US2150277A - Heel-seat fitting machine - Google Patents

Description

March 14, 1939. G. HAZELTON n 2,150,277

HEEL-SEAT FITTING MACHINE Filed May v11, 1938 s sheets-sheet 1 March 14, 1939. G HAZELTON 2,150,277

. HEEL-SEAT FITTING MACHINE Filed May ll, 1938 3 Sheets-Sheet 2 Fig. 2.'

' /A/l/E/v TUR' March 14, 1939. (.3 HAZELTQN 2,150,277

HEEL-SEAT FITTING MACHINE Filed May 1l, 1938 3 Sheets-Sheet 3 Ul f 'Patented Mar. 14, 1939 PATENT GFFICE HEEL-SEAT FITTING MACHINEl George Hazelton, Leicester, England, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey Application May 11, 1938, Serial No. 207,217 In Great Britain May 29, 1937 8 Claims.

This invention relates to machines for use in the manufacture of shoes and is illustrated as embodied in an improved heel-seat fitting machine. y

It is sometimes the practice in the manufactur of compo shoes having short outsoles which are made of leather, rubber or composition material, to cement, or otherwise adhesively secure, substantially the entire heel-seat portion of the sole to the shoe bottom during the sole-laying operation. It is an object of the present invention to improve machines of the general type disclosed in United States Letters Patent No. 1,850,149, granted March 26, 1932 on an application filed in my name, to adapt them for quickly and effectively reducing the heel-seat portions of soles of shoes such as above described for the reception of heels.

With the above object in View, and in accordance with a feature of the present invention, the illustrated machine is provided with crease plates which are forced against and stopped by an adhesive bond securing a sole to a compo shoe, means for trimming surplus material from the heel-seat portion of the sole which heel-seat portion is adhesively secured throughout substantially its entire extent to the bottom of the shoe, and means for breaking the adhesive bond securing the surplus material to the shoe bottom whereby to release the material from the shoe bottom.

During the operation of the illustrated machine a pair of knives which constitute the above-mentioned means for breaking the adhesive bond,- move inward between the shoe bottom and the lateral margins of the cemented-down heel-seat.

portion of the sole sufficiently to release from the shoe bottom the surplusr material which is trimmed from the opposite sides of the heel-seat.

portion of the sole by heel-seat reducing and shoulder-forming knives. The bond-breaking knives do not sever the bond between the formed heel-seat tab and the shoe bottom, thereby insuring that the tab shall serve as a firm foundation to which the heel may be effectively secured.

'I'he various features of the invention will be understood and appreciated` from. the following detailed description read in connection with the accompanying drawings, in Which Fig. 1 is a plan view, partly broken away, of a portion of the illustrated heel-seat fitting machine;

Fig. 2 is a vertical section, partly broken away, on line II-Il of Fig. 1;

Fig. 3 is an angular view showing operative portions of the illustrated machine in the process of reducing the cemented-down heel-seat portion of the sole of a shoe;

Fig. 4 shows a portion of the machine, partly broken away, and a shoe being operated upon, in section on line IV-IV of Fig. 1;

Figs. 5, 6 and '7 are sections on line V-V of Fig. 3 during three different stages of the heelseat fitting operation; and

Fig. 8 is an angular view of the heel end of a shoe the heel-seat portion of which has been reduced by the above machine, the original heelseat portion of the sole and a heel of the shoe being shown in dash lines.

The illustrated machine is described with reference to reducing the heel-seat portions 28 (Figs. 3 and 8) of short outsoles 22 of compo shoes 24, which heel-seat portions are adhesively secured throughout substantially their entire extent to the shoe bottoms 2B, for the reception of heels. The shoe 24, which is off the last, is mounted on a jack 30 (Figs. 1 and 4) slidable along a guideway 3| (Fig. 1) in the machine frame. The shoe 24 on the jack 30 is then moved rearward causing a pair of crease plates 32 to register between the laterally projecting margins of the sole 22 and the overlasted counter portion of the shoe, rearward movement of the sole being limited by a back gage 36 (Fig. 2) which is engaged by the rear end of the shoe.

A treadle (not shown) i's then depressed to move the crease plates 32 toward each other until they are forced against the adhesive bond 38 (Figs. 4 and 5) by which the sole is secured to the shoe bottom 26, thereby locating the shoe widthwise and heightwise in the machine. Upon continued depression of the treadle the jack 30 is raised slightly causing the bottom 26 of the shoe to be forced against the undersides of the crease plates 32 and the central part of the heel-seat portion 20 of the sole 22 to be forced against a holddown 40.

After the shoe has been positioned and clamped in the machine as above described, knives. 42 which are secured to carriers 44 by screws 48 threaded into binder blocks 4l (Figs. 3 and 4) are moved inward from opposite sides of the shoe to form heel-breast receiving shoulders 48 (Fig. 8) on the sole. A pair of beveling knives 50 having cutting edges 52 inclined to the general plane of the sole are then moved forward to reduce the heel-seat portion of the sole thereby cooperating with the shoulder-forming knives to provide a heel-seat tab 54 (Eig. 8). Since the inward movement of the crease plates 32 is stopped by the adhesive bond 30 securing the sole to the bottom 26 of the shoe, it is desirable that the paths of movement 56 (Fig. 3) of the lower ends 58 of the cutting edges 52 of the beveling knives 53 be spaced inward from the crease plates 32 thereby providing a heel-seat tab which is narrow enough to insure the proper seating of the heel upon the shoe.

