US2619660A - Lasting wiper - Google Patents

Description

Dec. 2, 1952 E. BUTLER 2,619,660

LASTING WIPER Filed July 5, 194a 3 Sheets-Sheet 1 'a\ l f 'T:

. Inventor Dec; 2, 1952' BUTLER 2,619,660

LASTING WIPER 3 Sheets-Sheet 2 Filed July 3, 1948 fnuenfor Ernest L.Bu tier 9 '5 may Dec. 2, 1952 E. BUTLER 2,619,660

LASTING WIPER Filed Jilly 3, 1948 3 Sheets-Sheet 5 inventor Ernest L.Buz/er Patented Dec. 2, 1952 LASTING WIPER Ernest L. Butler, Lynn, Mass., assignor to United 7 Shoe Machinery Corporation, Flemington, N. J a corporation of New Jersey Application-July 3, 1948, Serial No. 36,927

6 Claims. 1

This invention relates to improvements in the construction of lasting wipers and to methods of manufacturing the same, and is herein illustrated in its application to the manufacture of that type of lasting wipers adapted particularly for the manufacture of prewelt shoes. 7 a

In shaping prewelt uppers over lasts in lasting machines such, for example, as that disclosed in United States Letters Patent No. 2,045,595, ranted June 30, 1936, on an application filed in the names of A. E. C. Hall et. al., it is desirable that the wipers be so patterned that in their advanced or overwiped positions their wiping edges are locatedin accurately predetermined relation to the edge of the last bottom This is of paramount importance in prewelt lasting machines of the type above referred to in which the wipers not only shape the upper over the last but also position and support the welted margin for the sole laying operation. Heretofore it has been the usual practice'to pattern the wiping edges of'prewelt lasting wipers from the last makers last bottom pattern, using said pattern as a template to develop a wiper pattern having a wiping edge which is the exact complement of the edge of the corresponding portion of the last bottom pattern. The wiper patternthus developed is employed as a template in scribing the line of the wiping edge on a wiper blank. Lasting wipers developed by this process, particularly rear part wipers operating on the heel and theshank portions of the shoe, in manycases haverequired a substantial alteration of the line of the wiping edge to make them suitable for use in the manufacture of high grade prewelt shoes.- The alteration thusrequired necessitates the hand work of a skilled craftsman and even when the greatest care is used it has been found impossible by this method to achieve uniformly satisfactory results.

It is an'object of the'present invention to provide prewelt lasting wipers'having anaccurately predetermined delineation of their wiping edges which assures the most desirable operation of the wipers-in the lasting of prewelt uppers. It is a further object of the invention to provide a method of making such wipers which obviates the necessity of handwork in the shaping of the wiping edges. I l

In order to facilitate the definition of the invention arear part wiper is assumed to have a forward portion, a heel portion; and a shank portion between the forward portion and the heel portion, the forward portion being divided from the shank portion by a cross line hereinafter referred to as'the waist line, and the shank portion and the. heel portion adjoining each other on a cross line hereinafter referred to as the heel breast line. The waist line and the heel breast line are arbitrarily selected and have no relation to either the construction or the operation of the wiper. The lasting wiper is hereinafter defined with relation to a last bottom pattern having a longitudinal median line extending the entire length of the pattern, a forepart line perpendicular to the longitudinal median line and intersecting the inside edge, that is, the edge on the great toe side of the pattern at the point where said edge is farthest from said longitudinal median line, a waist line perpendicular to said longitudinal median line and intersecting the inside edge of said pattern at the point nearest to said longitudinal median line, and a heel breast line perpendicular to said longitudinal median line and positioned equally distant from the waist line and the heel end of the pattern. The forepart line of the attern determines a corresponding forepart line of the wiper which may or may not coincide with. the forward extremity of the wiper. Similarly the waist line of the pattern determines the waist line of the wiper and the heel breastline of the pattern determines the heel breast line of the wiper. It will be understood that the forepart line, waist line, nd heel breast line of the pattern are arbitrarily selected and have no relation to the construction or operation of the wiper except that the forepart line may, if desired, determine the forward extremity of the wiper.

