Patent GB-192308-A (GB)
Title: Improvements in machines for coating wafers and for making sandwich wafers
IPC: A21C15/02
Filed: 1922-03-08
Abstract: 192,308. Salerno, F. G. March 8, 1922. Coating bakers' goods. -In a machine for making sandwich cakes, wafers &c., cakes are passed beneath two hoppers, the first of which applies a. relatively thick plastic confection and the second a less thick confection. and from thence to a magazine which applies the cover cakes. The cakes are led in transverse rows from a magazine 45, by a pusher 48, on to an intermittently moving belt. 25 which, with the aid of an aligning frame, positions them, at rest, beneath stencil plates 56, 56<a> through which the plastic confection is supplied from the front and rear hoppers, and also beneath a, row of pressers 159 which press down the cover cakes supplied by a pusher 143 from the magazine 142. The upper reach of the belt 25 passes over supporting tables 40, 41, 42 between which are arranged cushions 119 connected. with mechanism for rais. ing the belt 25 and the cakes thereon against the stencil plates during the coating operation, and knock-out pins 98 are attached to each hopper to force the coated cakes away from the stencil plates. The front hopper is hot water jacketed and is provided with rollers 63 and oscillating feed plates 64 for forcing the thicker confection through the stencil plate. Both hoppers are provided with inclined spreader walls adjacent to a restricted throat and reciprocate over their respective stencil plates and are connected by side bars 65. The various parts of the machine are arranged and operated as follows. The shaft 22 is driven by a motor through a variable speed device, chains and sprockets 15, 16, 17, 18, 19, 20, 21 and imparts a regularly varying speed to a shaft 23 by means of an eccentric pinion 22<a> and oval pinion 23<a>, the latter having twice as many teeth as the former. The belt drum 24<a> is driven by a pawl and ratchet 34, 35 driven by a crank disc 28 on the shaft 22. and intermediate connecting rods 29, 31 and oscillating frame 30, the pivot block 32 being adjustable, to vary the throw of the ratchet, by a screw 32a. Similar mechanism 36, 37. 38, 39 operates the drum 9 of the delivery belt 8. The cake magazines 45, 142 are removable as units and each comprises a of holders, adapted to receive the cakes in vertical stacks, the front sides of the holders being cut away. The magazine 45 is adjustably supported by posts 45<b> above a table 46 over which work, the pusher 48 which has a notched edge to align the cakes, a single row being ejected by each stroke. The pusher 48 is reciprocated by an eccentric 49 on the shaft 22, Fig. 1, through a rod 50 and lever 51 on the shaft 52. The levers 53 are connected by a pivoted member 53<a> which accommodates the adjusting screw 53b. The links 55 are attached to a frame 56 to which the pusher 48 is secured. The magazine 142 is similarly supported and the pusher 143 is reciprocated over a table 143<a> by a cam 144, on the shaft 22, a bell-crank iever 147, rod 148 and a spring-returned slotted and pivoted lever 149 con. nected to the cross bar 152 of the pusher frame 153. The sides of the stencil boxes comprise members 7 having lugs which engage posts on the main frame, and the bottoms are preferably each in three sections, the middle section, i.e. the stencil plate proper, being removably held in position by clamping screws &c. The stencil plate of the rear hopper is of greater area and thicker than the stencil plates of the front hopper to allow for the greater thickness of the coating. The hoppers are reciprocated by a sprocket wheel 66, on the shaft 23, which is connected by a chain 67 to a sprocket 68 the hub of which is connected by a chain 67 to a sprocket 68 the hub of which is rotatablv and slidably mounted on a shaft 69, the wheel 68 having half the number of teeth of the wheel 66. The shaft 69 extends half way across the machine and ends in a crank 72 connected to a rod 79 which oscillates a rocking frame 80 attached to the connecting bars 65. A disc 73, secured to the shaft 69, is provided opposed lugs 74 which engage similar lugs 75 on the sprocket wheel boss which is reciprocated on the shaft 69 by a cam 77, stationary lug 78 and a returning spring 76. The lugs are thereby engaged and disengaged so that the hoppers are moved during one half revolution of the shaft 69 and remain at rest during the other half. The feed rollers 63 are preferably fluted and their shafts are provided with intermeshing pinions of different sizes. The rollers are intermittingly operated by a cam 89, on the shaft 22, which oscillates a pivoted lever 90. This lever operates ratchet gearing on the shaft 63<b> through levers 93, 94, 88, the roller block 92 being adjustable on the lever 93. The feed plates 64 are simultaneously oscillated, as the hoppers reciprocate. by levers 95, 95b, 96 which are connected to a stationary post 97. The free edges of the plate 64 have square notches which intermesh as the plates pass one another. The knock-out pins 98 are mounted on bars 99 attached to cross members 100, 100<b>, having guide pins 102, the ends of the members 100, 100<b> engaging with slots in cranked levers 103 mounted on rock shafts 105, 105<a>, 107, 107a which are provided with arms 106, 106<a>, 108, 108<a>, respectively, supported by posts 109, 109<a>, 114, 114<a>. The posts 109, 109<a> are connected by a bar 110 secured to a vertical spring-pressed rod 111 having a forked end secured to a link 112 operated by a cam 113 on the shaft 23. The cam 113 is shaped to drop the arms 109, 109<a> slightly and then to drop them suddenly, the rear knock-out pins of each hopper being thus similarly moved. The front pins are similarly moved by posts 114, 174<a>, bar 115, rod 116, link 117 and cam 118, this cam being arranged diametrically opposite to the cam 113. The cushions 119 comprise open top boxes which contain cushioning pads or inflated rubber bags and are connected by bars 128, lifted at the ends by duplicated levers 121, blocks 122, rods 123 &c. by a cam 120. The aligning mechanism comprises a frame having three notched cross plates 130, 131, 132 which engage the cakes below the stencils and at the rear of the magazine 142, the plate 132 being hinged to give access to the base of the magazine and the pressers 159. The frame is moved between a rearward elevated position and a forward lowered position by a cam 133. on the shaft 22, lever 134, link 135 and a crank 146, on the shaft 137, having an arm 139 aligned with an arm 138. The frame is mounted on the arms 138, 139 at the front end, and on rock-arms 140 at the rear end. The pressers 159 are cupped and preferably cushioned and are carried by a frame 155, guided in a bracket 157, which is moved by a crank, on the shaft 22, connecting rods 164, 166, and cams 160 on the shaft 161 which engage the forked ends of the frame 155. The pressers 159 are moved rearwardly by blocks 162, to align the top and bottom cakes against the plate 132. The permit the hopper-shifting and knock-out mechanism to remain idle during adjustment &c., the pinion 23<a> is mounted on a sliding sleeve having lugs 170 which engage notches in a sleeve 171. keyed to the shaft 23. A. lever 174 engages an axial rod 173 which operates the clutch. The machine may be used for producing single cakes with one or two layers of confection, or sandwiches with one layer, by disconnecting redundant parts.