Patent GB-513345-A (GB)
Title: Improvements in or relating to the application of sheet material to boxes or box blanks
IPC: B31B15/00
Filed: 1938-05-09
Abstract: 513,345. Making boxes. STOKES & SMITH CO. May 9, 1938, No. 13784. Convention date, May 17, 1937. [Class 18] A machine for applying sheet material to boxes or box blanks 1, comprises a reciprocating former F which receives a box or box blank with partly applied sheet material and moves the box &c. through one or more positions at which part of the sheet-applying operations is performed, a second former F<2> which moves the box &c. through one or more positions at which another part of the sheet-applying operations is performed, and a reciprocating carriage 66 which transfers the box &c. from the former F to the former F<2>, A box B has its base stuck to an adhesive wrapper W which, as shown, may be provided with corner tabs t. The wrapper may be omitted, the tabs being then of the type shown in Figs. 20 to 23 of Specification 411,947. The box 1 is placed on a platen P, the former F descends into the box and the platen and former descend together past brushes 45 and rolls 44 which wipe the sides SW of the wrapper against the box to the dotted line position where the ends of the box are engaged by relatively-movable holders 79, 82 on the carriage 66. These holders have surfaces which wipe the flaps f against the box ends. The former F then ascends; stripper rods 34 remain lowered for a time sufficient to strip the box from the former and then they too ascend. The platen descends still further between longitudinal slides 67 forming the carriage frame, and the carriage then moves to the right carrying the box &c, to a position beneath the former F' which descends into the box and presses it out of the holders 79, 82 on to a platen P<2>. The former F and platen P<2> descend between rolls 146, which wipe the flaps EW of the wrapper against the box ends, and then come to rest. Just before they come to rest the upper part #F of the (two-part) former F<2> is arrested and the two parts AF, MF are thus separated. Four tools 149 now turn in the margins M, Fig. 17, the part AF descends on to these tools, the tools are retracted and the part #F drops into the box, folding the margins against the inside of the box. Pressers 150 lightly press the box walls after inward movement of the tools 149, and then exert heavier pressure when the part #F has dropped. The former and platen now rise with the completed box, the platen reaches its upper limit of travel, stripper rods 111 remain stationary while the former F<2> ascends and then rise, and the box is pushed out of the machine by the returning carriage. If the box is in the form of an unstayed blank the side walls thereof are supported during the descent of the former P and platen F by brushes 50, and the end walls are supported by holders 96 carried by the auxiliary plunger 32 which supports the stripper rods 34: as the holders 79, 82 engage the box, cams 98 on the carriage swing the holders 96 away from the box ; in this case also a former having ports communicating with a suction supply may be used. Specifications 249,967, 280,528, [both in Class 18], and 466,578 also are referred to.