When the entire heel-seat portion of the sole 22 is cemented to the shoe bottom 26, the surplus material 60 (Figs. 7 and 8) which is severed from the heel-seat portion of the sole bythe shoulderforming and the beveling knives 42, 50, respectively, has to be released from the shoe bottom.

In order to release the surplus material trimmed from the heel-seat portion 2i] of the sole from the bottom of the shoe, each of the. carriers 44 has secured to it by screws 62 (Figs.V 1, 3 and 4) a bond-breaking knife 64 (Figs. 2, 3 and 4) having a straight cutting edge 66 (Fig. 3) extending lengthwise of the shoe and lyingapproximately in the plane of the upper face 68` of the corresponding crease plate 32. The cuttingv edges '|0- of the shoulder-forming knives 42: approximately meet the cutting edges 66 of the bond-breaking knives 64, the arrangement being such that the bond-breaking knives duringtheir inward travel toward each other, break the adhesive bond between the lateral margins of the heel-seat portion of the sole and the shoe bottom. The bondbreaking knives 64 move inward until their cutting edges 66 intersect the paths of 'movement 56 of the lower ends 58- ofthe cutting edges of the heel-seat reducing or beveling knives 50, thereby separating the adherent surplus material trimmed from the heel-seat portion of the sole from the shoe bottom.

The crease plates 32 are secured by screws |72 (Figs. 1, 2 and 3) to sliding beds 'I4 (Figs. 1, 2 and 4) which are movable along guides 16 (Fig. 2) of the machine frame. to the. sliding beds 'I4 are rods 78 (Figs. 1 and2) pivoted to links 80 the lower ends of which are pivoted to a vertical.` slide 82 (Fig. 2) connected v through suitable mechanism to the above-mentioned treadle (not shown). Upon depressing the treadle against the action of a spring 84 the vertical slide is lowered causing the sliding beds 'I4 to move inward toward the median planeV 86 (Fig. 1) of the machine until the'crease plates 32 are forced against the cement bond 38 (Figs. 4 and 5) between the sole and the shoe bottom.

The crease plates 32 (Fig. 3) extend forward of the heel-breast line 38 (Figs. 3 and 8) of the sole andare provided with surfaces sii (Fig. 3) over which the shoulder-forming knives 42 travel. It will be noted that the inner edges of the crease plates 32 are rather blunt and may be forced. with considerable pressure against the adhesive bond between the sole and the shoe bottom without splitting the bond.

After the shoe, positioned lengthwise by the back gage 36, (Fig. 2) has: been clamped between the crease plates 32, the operator continues to depress the treadle (not shown) causing thejack 30 to be raised, thereby forcing the shoe bottom against the under sides of theV crease plates and` the central part of the heel-seat portion 20 of the sole against the holddown 40. The holddown 40 is threaded into a bracket 94 (Figs. 1 and 2) secured by screws SBEV to the main frame and may be adjusted into diierent heightwise. positions with relation to the bracket. The mechanism for operating the crease plates 32 and the jack 30 is identical with corresponding mechanism of the Secured by screws 'IT heel-seat fitting machine disclosed in United States Letters Patent No, 1,847,244, granted March 1, 1932 on an application filed in the names of Hazelton and Ricks, upon which the abovementioned Letters Patent No. 1,850,149 is an improvement. Accordingly it will be unnecessary further to describe the above mechanism herein.

The back gage 36 (Fig. 2) is moved into different operative positions in accordance with the length of the heel 28 in a heel gage 90 (Figs. l

' and 2) through mechanism which is fully described in both of the above-identified Letters Patent whichV may be referred to for a further understanding of the construction and operation of the machine.

The carriers 44to which the shoulder-forming and the bond-breaking knives 42, 64, respectively, are' clamped,-V are secured by screws |00 (Figs. 1, 2 and 4)( to slides |02 movable along guides |04. Screws |05 (Figs. 1 and 4) which are threaded into the slides |02 andare secured to the slides by nuts |01, pass through elongated slots |03v (Figs. 1 and 4) in the guides i041. The lower ends of the screws |06 carry anti-friction rolls ||0 fitting in arcuate channels ||2 of plates H4 formed integral with blocks i6 (Fig. l) which are movable along guideways ||3 of the respective sliding which is movable along a guidevvay |28 and has` secured to it a roll |30 fitting in a groove |32 of a rotary cam |34.

