Patent GB-190708722-A (GB)
Title: Improvements in and relating to Machines for Applying and Setting Staples.
Filed: 1907-04-15
Granted: 1908-02-06
Abstract: 8722. Lake, H. H., [Boston Wire Stitcher Co.]. April 15. Stapling. - A machine for stapling paper sheets &c., adapted for different thicknesses of work, comprises a work-support 4, Fig. 1, an arm 7 pivoted at 6 carrying the staplefeeding mechanism, and a bell-crank lever 12 pivoted on the arm 7 and actuating the driver 9, Fig. 4. The arm 7, which is depressed to hold the work on the table 4, and the lever 12 are actuated by a link 17 consisting of two telescopic parts 24, 25 with a yielding spring connexion 26, enabling the driver to accommodate itself to different thicknesses of work. A pin 28 and slot 29 limit the yielding movement of the link. The arm 24 is pivoted to a pin 15 on a crank-disk 16, actuated by a cord or wire 19 and a treadle, and retracted by a spring 23. A tooth 38 on the disk 16 raises a slide 36, Fig. 8, the upper end of which engages projections 35 on two arms 33 carrying pivoted clinchers 32. The arms 33 are moved towards one another on their pivots 34, and the clinchers 32 engage camsurfaces 42 which cause them to rise and clinch the ends 45 of the staples as shown. After the clinchers 32 have been brought together, they and the arms 34 are raised slightly farther by the slide 36, this movement being permitted by slots 46 through which the pivots 34 project. The staples to be driven are held on a removable magazine comprising a bar 48, Figs. 4 and 12, preferably of wood, on which the staples are retained by an envelope 50 of paper. Flanges 49 on the bar hold the paper away from the sides of the staples, enabling them to be fed to the driver by a pusher 57 comprising an upper hooked portion 60, side portions 59 embracing the bar 48, and projections 63 engaging grooves 64 in the bar. The magazine is placed against an abutment 56, and is retained by a rod 51, Fig. 1, pressed against the bar 48 by a spring 65, which passes round a pulley 66 and is secured to the hook 60, so that the same spring both holds the magazine and feeds the staples. As the pusher advances, its forward edge 61 cuts the paper envelope, which may have a line of perforations for this purpose. The abutment 56 is formed on a plate 54 mounted in an horizontal guide in the bar 7. The plate 54 engages the face-plate 11 on both sides of the driver passage 8. In a modification, the bar 48 and the pusher 57 are both formed of sheet metal, and the abutment 56 is provided with projections which enter and engage the upper angles of the front end of the bar 48. Each staple on being pushed off the bar 48 into the driver passage 8 falls across and is held by a block 67, Figs. 4 and 9, having flanges 69 sliding in grooves 70 in the arm 7. The block 67 is normally pressed outwards by a spring stud 71, and has a shoulder 74 engaging the abutment plate 54. On the front of the block are two bevelled wings 73, the space 75 between them being normally occupied by a tongue on the face-plate 11. The driver on descending engages the bevelled surfaces and forces back the block 67 against the spring 72. A pivoted link 14 actuating the driver 9 has a reduced part 82 projecting through a hole in the driver, and is provided with flat surfaces 78, 83 engaged by a spring stud 79, by means of which it is held in either the operative or the inoperative position. Specification No. 20,958, A.D. 1900, is referred to.