Patent GB-190822182-A (GB)
Title: Improvements in or relating to Machines for Attaching Rands to the Bottoms of Boots or Shoes.
Filed: 1908-10-20
Granted: 1909-11-22
Abstract: 22,182. Marsh, J. J., Bates, A., Briggs, T., and British United Shoe Machinery Co. Oct. 20. [Patent of Addition to No. 14,247, A.D. 1908.] Welts and welting; nailing.-In machines for attaching rands to the bottoms of boots and shoes, means are provided for effecting a relative displacement of the last and rand, to vary the position of the rand along one or both sides of the boot &c., so as to cause the rand to project to the desired extent. Means may also be provided for effecting an additional relative shift of the last and rand at very curved parts, such as the toe, to ensure, more particularly with heavy rands, that no part of a rand shall project less than the desired distance, any excess material being trimmed off subsequently. Both relative movements may be effected by a single mechanism, or by separate mechanisms, automatically or otherwise. Fig. 5 shows one arrangement applied to a loose-nailing machine of known type. The rand guide D is stationary, and the edge-rest E is mounted to slide in the block E', which is adjustably secured to the flame. In passing from the waist to the forepart of the sole, the edge-rest is forced to the left by an arm on the rock-shaft G, which is actuated for the purpose by operating the knee-lever H. In passing around the toe, a further movement is given to the edge-rest by the lever F, which is actuated by the cam B<2x> on the hub of the revoluble jack B. The adjustable block E<2>, which determines the limits of movement of the edge-rest, may be replaced by an adjustable screw mounted in the lever F so as to abut against the edge-rest slide. Fig. 5 also shows a mechanism whereby, when working around the toe or heel portion, the contour of which approximates to an arc of a circle, the jack support is displaced laterally into a position corresponding to the centre of curvature, so that only a simple turning movement of the boot is required at this part. The lateral displacement of the support is effected by a groove cam B', either in the cam block B<2x> or in a separate block, engaging a roller A<10> carried by a pin A<12> mounted in the frame. Alternatively, the displacement may be effected by a manually-operable member. To permit the movement of the support, the jack-post is made in two parts, which are connected by a ball-and-socket joint B<4>. In a modification, the lever F and rock-shaft G are adapted to operate on the rand guide instead of on the edge-rest. In another alternative construction, a movable member is coupled to the rand guide by a system of levers &c., so that movement of the member transmits movement of a different extent to the guide. Two edge-rests, which engage the side of the last immediately below the level of the sole face, are located slightly in front of the movable member, so that parts of the boot that are straight, or have only a slight curvature, are prevented from engaging the member. The rests, however, are so spaced that the toe or other parts of relatively great curvature pass between them, and operate the movable member. Or, one or both rests may be pivoted so as to be angled to different degrees by the varying shape of the contour, and such movement may be utilized to effect the necessary movement of the rand guide.