US1178658A - Gripper mechanism for pulling-over machines. - Google Patents

Description

R. F. McFEELY.

GRIPPER MECHANISM FOR PULLING-OVER MACHINES.

APPLICATION FILED JUNE II, 1914.

Patented Apr. 11,1916.

THE COLUMBIA PLANOLIRAPH cm. WASHINOTON. D. c

RONALD F. MOFEELY, or BEVERLY, MAssAcHUsETTs, ASSIGNOR To UNITED sHoE MACHINERY COMPANY, OF PATEEsoN, NEW JERSEY, A CORPORATION or NEW g 1 JERSEY.

GRIPPER MECHANISM FOR PULLINGr-O'VER MAGI-IINES.

Patented pr. 11, 191s.

Application filed June 11, 1914; Serial No. 844,513.

To all whom it may concern:

Be it known that I, RONALD F. MoFEELY, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Gripper Mechanisms for Pulling-Over Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to pulling over or the like machines and particularly to improvements in the grippers for machines of the type shown and described in U. S. Letters Patent No. 1,030,522, granted on'application of R. F. McFeely. "In machines of this type two grippers are provided for each side of the shoe, the grippers being mounted in a single carrier with their gripping faces substantially parallel and their lower gripping edges substantially in alinement. The forward grippers engage the upper in the vicinity of the toe tip seam and the rear grippers engage the portion of upper at and" near the curved .ball portion of the last.

The gripping faces of the rear gripper jaws are therefore at an angle to the curved sides of the ball portion of the last whichthey are opposite and are not in position readily to receive the upper. Furthermore, as the upper is cut in accordance with the longitudinal curvature of the bottom of the last,

the edge of the upper in the shank of the last is inclined downwardly relatively to the forepart of the last and therefore inclined to the horizontal lower edge of the rear grippers which are thereby prevented from engaging the upper uniformly throughout their width, particularly when the upper' has been skimped in cutting and only a small amount of stock is left to be seized by the grippers.

The present invention aims to providea side gripper in which these difficulties are overcome and which is better adapted to draft the upper about the last.

To this end an important feature of the invention is found in providing the rear side grippers with grippingfaces the lower edges of which are downwardly and rearwardly inclined relatively to the lower edge of the adjacent grippers so that the inclined marginal edge of the upper in' the shank of the shoe may be seized by the gripper to a I uniform depth. Preferably also the grip ping faces ofthe rear jaws lie in vertical planes at an vangle to the corresponding faces of the adjacent gripper or substantlally parallel to sides of the last which they are opposlte.

The features of the invention will appear more fully explained in the followingdescription and then pointed out in the claims.

Figure 1 shows in side elevation a gripper embodying the present invention in position on a shoe. Fig. 2 shows in a plan sectional view the relation of the grippers to the shoe.

Figs. 3 and 4 include front and side elevathe upper on to the'last and the grippers are then moved over the last bottom to wrap the upper about the last in which position the upper is secured to an innersole on the last. In the drawings a gripper having one pair of jaws is provided at the toe end of the shoe and side grippers engage each side of the shoe, each side gripper: comprising two inner jaws l and 3 which are fixed upon common carriers 5 and 6 respectively and two outer jaws 2 and 4 separately pivoted to the'said carriers, a sole rest 9'being provided for supporting the shoe against the pull of the grippers.

The rear palrs of gripper jaws usually occupy a position opposite the curved ball of the last and the portion of bottom of the lastwhich slopes from the forepart of the last to the relatively lower heel portion as shown in Fig. 1 and the upper being cut in. accordance with the longitudinal curvature of the last bottom presents an inclined mar- '7 ginal edge portion to be seizedbythe'rear v grippers. Y, a In accordance with this invention the pair of jaws 3, 4, of'each rear gripper are twisted in .such a manner that the grippingface of each jaw is at an angle in thecarrierto the gripping faces of the forward jaws and substantially parallel tothe adjacent sides'of the last as shownin Fig. 2, thus permitting V the jaws readily tore'ceive and engage the upper in the normal position it occupies on the last. Preferably the axis about which the'jaws are twisted is inclined from the 110 vertical as represented by a line 6-6, Fig. 3 with the result that the lower edges of the jaws are rearwardly and downwardly inclined relatively to the axis 9-9 of their pivots and are substantially parallel to the inclined edge of the upper to which they are opposite, thereby enabling the gripping faces of the jaws throughout their entire width, to seize the marginal portion of the upper to a uniform depth.