In its application to lasting wipers the present invention in one aspect thereof comprises a wiper having a forward portion, a shank portion, and a heel portion, as above defined. The forward portion of the wiper has a wiping edge corresponding in length andcomplemental in shape to thatportion of the edge of a corresponding last bottom pattern extending from the forepart line of the pattern to the waist line thereof, Similarly-the heel portion of the wiper has a wiping edge corresponding in length and complemental in shape to that portion of the edge of said last bottom pattern'extending around the pattern from the heel breast line of said pattern to the longitudinal median line thereof. A characteristic feature of the wiping edge of the wiser resides in the fact that the Wiping edge of the shank portion of the wiper is substantially shorter than that portion of the edge of said last bottom pattern extending from the waist line of said pattern to the heel breast line-thereof. The rear-part wiper illustratedinthe drawings is so constructed that its shank portion has a wiping edge corresponding in length and complemental in shape to that portion ofthe edge of said last bottom pattern extending from the waist line of said pattern to a point spaced a predetermined distance, preferably one-eighth of an inch from the heel breast line of said pattern. Said predetermined distance corresponds substantially to the extent of toeward wiping movement of the wipers to overwipe the back line portion of the upper. It will be seen that the wiping edge of a wiper constructed as above described is so arranged that at the completion of such toeward overwiping movement its forepart portion registers accurately with that portion of the edge of the shoe bottom extending from the forepar-t line to the waist line and similarly'the shank portion of the wiper registers accuratelywith a portion of the edge of the shoe bottom extending heelwardly from the waist line.

Rear part wipers of the type heretofore manufactured lack the desired uniformity of overwiping movements along the forward portion and shank portion thereof, the forward portion be cause of the greaterextent of its movement overwiping to an extent substantially in excess of the overwiping' movement of the shank portion. In order to overcome this condition theillustrated wiper, in accordance with a further feature of the invention, is so constructed that when the heel portion of its wiping edge is caused to coincide with the edge of the'heel portion of a corresponding last bottom pattern, the wiping edge of the forward portion of the wiper is outwardly offset relatively to the corresponding edge of said pattern and the wiping edge of the shank portion of said. wiper converges heelwardly relatively to the corresponding edge of said pattern.

In its application to methods of patterning lasting wipers, the present invention consists in a novel method involving the use of a last bottom pattern as a template to determine the delineation of the wiping edge of awiper. In accordance with the preferred method the template is placed on a pattern sheet and a line is scribed along the edge of the template between a point at or near the intersection of the edge of the template and its heel breast line and the pointof intersection of the edge of the template and its longitudinal median line. The template is then moved heelwardly a measured distance and swung laterally a measured distance, completely covering the scribed line, employing as an axis for such swinging movement the point of intersection of the edge of the heel portion of the template and its longitudinal median line. While maintaining the lateral disposition of the template in the region of the forepart line the heel end of the template is adjusted laterally to the extent required to bring the edge of the template into tangential relation to the scribed line. Another line is then scribed along the edge of the template between its forepart line and the point of'tangency, thus completing the delineation on the pattern sheet of the wiping edge of the wiper.

The invention will now be described with reference to the accompanying drawings and pointed out in the appended claims.

In the drawings,

Fig. 1 is a plan view illustrating a last makers last bottom pattern and showing the scribing of a line about the heel portion of the pattern;

Fig. 2 is a view similar to Fig. 1 showing the scribed heel line and indicating by dotted lines the position of the pattern after it is moved heel- Wardly one-eighth of an inch from its initial position and also showing by dot-dash lines the position of the pattern after it is swung oneight f 4 an inch about the intersection of the longitudinal median line and the edge of the heel portion of the pattern;

Fig. 3 is a plan view showing the pattern in its final position and showing also a line scribed along the edge of the pattern between its forepart. line and. the point of tangency at the heel line;

Fig. 4 is a plan view illustrating the old type rear part wiper in overwiped relation to a last bottom pattern;

Fig. 5 is a plan view similar to Fig. 4 showing the improvedrear part wiper of the present invention in overwiped relation to a last bottom pattern;

Fig. 6 is a plan view showing a last bottom pattern positioned between end gages which determine the position of the longitudinal median line thereon; and

Fig. 7 is a plan view illustrating a last bottom pattern in relationto a pair of rear part wipers constructed in accordance with the present in-' vention.

