Patent GB-190429465-A (GB)
Title: Improvements in and relating to Book Rounding and Backing Machines.
Inventor: HESS JOHN
Filed: 1904-12-31
Granted: 1905-12-30
Abstract: 29,465. Hess, J., and Archer, H. Dec. 31. Bookbinding.-In a rounding and backing machine, books are fed automatically, one by one, from a table to a pair of gripping-jaws which hold the book during the rounding and backing process, and from which the next book pushes the finished one. Rounding is done by a convex bar which supports the book while a hollow - rimmed roller or rollers pass over the back, being moved by a variable-throw crank and connecting-rod. In place of the rollers, any known back-former may be used. Fig. 2 is a side elevation, and Fig. 5 a longitudinal and Fig. 6 a lateral section of the machine, which is driven from fast and loose pulleys 10, 11 on the shaft w, which also carries a flywheel 12, toothed wheel 13, and a bevelwheel which drives the shaft t. Through the wheel 14, the wheel 13 drives the wheel 130 on the cam shaft 16. Books are stored, backs uppermost, on the table, and are fed between fixed and adjustable fences 59, 60, by bands 58 running over rollers 51, 52, the roller 51 being moved intermittently by a weight 63 on a chain running over a sprocketwheel 61 provided with a free-wheel clutch and lifted by a lever 64, which is operated from a cam on the shaft 16, its travel being limited by the pivoted guide 67 with its adjusting-screw 66. The front book being fed up to the stop-plate 70 is pushed between adjustable tapering guides by the pusher plate 76 to the jaws g, h. The plate 76 is moved along the guide - spindle 75 by a link on a rocking shaft operated by a crank-pin running in the cam-groove 20. When between the jaws g, h, the book rests on the rounding-fillet l, which is lifted while the book is lightly held by the jaws and so rounds the book. The height of the bar l is adjustable partly by the two inclined surfaces 97, 98, operated by the screw 99 ; a fine adjustment is obtained by the screw 107, which moves a double cottar to raise or lower the part 110, which slides in the part c. The whole sliding part c with the parts f, l is lifted in guides by the cam o on the shaft n, which is rocked by a bar, deriving a reciprocatory motion from a cam on the shaft 16. The bearings of the shaft n are adjustable vertically by screws 115 with divided heads. The jaws g, h are closed by the toggle joint 27, 28, operated by an adjustable link from the cam shaft 16, and are adjustable to accommodate books of various thicknesses by means of the screw 41 moving through a pivoted nut 42, and the wedge 32 moved by the screw 34 journalled in the bracket 35. Pivot joints allow the jaws to rise and fall as required to hold the book up against the backing-rollers 3. These rollers are built up of a central disc 6, Fig. 10, with screw bosses on which fit flanges 7, the distance apart of which is variable to suit books of various thicknesses. The rollers 3 are mounted on a carriage p, which is moved along guides q by the connecting-rod r pivoted at its other end on the crank disc y by the pin s which is movable along the screw z to vary the travel of the rollers. The finished book is pushed away from the opened jaws, when they fall, by the next book, and falls along the shoot 89. The slope of the feed-table may be varied by means of the rack 91 and the pinion 92, which moves the part 57 in guides 90, a ratchet 95 and pawl 96 holding it in place. The Provisional Specification states that a frictional connection may be used to allow the chain-wheel to slip if the next book reaches the stop before the actuating- lever completes its stroke.