Patent GB-122868-A (GB)
Title: Improvements in Folding and Delivery Mechanism.
IPC: B41F13/54
Filed: 1918-01-04
Abstract: 122,868. Hoe & Co., R., (Hoe & Co., R.). Jan. 4, 1918. Folding paper.- In a folding and delivery apparatus for a printing machine, sheets cut from a number of webs are forwarded side by side to a single folding and collecting mechanism, t h e sheet grippers at the two ends of which are independently operable so that the sheets taken at one end may be folded and delivered without being collected, while those taken at the other end may be collected before being folded, or both ends may be arranged to collect sheets before folding. The apparatus is particularly for use in perfecting presses having forme cylinders carrying six plates along their length and four plates around their circumference, thereby printing forty-eight pages at each revolution, when it is desired to use the full capacity of the press to produce sixteen page papers and is shown as applied to such a press. The six-pagewide perfected web is slit into three two-pagewide webs, two of which are superposed, and the single and double web are carried forward side by side and cut into sheets two pages long. The stream of single sheets is carried forward to one end of the collecting and folding cylinder 10 and the double sheets to the other end. The double sheets are folded and delivered as 16 page papers, while the single sheets are associated in pairs on the cylinder 10 before being folded off as 16 page papers. The ends of the cylinder 10 are pro. vided with two similar but independently operated sets of grippers 16, 17, 18, 19, Figs. 2 and 3. The grippers 16, 17 are carried by rods 22, 23, the rod 22 being mounted in the cylinder head 25 and central web 24 of the cylinder, and the rod 23 being carried by arms 23<a> of a rod 23<b> mounted in the head 25 and web 24. The grippers 16 are opened at each revolution ot the cylinder 10 by an arm 22 and fixed cam 28, and are closed by a spring rod 32<a>. The grippers 17 are longer than the grippers 16, and are opened and closed by an arm 34 and groove cam 40. An arm 42 on the gripper rod 23<b> also engages the cam 40 so that the long grippers have a movement along the surface of the cylinder 10 in addition to their opening and closing movements. The cam 40 is loose on the shaft 12, and is connected by a link 48 to an arm 52, which is pivoted at 54, and may be locked by a bolt 61 to the machine frame 14 or secured by a bolt passed through holes 39 to an arm 56, which is oscillated about the pivot 54 by a half-speed cam 60. The cam 40 is also connected by a link 73 to the loose cam 71 operating the folding jaws 69 into which the sheets on the cylinder 10 are tucked by a blade 72. In operation, at, the end of the cylinder 10 receiving the double sheets, the arm 52 is locked to the framing 14 as shown in Fig. 3, so that the cam 40 is stationary and the grippers 17 move idly after they have moved past the position at which the grippers 16 take the sheets. The double sheets are carried round and folded into the jaws 69. At the end receiving the single sheets the bolt 61 is removed and the arm 52 secured to the arm 56 so that the cam 40 receives an escillating movement. In this arrangement the short grippers 18 take the first sheet, the long grippers 19 afterwards closing on to the sheets, and later, owing to the shifting of the cam 40, holding the sheet while the grippers 18 are opened to take the second sheet. The return of the cam 40 then allows the associated sheets to be folded off by the jaws 69. The folded products are conveyed from the jaws 69 by belts to usual crossfolding mechanism, and may be stitched or stapled.