GB681733A - Improvements in stapling machines - Google Patents

Abstract

681,733. Stapling. REES, PITCHFORD & CO., Ltd., and LANGFORD, D. I. Feb. 1, 1951 [Feb. 16, 1950], No. 4006/50. Class 89 (iii). A stapling device is provided with a fullstroke mechanism comprising a spring-controlled pivoted pawl 9 which in one form, Fig. 1, is carried by a driver-operating lever 6 and cooperates with stops on the casing and in another form, Fig. 6, is carried by the casing and cooperates with stops on a driver-carrying bar 1a. As the lever arm 6a which engages with the driver 4 moves downwards, the pawl 9 snaps past a fixed pin 12 and can only re-pass the pin after it has been rocked to an inoperative position, in which it is retained by its spring 10, by engagement with a surface 13 at the end of the driving stroke. The pawl is returned to its operative position by engagement with a surface 14. The staples 15 are supported during driving by a guide plate 5 which is lowered by a spring 11 fixed to the lever 6, being held in its normal position by a spring-pressed ball 19. The lever 6 is operated by a spring-pressed pivoted hand-lever 1 and the anvil 8 is carried by an arm fixed to the main casing. A spring 21 prevents a staple from rising with the driver. In the form shown in Fig. 6, the pawl 9 co-operates with a pin 24, a surface 1b and a pin 25 corresponding to the pin 12 and surfaces 12 and 14. A hand knob 1 is provided on the driver-bar 1a which is raised by a spring 26.