Figs. 1, 2: and 3 illustrate the delineation of the wiping edge ofa rear part wiper on a sheet from which a wiper pattern is to be out. These figures show in successive stages the initial position ofa last bottom pattern employed as a template in the delineation of the line of the wiping edge, the scribing of a line indicating the heel portion of said wiping edge and the subsequent movements of. the template to arrange it in its position illustrated in Fig. 3 preparatory to the scribing of a line indicating the forepart and shank portion of the wiping edge.

Fig. 1 illustrates. a last bottom pattern for a childrens last size8 D employed as. a template for delineating the wiping edge of a pattern for a lasting wiper of the same. size. The reference numeral ll! indicates the longitudinal median line extending. from the toe end to the heel end of said template. Said longitudinal median line may be determined in any known manner, but I prefer to employ for this purpose, gages such for example as those illustrated in Fig; 6 and comprising a toe gage [2 having gaging surfaces I4 arranged at an angle of 120 to each other and a heel gage l6 having gaging surfaces I8 arranged at an angle of to. each other. The gage members are so orientated relatively to each other that a straight line 20 extendinglongitudinally of the template and passing through the apices of the angle of the gaging surfaces I4 and the angle of the gaging surfaces l8 bisects both said angles. The line 20 is the longitudinal median line of the illustrated template. The numeral 22 (Fig. 1) indicates a forepart line arranged, at right angles to the longitudinal median line It and so positioned lengthwise of the template that it intersects the inside edge 24- of the template at the point farthest: from the longitudinal median line. The numeral 26 indicates a waist line perpendicular to the longitudinal median line Ill and. so positioned lengthwise of the template that it intersects. the inside edge 24 at the point nearest to the longitudinal median line. The numeral 28 indicates a heel breast line perpendicular to the longitudinal median line [0 and positioned lengthwise of the template equally distant between the waist line 26 and the heel end of the template.

Fig. 7 illustrates rear part wipers 38 developed accordance with the present invention. For purposes of definition the wipers 30 are considered to comprise each a forward portion 32, a shank portion 34 and a heel portion 36, the forward portion and the shank portion being divided by a waist line 38 and the shank portion and. the heel portion being divided by a heel breast line 40. When the wipers are in their positions illustrated in Fig. 7 with the edges of their heel portions 36 coinciding with the edge of the heel end portion of the template the heel breast lines 49 of the wipers are in alinement with the heel breast line 28 of the template and the waist lines 38 of the wipers are offset heelwardly one-eighth of an inch from the waist line 26 of the template. Similarly the forepart lines 42 of the wipers, which in the construction herein illustrated are the toeward extremities of the wipers, are offset heelwardly one-eighth of an inch from the forepart line 22 of the template. When the wipers 30 are in their positions illustrated in Fig.7 with the wiping edges of the heel portions 36- coinciding with the edge of the heel portion of the template the toeward extremity of each wiping edge is spaced one-eighth of an inch from the edge of the template and the winding edges of the shank portions 34 of the wipers converge heelwardly relatively to the adjacent edge portions of the template and come into coincidence with the edge of the template in the vicinity of the heel breast line 28.

My preferred method of delineating the wiping edges of the illustrated rear part lasting wipers is described as follows: Employing as a template a last makers last bottom pattern of the appropriate shoe size and style, said template is placed on a sheet from which a wiper pattern is to be out. For convenience of description let it be assumed that said template has indicated thereon the longitudinal median line ID, the forepart line 22, the waist line 26, and the heel breast line 28. Employing the edge of the template as a guide, a line is scribed on the pattern sheet between the intersection of the heel breast line and the edge of the template at one side of the template and the intersection of the longitudinal median line and the edge of the template at the heel end thereof. After scribing said line the template is moved heelwardly one-eighth of an inch in the direction of its longitudinal median line from the position indicated by the scribed line 44 to the position indicated by the dotted line showing 46 of the template (Fig. 2). The template is then swung from its dotted line position to its position indicated by the dot-dash outline 48, the axis of such swinging movement being the intersection of the longitudinal median line and the edge of the heel portion of the template. The extent of said swinging movement is one-eighth of an inch at the forepart line of the template. The heel portion of the template is now adjusted laterally to bring the edge of the template into tangential relation to the scribed line 44 while maintaining the lateral position of that portion of the template in the region of the forepart line. In Fig. 3 the angular movements of the template are indicated by the relative angular positions of the dot-dash lines 52 and 54', the line 52 indicating the angular position of the longitudinal median line when the template is in its position shown in Fig. 1 and the line 54 indicating the angular position of said longitudinal median linewhen the template is in its position shown in Fig. 3. While holding the template in its position shown in Fig. 3 and employing the edge of the template as a guide, a line is scribed on the pattern sheet between the forepart line 22 of the template and the point of tangency of the template with the scribedline 44, the new scribed line being indicated in Fig. 3 by-the numeral 50. The scribed lines 44 and 50 combine to delineate the wiping edge of my preferred heel end lasting wiper.

