Patent GB-186378-A (GB)
Title: Improvements in a sanitary paper cup making machine
Filed: 1921-05-25
Abstract: 186,378. Rogers, F. H., (Vortex Mfg. Co.). May 25, 1921. Paper bags and the like, making.-A machine for making conical paper cups from blanks 110, Fig. 25, comprises rotary forming and pressing rollers 18, 26, Figs. 2 and 6, the shaft of the roller 26 being carried in a spring-controlled sleeve 23 pivoted directly to the machine frame at 24 and periodically separated from the lower roller 18 by a cam 21 on a shaft 20 engaging a roller 22 on the sleeve. The rollers are connected by wheels 27, 28 so as to be in gear even when separated, and the shaft 16 of the roller 18 rotates at six times the speed of the cam shaft 20, which also carries a gear-wheel 8 actuating the mechanism for feeding the blanks to the rollers and for ejecting the completed cups therefrom. The roller shafts and the shaft 20 are all driven by gearing from the main shaft 4, the gear 14 driving the shaft 16 being adjustable on the shaft 4 to adjust the time of ejection of a completed cup and the point at which a blank is secured to the lower forming roller. The blanks, piled on a table 89, Fig. 20, are taken one by one and placed in a depression 87 in a reciprocating table 83 by which they are delivered to the rollers while they are separated. The table 83 is drawn into its forward position against an adjustable stop by a spring 105, and is actuated by levers and a connecting-rod from the wheel 8, the tip 110<a> of the blank being supported, while the table is moving forwards, by a sliding member 83a controlled by a spring 86 and carried beneath the table 83; the forward motion of the member 83a is arrested before it can contact with the rollers, and a stop 99 prevents the blanks from being fed too far through the rollers. The blank is secured to the roller 18 by a gripping-finger 42 pivoted thereto and operated to grip the blank as the rillers contact by a spring-controlled yoke 38 pivoted to the roller 18 and actuated by a sliding sleeve 36 engaged by rollers on a bell-crank lever 48 connected by links &c. to the sleeve 23. After being in contact for 3¥ revolutions the cup is completed and the rollers separated by the cam 21 for 2“ revolutions, the completed cup being then ejected from the roller 18 into a shoot 90 by air or other fluid pressure. The compressed air &c. is supplied from a pipe 70 to a central bore in the shaft 16 and roller 18, such bore terminating in one or more apertures 65 at the tip of the roller and the supply of air &c. to the roller 18 is controlled by a spring- pressed valve disposed in a casing interposed in the pipe 70, the valve being opened as the rollers are separated by a lifting member pivoted to the machine frame and actuated by a roller on the wheel 8. The upper roller 26 and the table 83 are heated respectively by gas jets 74, 76 so as to melt the paraffin coating of the blanks at their line of juncture; surplus wax &c. on the roller 26 is removed by an adjustable spring-pressed blade 62 carried from the sleeve 23. The completed cups are led by the shoot 90 to a receptacle 91 having a movable bottom 92 upon which the cups are received and stacked one within the other, the bottom being lowered at each reciprocation of the table 83 by a lever 98 carrying a pawl 97 actuating a ratchet 95 on a drum around which passes the cord 94 carrying the bottom 92. The other end of the cord 94 is connected to a counterweight sliding in a cylinder 96. Specification 176,963 is referred to.