Patent GB-200170-A (GB)
Title: Improvements in or relating to eyeletting or the like
IPC: A43D100/02
Filed: 1922-04-04
Abstract: 200,170. British United Shoe Machinery Co., Ltd., and Goddard, J. W., (United Shoe Machinery Corporation). April 4, 1922. Addition to 185,197. Setting eyelets.-In a machine for setting " blind " or " invisible " eyelets or hooks as described in the parent Specification where means ara provided for accurately locating a clenching shoulder within the layers of work, the clenching shoulder is formed on the punch and is located in, its correct position within the layers during the punching operation, the punch-block having a bellmouthed depression which causes the work to assume a funnel-shape, at the locality of punching, to facilitate the entry of the clenching shoulder into the upper layer or layers of the work. The punch 28 has a shoulder 30 and screws into the holder 27 adjustably secured to an arm 22 by a nut 60 and set screw 51. The arm 22 is pivoted to move vertically on a frame 24 which can rock on a vertical pivot 25, an arm 26 being connected to a regulatable mechanism to determine the length of the feeding motion from the punching locality to the clenching locality. The punch 28, at the commencement of the work cycle, is at its extreme right and lifted position. When the machine is put into motion, the arm 22 is caused to bring down the punch on to the work. The punch block 20 is screwed into an arm 40 pivoted to the frame 24 at 43, and having an extension 44 carrying a spring detent 46 which presses against a plate 47 on the frame. A set screw 48 enables the punch block to be centered with regard to the punch. The punch block 20 and arm 40 are supported by the frame 42 on which they slide. During punching, the punching end 31 of the member 20 first presses the work into the cup-shaped depression 32 of the block 20 and them penetrates the layers. By the time the punching end 31 has penetrated the bottom layer 36, the clenching shoulder 30 has entered the upper layer 34, being helped by the local funnel-shape of the work, as shown in Fig. 3. In order to prevent more than the desired number of upper layers from slipping past the clenching shoulder, a member 53 is adjustably screwed to the holder 27 and carries at its end a protruding, leather washer 52 supported by an internal flange 55, which presses on the work when the punching operation is complete. Meanwhile the reciprocating tool 12 has risen to engage the spindle 14 the leading eyelet in the raceway 16. The presser-foot 21 then rises, and the punch 28 is lifted with the work clinging to it until the end 31 just clears the top 33 of the punch block. The frame 24 then turns about its vertical pivot and brings the punch 28 into alignment with the evelet-carrying spindle 14. Meanwhile, the punch-block 20, which first moves with the punch, is arrested by the engagement of the projection 50 on its carrying arm 40 with the fixed stud 49, the punch moving on alone, and the raceway 16 being moved away from the member 14 by a cam. The lower tools 14 and 12 then rise, and the punch 20 descends, causing the eyelet to enter the work and to be clenched by the shoulder 30 at the appropriate place between the layers of work. The punch 28 and tools 12, 14 are then withdrawn, and the parts restored to their initial position, the punch-block assuming its position below the punch under the action of the spring plunger 46 as the punch arm 22 moves to the right ready for the next operation. Specifications 13084/99 and 114,472 are referred to.