| 摘要 |
474,093. Making paper cups. LUCUP CORPORATION. June 10, 1936, No. 16246. Convention date, Nov. 8, 1935. [Class 18] In a machine for making tapered paper cups from a web of paper, a roll of paper 9 is mounted in hangers 8 by a spindle 10, the web passing over a supporting roller 11 and guide roller 21 to form a loop shown in Fig. 10, the free end of the web is pushed through feed rolls 24 and 30, and punch 36 is actuated by hand to shape the end to that of the edge 41 of the die shown in Fig. 12. Gumming devices 115-120, Fig. 4, and 125- 128, Fig. 11, are then placed in position, the latter over rollers 21, 24, Figs. 1 and 10, and the machine started by driving pulley 113, Fig. 1. The web is fed by a driven roller 12 on the end of a heavy arm 16 so as to maintain the loop in the web, and passes beneath feed rolls 30, and between surfaces 33a, 25, Fig. 12, to the position shown in Fig. 1, which is occupied by blank 51, a strip 35 of gum being meanwhile applied by means of gumming disc 34. A shoe 62 is now pressed on to the web by a spring 65 which is released by a cam 67 on a shaft 55. A cam 43 then actuates lever 44, 46 and shaft 45 to cause punch 36 to descend and cut the blank by the edges 41, 42. An air pump 129 is then actuated by crank 131 to blow air through nozzle 132 to eject the waste cut-out through an opening 40 into a receptacle. Shoe 62 is now lifted by cam 43 and a creasing roll 54 coacting with a roll 52 with a flexible covering 52a creases the blank along the dotted lines 51a, Fig. 13. A guard 54a prevents the curling up of the edges of the blank. The blank then passes over a plate 78 and under a guide bar 78 to rolls 68, 70 after which the edges are engaged by fingers 80, 82 so that the ungummed side is folded a little ahead of the gummed side. Fingers 81, 83 then further fold the sides one on the other, and the blank passes between pressing and creasing rolls 84, 86. Creasing blade 92 on roll 86 coacts with grooves 91 on roll 84 to crease the blank on the dotted line 51c, Fig. 14, while the two sides are squeezed on the central portion as shown in Fig. 7, so that they adhere, the end of the blank assuming a folded position about line 51c. The grooves 84a and 86a allow the ends of the folds to remain in a slightly extended position. This end of the blank then moves through a clearance 97 in a roll 94 and past a gumming pad 98 to pressing rolls 93, 94, whence it passes beneath shoes 101 which, press the sides down on plate 100. A finger 103 then folds the end 51d of the blank on the gum 133. A guide 104 then passes the end between pressing rolls 105, 110 which press the end 133 upon the partly folded blank to cause it to adhere, and the blank, now in the form of a completed cup, is delivered to a trough 111 in nested formation, the sides of the trough squeezing the cups to cause the mouths to open. The trough may also be shaped to receive the cups in stacked formation. A cup of the modified form shown in Fig. 18, may also be formed. Cutting rolls may be used instead of the device shown. |
