| 摘要 |
1,059,427. Feeding sheets. KLIKLOK CORPORATION. Nov. 8, 1965 [Nov. 10, 1964], No. 47314/65. Heading B6B. [Also in Division B5] In a machine for folding-up blanks B to make boxes (see Division B5), a device for feeding slotted blanks one at a time from a magazine comprises a pair of suction cups 48 carried upon arms secured to a cross-bar 51. Links 58 at the ends of the cross-bar 51 are connected to a parallel cross-bar, and each carry at their ends rollers 52, 57 running up and down a vertical track 53. The upper end of the vertical track 53 is curved over to the horizontal. Parallel to the vertical track 53 is a second vertical track 63, engaged by a roller 62 on an arm 60 secured to the cross-bar 51. An electric motor shaft (92), Fig. 6 (not shown), drives through a crank (85) and a slide block (87) to a lever (86) fulcrummed at (88) on the machine frame. The end of the lever (86) is connected through a link (90) and a lever (89) to a shaft (91), accordingly oscillated back-andforth, and carrying a fast lever (76) having at its end a push-rod 59, Fig. 1, whose up-and-down movement slides the carriage 51 and the suckers 48 &c. to carry the blanks. The upper curved end of the vertical track 53 tilts the carriage 51 &c. so as to engage the suckers 48 with a blank B in the magazine. When the push-rod 59 moves downwardly, the curved track pulls the suckers 48, with the attached blank B, out of the magazine, away from blank supports 14 . . . 16. The blank B is then traversed downwardly onto a stop (83), Fig. 2 (not shown). Vacuum is applied to the suckers 48, Fig. 1, through a pips 69 from a valve (67), Fig. 2 (not shown), connected to a pipe (80). The valve (67) can be vented to the atmosphere by manual actuation of a control (79), to prevent feeding of the blanks. The pipe (80) is connected through a valve (73), Fig. 7 (not shown), to a pipe (71) and a suction pump (72). Two flaps (74), secured to the oscillating lever (76) driving the push-rod (59), reciprocating the sucker carriage, coact with the valve (73) to open it to vacuum when the carriage is moved downwards, thus energizing the suckers (48) to attach themselves to a blank, and venting the valve (73) when the carriage has reached the bottom of its travel, thus releasing the suckers from the blank, which is left upon the stop (83). Venting of the suckers (48) &c. during a feeding oparation is automatically prevented by an interlock, as described in Specification 987,711. When the cross-bar (51) &c. has returned to its upper position, a plunger (46), Fig. 2 (not shown), advances horizontally to remove the blank from the stop (83) and force it through a boxmaking die. |
