Patent GB-314917-A (GB)
Title: Improvements relating to stapling or discontinuous wire stitching machines
IPC: B42B4/00
Filed: 1928-03-05
Abstract: 314,917. Manny, F. L.March 5, 1928. Machine details. - A stapling machine, for example for stitching leaves or signatures, has work feeding means comprising a delivery conveyer, feeding rolls, a discharge conveyer, and a stacking apron, the throw and timing of the components being adjustable to vary the spacing of the staples and to deal with work of varying sizes. The machine comprises a stapling head 4 carried by a column 2. The signatures 6 are fed to stapling position by fingers 10 projecting between guide plates 7 from a conveyer chain 11, Fig. 8, driven by sprockets 12 supported in bearings 18 adjustable along rails 20 by a rod 22. The sprockets are driven by bevel gear 26 slidably keyed on a driving shaft 27. The fingers 10 are pivoted to the chain 11 and are held erect by rollers 31 and tappets 33 engaging in guide channels 34. The fingers are retracted at the rear end of the conveyer, to release the work before it is engaged by the feed rolls, by curved members 35 which are pivoted to the guides 34 and held up by springs. Similar means is provided for erecting the fingers at the forward end of the conveyer. From the conveyer the work passes on to inclined plates 41, Fig. 3, being held and guided by a curved spring 43, a double-conical roller 44, a foot 46, and a grooved roller 272 just 'behind the stapling point. The roller 44 and foot 46 are vertically adjustable. The work is carried past the stapling point by upper and lower feed rolls 50, 49 engaging it through a slot 51 in the plate 41, Fig. 8. After stapling, the work is passed to a discharge conveyer comprising a plurality of idle rollers 52, Fig. 1, adjustable along notched bars 55, and coacting driven rollers 56, 56<a>. The driven rollers are supported by housings 59 and driven by bevel gearing 60 adjustable along a driven shaft 61. From the discharge conveyer the work is guided by bars 251, 253 on to a stacking apron 68, which stacks it upon a suitable table. The apron has an adjustable stop member 72 and is carried bv a frame 75 on a standard 77 vertically adjustable by a rack 78 and hand wheel 83. The machine is driven by a motor 86, Fig. 3, driving a main shaft 88 through a variable speed transmission gear 116 and a gear 89 controlled by a clutch and foot pedal 90. The clutch, Figs. 17 and 18 comprises clutch members 91, 92 and a brake member 93, a spring 98 normally holding the clutch in engaging position. A push rod 103 controlling the clutch is operated by a lever 101 adapted to engage, as the shaft 88 rotates', a tappet 105 on a lever 106 operated by a star wheel 108 linked to the pedal 90. When the pedal is depressed, the star wheel moves the lever 106 to inoperative position. When it is released, a spring brings the tappet 105 into engagement with lever 101, releasing the clutch. The beforementioned driving shaft 27 for the delivery conveyer chain is driven from the main shaft 88 through shafts 118, 139, Fig. 13, and a variable speed transmission gear 123. The shaft 139 drives, through bevel gearing 140, 141, a shaft 142 connected by bevel gearing to the shaft 27. The shaft 142 is in two parts connected by collars 145, 146. By adjusting these collars, an initial adjustment of the fingers 10 of the chain is provided. The feed rollers 49, 50 are driven from a shaft 152, Fig. 19. which drives a shaft 153, Fig. 8, driving the roller 49 through gearing 160, 161, and a shaft 162, Fig. 3, driving the roller 50. The shaft 152 is driven from the shaft 88 with a variable stroke by the arrangement shown in Fig. 19. The shaft 152 is operated by a rack 180 rocked by a wristpin 181 on a disc 175 rotatably and eccentrically mounted in a crank disc 173 on the shaft 88. The disc 175 is graduated and is rotated to adjust the throw of the rack. The pivot 186 of the rack 180 is oscillated also by a crank 182, 185 driven by the shaft 88. By suitably timing the rotation speeds of the cranks' 173, 182, the feeding movements of the feed rollers may be varied. The staple clinchers 199 are operated in synchronism with the feed rollers by a bar 192, slide 197, bellcrank 196, and a double-lobed cam on the shaft 88. The upper roller 50 is adapted to be swung into and out of position, being carried by a support 164 pivoted on a shaft 167, Fig. 3, and normally urged into operative position by a spring plunger. It is controlled by links 206, 208 and link 209 operated by a cam comprising two parts 211, 212, Fig. 13, relatively adjustable by a nut 216 to time the moment of engagement of the roller 50. The first roller 56 of the discharge conveyer 56, 56<a> is moved into and out of operative position by connections to the controlling means for the feed roller 50, so that when the latter is operative the roller 56 is inoperative. The shaft 61 operating the discharge rollers 56, 56a is driven from the first transmission gear 116 through suitable shafts and bevel gearing. The stacking apron 68 is driven from a shaft 234 of these connections through shafts 239, 243, Fig. 3. The driving shaft 219 of the stapling head 4 is adjustably eccentrically mounted at 221 for dealing with work of varying thickness and is driven from the main shaft through a shaft 224 and bevel gearing. Reference has been directed by the Comptroller to Specifications 21154/08 and 7661/10.