 71 have been inserted when the bag is held between bars 90 and arms 94. Vacuum cup 121 has nozzles 122, Fig. 11, connected to a vacuum pump and is swingable on plates 128, 129 which engage a block 127 and a rod 133. As the plunger is depressed, it engages shoulders 142 on members 89 which force the bars 90 back to hold bag 117 against arms 94 until the wafers 80, 81 and strip 71 have been inserted. Then the bag is dropped on to a conveyer 143. In a modification, Fig. 21 (not shown), a rectangular sleeve, e.g. of stiff paper, is used instead of a paper bag.