Patent GB-196976-A (GB)
Title: Improvements in apparatus for forming tapered or conical cups
Filed: 1922-01-06
Abstract: 196,976. Rogers, F. H., (Vortex Mfg. Co.). Jan. 6, 1922. Paper bags and the like, making.-In apparatus for making conical waterproof paper or the like cups, a blank is folded to cause two of its edges to adhere together, the sealing strip thus formed being folded over to adhere to the body of the cup, and a projecting part of the strip being secured to the other side of the cup. In the machine shown, the blank 39, substantially of the form of a developed cone, as shown in Fig. 22, is cut from paper strip or may be supplied automatically or by hand ready made to the machine, is glued upon one edge 39<a>, and is folded upon itself so that the edges 39<a>, 39<b> adhere to form a double strip 39<c>, which is again glued and bent over to adhere to the main body of the blank, as shown in Fig. 26. The projecting corner 39d is bent over to adhere to the opposite side of the then completed cup, which is subsequently passed between waterproofing - rollers. The flattened cone is opened by passing it on to a coned former, upon which it is smoothed by rollers, which rollers act also to strip the cone from the former and direct it to a support, upon which a pile of cups may be accumulated. An electromotor drives through toothed gearing 174, 173, Fig. 4, a shaft 23, Fig. 3, from which all the machine parts are operated. Paper strip passes from a drum 2 between rollers 7, 8, which are driven by toothed and ratchet gearing to give an intermittent feed of the strip to stamping-dies 24, 34, the movable die 24 of which is reciprocated by cam means and carries on a pin 50 a lever 47 one end of which operates a plunger 38 and the other end contacts with an adjustable stop 52 on the fixed die 34 as the blank is cut, so as to press the cut blank down upon a carrier 37 which is secured to a slide 66 reciprocated by a, crank and pin-and-slot link-work 67, 73, &c. from the shaft 23 so as to provide a pause at each end of its stroke. Rotating rollers 54 remove waste strip from the machine. The blank 39 lies upon the carrier 37, as shown dotted in Fig. 4, and moves with the carrier beneath a rotating glueing-wheel 65 which glues the edge 39<d> and thence on to a stationary bed 78, with an inclined edge 90 corresponding with the inclined edge 62 of the carrier 37, transfer to the bed as the carrier 37 returns being effected by camoperated fingers 80 which are lowered behind the blank as it advances and prevents its return. A forming-plate 91 also is secured to the reciprocating slide 66 and when the carrier 37 is returned to its starting position overlies the blank 39 and the bed 78 as shown in Fig. 14. A vertically-moving folder 93 secured to a camoperated slide 59 then rises to fold half of the blank at right angles upon the edge 92 of the plate 91 and comes to rest with a horizontal slot 95 therein so arranged that the blank is carried therethrough by the next stroke of the reciprocating plate 91, thus doubling the blank on itself so that the edges 39<a>, 39b adhere. As the doubled blank leaves the slot, the doubled edge is turned at right-angles by fingers 96 on the folder 93 and is glued by a rotating glueing-roller 97, being turned over on to the blank in the manner shown in Fig. 26 by a stationary bevelled former 100, Fig. 14. The forming plate 91 at the end of its stroke carries the blank above a bed 103, to which it is transferred by fingers 102, interconnected to move with the fingers 80, when the plate 91 returns. A lever 110 interconnected by an arm 111 with the folder 93 then is lowered to engage the blank corner 39d and bend it downwards at right angles with the blank. At the same time a rotating roller 120 carried on an arm 117 provided with a screw 123 bearing on the lever 110 is pressed into engagement with the blank and feeds it forward to rotating rollers 115, 116, the corner 39d being folded upon the underside of the blank in this process. The roller 116 rotates in a reservoir 127 containing waterproofing material such as paraffin wax and heated by a hot water, steam, or gas chamber 128, so that the wax is pressed into the material of the cup. The finished cup in the flat condition slides down a shoot 150 and rests upon pins 151, Figs. 3 and 5, in a frame 154, which also carries spring- connected levers 156, with roller ends 152. The frame 154 is reciprocated by a cam 171 on the shaft 23 acting through a bell-crank lever 164, 168 carrying a balance weight 172 and serves to open the flattened cone by passing it over the stationary coned former 155, the rollers 152 overtaking the cone and smoothing out its creased edges. Finally the rollers over-run the cone and on their return strip it from the former so that it falls into a receiver 166, in which a pile of finished cups may be accumulated.