After delineating said wiping edge the further development of a wiper pattern and the manufacture of wipers therefrom proceed in accordance with the usual commercial practice.

In Fig. 4 there is illustrated a rear part wiper 56 of the type heretofore used in prewelt lasting machines. This wiper has a wiping edge 58 which is the exact complement of the edge of the corresponding portion of a last bottom'pattern such as the pattern shown in Fig. 4. By way of comparison there is shown in Fig. 5 my novel rear part wiper 30 in relation to a corresponding last bottom pattern. In each of Figs. 4 and 5 the position of the wiper relatively to the-last bottom pattern illustrates the position of the wiper at the limit of its overwiping movement. It will be seen that in the case of the wiper 56 illustrated in Fig. 4 the wiping edge 58 in the shank portion of the wiper is not uniformly located with relation to the edge of the pattern and the wiping edge in the forepart of the wiper is spaced inwardly from the edge of the pattern to a much greater extent than in the shank portion of the shoe. It will be seen that the wiper 56 must be substantially altered in order to last a prewelt upper with any degree of satisfaction. It will be understood that wipers of this sort after being altered, for example, by filing or grinding, never have perfectly delineated wiping edges and lack the uniformity desired in lasting wipers.

Referring to Fig. 5 it will be seen that the wiping edge of the rear part wiper 30 is spaced substantially uniformly relatively to the edge of the pattern in the shank portion and the forward portion of the wiper. The slight difference in the space between the wiping edge and the edge of the pattern at the forward portion as compared with the cor-responding spacing at the shank favors the operation of the wiper on shoes the uppers of which are somewhat scant and for this reason is considered desirable. In the heel portion it will be seen that the wiping edge at the side of the heel is located closer to the edge of the pattern than at the back of the heel. The illustrated delineation of the wiping edge at the side of the heel has been found desirable in order to make the proper allowance for the extra thickness of the heel stiffener at opposite sides of the heel portion of the shoe. The illustrated delineation of the wiping edge at the back of the heel is dictated by a generally accepted prewelt shoemaking practice which requires wiping the ba-ck line portion of the upper at least one-eighth of an inch in over the last bottom. No difficulty is experienced in overwiping the backof the heel to the extent indicated since the wipers are wide open when this operation is performed.

Rear part wipers, such as the wiper 30, constructed as hereinbefore described require no alteration of their wiping edges to enable them to operate with uniform satisfaction and to meet the requirements of the manufacturers of high grade prewelt shoes.

- Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is: 1

1. A lasting wiper comprising a forward portion, a shank portion, and a heel portion, the forward portion having a wiping edge corresponding in length and complemental in shape to that portion of the edge of a last bottom pattern of the same size and style as the wiper extending from the forepart line of said pattern to the waist line, the heel portion of the wiper having a wiping edge corresponding in length and complemental in shape to that portion of the edge of said last bottom pattern extending from the heel breast line to the longitudinal median line of said pattern, the overall shape of the edge of said Wiper being such that when the heel portion of said wiping edge is caused to coincide with the edge of the heel portion of said pattern the wiping edge of the forward portion of the wiper is outwardly offset relatively to the corresponding edge of said pattern and the wiping edge of the shank portion of said wiper converges heelwardly relatively to the corresponding edge of said pattern.

