Patent GB-267208-A (GB)
Title: Improved means and a new method or process for making paper boxes or the like
IPC: B31B1/90
Filed: 1925-12-07
Abstract: 267,208. Bergstein, S. Dec. 7, 192 Feeding webs.-In making paper boxes in which the parts are separately formed and are secured together by adhesive strips, a machine is employed for securing double-faced adhesive strip to the box sides. In one form, paper sheets or blanks are fed by hand between discs or rollers 31, 32. Figs. 2 and 4, from which they pass between discs or rollers 43, 44 to rollers 68, 69, where one or more moistened double-faced adhesive strips 8, supplied from rolls 4 and guided by rollers 10<c>, are pressed on. The rolls 4 and fingers 10<c> are laterally. adjustable on transverse frames supporting them in order to adjust the positions of the tapes on the sheets, and the tapes are moistened by contact with laterally adjustable bands 10 passing through the baths 15. Superfluous adhesive is removed from the roller 68 by scrapers 9<b>. In order to apply adhesive tapes to both sides of the sheets, the taping apparatus may be duplicated beneath. The tapes are severed by cutters 150 carried by severing-rollers 70, 71, and the sheets finally pass between delivery rollers 72 - - 75 to a receiving table. The various rollers are driven from a main shaft 76, Fig. 1, through the toothed gearing shown and a sprocket chain 85, motion being transmitted from this continuously moving system of gears to the intermittently moving rollers through friction clutches which allow of slip during the periods when the various rollers are stationary. Thus a flexible connection to the feed-rollers 32 is provided by mounting the sprocket 84 on a sleeve 86 free on shaft 34 and forming one member of a friction clutch of which the other member 87 is keyed slidably on shaft 34, the required pressure across the faces of the clutch being provided by a spring 89. The drive from the lower rollers 32 to the upper rollers 31 is through a similar friction clutch. To bring the sheets into proper alignment and feed them forward one at a time, trip stop arms 56, Fig. 10, are provided adjacent to the discs or rollers 43, so that each sheet is arrested momentarily bv contact of its corners with the stop arms. While the sheet is stationary, the feed-rollers 31 stop owing to slip in the friction clutches. The forward movement of the sheet is resumed when pins 64 on the trip stop arms are knocked laterally by pins 63 carried by discs 57 on the shaft 45. The connection from the driving- mechanism to the feed-rollers 44 and the severing-roller 71 is through similar friction clutches as shown at 103, Fig. 8, and at 139, Fig. 6. The feed-roller 73 is driven directly from a gear 152, Fig. 1, and roller 72 is driven frictionally from roller 73. The rollers are timed by trip and stop mechanisms consisting of rocker arms 163, 168, and 173, Fig. 1, which act to keep their respective rollers stationary until disengaged by trip pins 109, 130, and 147. The delivery rollers 74, 75 are arranged to rotate faster than the others so as positively to separate the ends of the severed tapes, an arrangement being provided to raise the upper roller out of engagement with the lower roller so that the sheets shall not be fed too far. This is effected by making the bearings of the upper roller slidable vertically and connecting them to cams which are oscillated from the roller 75 by a rocker arm 181. In cases where adhesive, tapes are required on box blanks at right angles to other tapes, the sheets are passed through the machine a second time. A modified form of machine is described in which instead of separate paper sheets, a continuous length of paper is fed from a roll. After passing through adjustable tensioning-rollers, the paper is fed through an adhesive tape-applying apparatus similar to that described above but with the severing rolls omitted, and the taped. sheet is finally cut by a guillotine.