Preferably, the inclination of the lower edges of the rear gripper jaws correspond to the average inclination of various lasts at the forward portion of the shank of the last, or what is known as the break of the bottom of the last, this inclination of the jaw edges varying according to the inclination of the axis about which the jaws are twisted. It will be noted that by utilizing the entire width of the jaws to seize the upper in its inclined position a substantial hold is secured on the upper and when the upper is tensioned about the last there is less liability of the upper slipping between the jaws and being torn when it becomes held by only one corner of the jaws, as sometimes occurs with earlier forms of jaws. Moreover, when the rear grippers are moved in over the last bottom the upper material in the shank of the last is drawn forward and the upper is carried over the sides of the last at substantially right angles thereto so that there is less difiiculty in properly lasting the sides of the shoe. As an important result incident to the use of grippers having their lower gripping edges inclined to correspond to the position of the upper they are to seize, it is to be noted that a scant upper may be more readily pulled over the last by the machine than would be the case if the rear jaws had horizontal lower edges and therefore required to reach down far enough to obtain a secure hold upon the'upper at their rear corners and had to rise high enough to cause their front corners to clear the last bottom in their overdrawing movement.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is the following:

1. A pulling-over machine having, in combination, operating mechanism, two pairs'of side gripper jaws for engaging the upper on each side of the shoe, and a single operating mechanism for operating said'two pairs of jaws, the "gripping faces of each pair of jaws being angled relatively to the gripping faces of the other pair of jaws and the lower edges of one pair of jaws being inclined relatively to the lower edges of the other pair of jaws.

2. A pulling-over machine having, in combination, operating mechanism, and side grippers for engaging each side of the shoe, each side gripper comprising two pairs of jaws, the rear pairs of jaws having their gripping faces at an angle to the gripping faces of the front pairs of jaws and substantially parallel with the adjacent portion of the side of the last adjacent to which they are to operate, said rear pair of jaws also having their lower edges inclined to the edges of the front jaws and substantially parallel with the portion of the last bottom adjacent to which they are to operate.

3. A pulling-over machine having, in combination with suitable operating mechanisms a gripper for engaging the side of the shoe comprising two jaws, one of which is pivoted, said jaws having gripping faces lying in a plane at an angle to the longitudinal axis of the jaw pivot and having lower edges inclined rearwardly and downwardly relatively to the axis of the jaw pivot.

4. A pulling-over machine having, in combination, front and rear pairs of gripper jaws for engaging each side of the shoe and carrying and operating mechanism therefor, said rear pair of jaws having their gripping faces .twisted relatively to the said mechanism to occupy a position substantially parallel to the side faces of the last which they are opposite and having their lower edges inclined rearwardly and downwardly to lie substantially parallel to the portion of the bottom of the last which they are opposite.

5. A pulling-over machine having, in combination with suitable operating mechanisms, two side grippers for engaging the upper on each side of the shoe, and a com mon carrier therefor, one gripper being adapted to engage the upper near the tip seam and the other gripper near the break of the last bottom, said latter gripper having its gripping faces and lower edges angled to bear a definite. relation to the front gripper for the purpose described.

6. A pulling over machine having, in combination, with suitable operating mechanism, two side grippers for engaging each side of the shoe comprising cooperating jaws one of which is pivoted, one of said pairs of jaws having gripping faces lying in a plane at an angle to the longitudinal axis of the jaw pivot, and. having lower edges inclined rearwardly and downwardly relatively to the axis of the jaw pivot.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

RONALD F. MoFEELY.

Witnesses Crrnsrnn E. Rooms, LAURA M. Goonnmot.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Patents.

Washington, 10.0. a

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