2. A lasting wiper comprising a forward portion, a shank portion, and a heel portion, the forward portion having a wiping edge corresponding in length and complemental in shape to that portion of the edge of a last bottom pattern of the same size and style as the Wiper ex tending from the forepart line of said pattern to the waist line, the heel portion of the wiper having a wiping edge corresponding in length and complemental in shape to that portion of the edge of said last bottom pattern extending from the heel breast line to the longitudinal median line of said pattern, the overall shape of the wiping edge of said wiper being such that when the heel portion of the wiper is so positioned that its wiping edge coincides with the edge of the heel portion of said pattern the forward extremity of said Wiping edge is spaced one-eighth of an inch from the edge of said pattern and the wiping edge of the shank portion of said wiper converges heelwardly relatively to the corresponding edge of said pattern.

3. A lasting wiper comprising a forward portion, a shank portion, and a heel portion, the forward portion having a wiping edge corresponding in length and complemental in shape to that portion of the edge of a last bottom pattern of the same size and style as the wiper extending from the forepart line of said pattern to the waist line, the heel portion of the wiper having a wiping edge corresponding in length and oomplemental in shape to that portion of the edge of said last bottom pattern extending from the heel breast line to the longitudinal median line of said pattern, the overall shape of the wiping edge of said wiper being such that when the wiper is so positioned that the heel portion of its wiping edge coincides with the corresponding portion of the edge of said pattern the wiping edge of the forward portion of said wiper is oirset both outwardly and heelwardly with respect to the corresponding portion of the edge of said pattern extending from the forepart line to the waist line.

4. That method of patterning Wipers which comprises employing as a template a last bottom pattern of the appropriate shoe size and style, placing said template on a pattern sheet and scribing a line on said sheet along the edge of the template between a point at or near the intersection of the edge of the template and its heel breast line and the point of intersection of the edge of the template with its longitudinal median line at the heel end thereof, moving the template heelwardly a measured distance, swinging the template laterally a measured distance completely covering the scribed line, employing as an axis for such swinging movement the point of intersection of the edge of the heel portion of the template and its longitudinal median line, adjusting the heel end of the template laterally to the extent required to bring the edge of the template into tangential relation to the scribed line, and then scribing a line on said sheet along the edge of the template between its forepart line and the point of tangency, the lines so scribed indicating on the pattern sheet the wiping edge of a wiper for lasting an upper of the same size and style as said template.

5. A one-piece lasting wiper comprising a forward portion, a shank portion, and a heel portion, the forward portion having a wiping edge corresponding in length and complemental in shape to that portion of the edge of a last bottom pattern of the same size and style the wiper extending from the forepart line to the waist line, the heel portion of the wiper having a wiping edge corresponding in length and complemented in shape to that portion of the edge of said last bottom pattern extending from the heel breast line to the longitudinal median line of said pattern, the wiping edge of the shank portion of the wiper merging with the wiping edges of the forward portion and the heel portion of the Wiper to form an uninterrupted curved wiping edge extending throughout the length or" all of said portions and being substantially shorter than that portion of the edge of said last bottom pattern extending from the waist line to the heel breast line.

6, A one-piece lasting wiper comprising a forward portion, a shank portion, and a heel portion, the forward portion having a wiping edge corresponding in length and complemental in shape to that portion or" the edge of a last bottom pattern of the same size and style as the wiper extending from the forepart line to the waist line, the heel portion of the wiper having a wiping edge corresponding in length and complemental in shape to that portion of the edge of said last bottom pattern extending from the heel breast line to the longitudinal median line of the pattern, the shank portion of the wiper having a wiping edge merging with the wiping edges of the forward portion and the heel portion of the wiper to form an uninterrupted curved wiping edge extending throughout the length oi" all of said portions and corresponding in length and complemental in shape to that portion of the edge of said last bottom pattern extending from the waist line to a point a predetermined distance short of the heel breast line, the distan e from said point to the heel breast line corresponding substantially to the extent of overwipe of the wipers at the back line portion or" the upper.

ERNEST L. BUTLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 511,906 OBolger Jan. 2, 1894 1,975,655 Fraher et a1 Oct. 2, 1934 2,042,518 Engel June 2, 1936

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