Patent GB-191213947-A (GB)
Title: Improvements in or relating to Lasting or like Machines.
Inventor: BOULT ALFRED JULIUS
IPC: A43D21/12
Filed: 1912-06-15
Granted: 1913-07-15
Abstract: 13,947. Boult, A. J., [United Shoe Machinery Co.]. June 15. Lasting. - An endlasting mechanism for bed lasting - machines comprises means for adjusting the wipers relatively to the heel band, so that, when working on crooked lasts &c., both devices can be adapted to the contour of the particular portions of the shoe on which they respectively act; it also comprises an improved arrangement of the wipers, an improved method of mounting the heel band, and means for shaping the end portions of the heel - stiffener flange. The lasting-head, shown in plan view in Fig. 1, is mounted and actuated as described in Specification 22,630/08, and is furnished with a cover plate 22 for the wipers, each of which consists of rear, middle, and front sections 20, 35, 40, Fig. 3. The rear sections 20 are connected by links 26, Fig. 1, a cross-bar 27, and a plunger 28 to the operating lever 30, and are formed with inclined slots 25 engaging studs 24, so that, on the operation of the lever, the sections are given a combined advancing and inwardly closing movement. The studs 24 are carried by slides 32 mounted on the ends of a right and left handed screwed rod 34, by the rotation of which the wiper sections 20 can thus be adjusted to open more or less for shoes of different widths. Each section 20 is chamfered on its under side to receive the adjacent middle section 35, which has an elongated projection 35*, Fig 3, engaged in a slot 37 in the section 20, and a pivot stud 36 on the projection 35* engages in a transverse slot in the cover-plate 22; these connexions prevent the middle sections from having any advancing movement, while compelling them to move inwardly with the rear sections. The front sections 40 are pivoted to the middle sections at 42, and have curved slots 44 engaged by studs on the ends of laterally-stationary bars 45, so that, as the wipers close, the front sections move inwardly with the middle sections and swing rearwardly on their pivots 42, thus tending to gather the stock rearwardly over the heel seat. The bars 45 can be longitudinally adjusted, separately, for more or less curvature by screws 46, and can also be adjusted simultaneously in opposite directions, for right and left shoes, by the transverse slide bar 50, which has oppositely inclined slots 47 engaging studs on the bars 45. The movement of the bar 50 is limited by stop-blocks 52, which are adjustable by right and left threads on the rod 54. For shaping the end portions of the heel-stiffener flange, each front section 40 is cut away on its lower side to receive a shaping- member 60, Figs. 3 and 6, which is supported by the lug 61 and stud 63 in slots in the front section and is normally projected in advance of the wiping edge by the spring-pressed plunger 62. As the wipers move inwards, the members 60, by a combined wiping and rubbing action, press the edges of the stiffener in against the rib of the shoe; the members 60 recede beneath the sections 40 while the latter advance to fold the stock over the lip, until they reach the limit of their inward movement, relatively to the sections, and they then exert a final unyielding inward pressure. In the modification shown in Fig. 12, the front sections are dispensed with, and the front end of each of the middle sections is formed with a raised portion 40*, which is recessed underneath, so that the wiping edge 60* at this part is set back from the main wiping edge. The edge 60* presses the upper and heel stiffener firmly into the angle at the base of the rib, while the part 40* folds the margin of the upper &c. over the top of the rib, as shown. The face 141 is preferably provided with pins to grip the surface of the leather. To enable the wipers to be adjusted relatively to the heel band, to adapt them to the contour of the last, the cover plate 22 is formed with slots 70, Figs. 1 and 3, curved about a common axis located near the rear end of the heel band, so that the cover-plate, and with it the wipers, can be adjusted about this centre. The adjustment is effected by the lever 76, which in mid-position rests between two stoppins 78, but which can be swung to either side of these pins to adjust the wipers for right and left shoes. The stop-pins 78 are adjustable simultaneously in opposite directions by the screw 80. The heel band 12, Fig. 10, which is embraced by a chain connected to the inner ends of arms 109 pivotally mounted on two longitudinally-movable slide-bars, is pressed inwards both at the upper and the lower portions of its forward ends, to adapt it closely to the contour of the last, by the pivoted pressing-members 105, 112, which are connected through the arms 109, 116 by the equalizing - levers 122. The members 112 are hooked at 114 to engage under the band, so that they can move the latter outwardly as well as inwardly.