The guides |04 (Figs. 1, 2 and 4) may be adjusted into diierent angular positions upon the respective sliding beds 14 to vary the paths of movement of the shoulder-forming knives 42 and the bond-breaking knives 64 transversely of the sole Vthrough the following mechanism. Passing through arrecess in each of the guides 04 is a threaded shank |35 of a clamp |36 which may be forced against the under sides of the corresponding sliding bed I4 through the provision of a nut |40 which is threaded on the shank. Threaded into the inner ends of each of the guides |04 is a screw |42 (Figs.Y 1 and 4) which passes through an arcuate slot |44 in a corresponding sliding bed 14. 'Ihe slots |44 and the outer faces |46 ofY the sliding beds are centered about vertical axes passing through points |45 which are located at the forwardlimits of movement of the lower ends 58 (Fig. 3) of the cutting edges 52 yof the beveling knives 50. When the nuts |40 and the screws |42 have been loosened the guides |44 are swung about the respective axes |45 until they are in the desired angular positions conveniently determined by graduations |48 (Fig. 1) on the sliding beds 14. The nuts |40 and the screws |42 are then tightened to clamp the guides |04 securely to their sliding beds T4.

With the above arrangement it will be clear that as the sliding beds 14 move inward to force the creaseV plates 32 against the adhesive bond 38 (Figs. 4 and 5) securing the sole 22 to the shoe bottom 26 they carry with them the guides |04 and the slides |02 through which the shoulderforming knivesr42 and the bond-breaking knives 64 are operated. The arrangement of the bellcrank levers |20 and the'linksil24 is such that there is practically no relative movement between the slides |02 and their respective'sliding beds 14 during the movement of the beds.

After the shoe has been positioned in the machine a one-revolution clutch (not shown) is tripped causing the cam |34 to rotate and through the above mechanism to operate the shoulderforming knives 42 and the bond-breaking knives 64.

The heel-seat reducing knives are secured by screws |50 (Figs. 2, 3 andl) to carriers |52 which are movable forward and rearward 'along guideways |54 (Fig. 4 of 'raised overhanging portions |56 of the sliding beds 14. The rear ends of the carriers |52 are provided with grooves |58 (Figs. 1 and 2) for receiving a transverse bar |60 of an operating slide |62 (Fig. 2) which is movable along a guideway (not shown) in the machine frame and has secured to it a depending roll |64 fitting in a groove |66 of the rotaryT cam |34.

It has been found preferable to form the heelbreast receiving shoulders 48 and to break the adhesive bond 38 between the shoe bottom 26 and the lateral margins of the heel-seat portion of the sole before reducing the heel-seat portion and, accordingly, the shoulder-forming and the cement-breaking knives 42 are operated before the beveling knives. It will be appreciated, however, that the sequence of operation of the heelseat reducing knives on the one hand and the shoulder-forming and the bond-breaking knives on the other hand may be reversed.

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

1. A heel-seat tting machine having, in combination, crease plates constructed and arranged to be forced against and stopped by an adhesive bond securing a sole to a compo shoe, means for trimming surplus material from the heel-seat portion of the sole which heel-seat portion is adhesively secured throughout substantially its entire extent to the bottom of the shoe, and means for breaking the adhesive bond securing said surplus material to the shoe bottom in order to release said material from the shoe bottom.

2. A heel-seat fitting machine for operating upon a shoe the sole of which, including substantially its entire heel-seat portion, is secured by an adhesive bond to the bottom of the shoe having, in combination, crease plates constructed and arranged to be forced against and stopped by portions of the adhesive bond which are located forward of the heel-breast line of the shoe, means for trimming surplus material from the heelseat portion of the sole to'reduce the same for the reception of a heel, and knives for breaking the adhesive bond between said surplus material and the shoe bottom whereby to release said surplus material from the shoe bottom.

3. A heel-seat fitting machine having, in combination, crease plates constructed and arranged to be interposed between the bottom of a compo shoe and the projecting lateral margins of the sole of the shoe which sole has substantially its entire heel-seat portion adhesively secured to said shoe bottom, means for trimming surplus material from said heel-seat portion of the sole to provide a heel-seat tab which is secured to the shoe bottom, and knives having cutting edges movable inward from opposite sides of the sole to break the adhesive bondr between the bottom of the shoe and said surplus material whereby to release the material from the shoe bottom.

4. A heel-seat fitting machine having, in com'- bination, a pair of crease plates, a pair of knives for reducing the heel-seat portion of the sole of a compo shoe which heel-seat portion is adhesively secured through substantially its entire extent to thebottom of the shoe, means for operating said heel-seat reducing knives, a pair of shoulderforming knives which move inward from opposite sides of the shoe and cooperate with said heel-seat reducing knives to sever surplus material at opposite sides of said heel-seat portion from the sole, a pair of knives movable inward with the shoulder-forming knives for breaking the adhesive rbond between said surplus material and the shoe bottom in order to release the material from the shoe` bottom, and means for operating the shoulder-forming and the bond-breaking knives.

5. A heel-seat fitting machine having, in combination, crease plates constructed and arranged to be interposed between the bottom of a compo shoe and the projecting lateral margins of the sole of the shoe which sole has substantially its entire heel-seat portion adhesively secured to the shoe bottom, knives movable lengthwise of the sole to reduce the heel-seat portion of the same, knives which are movable inward from opposite sides of the sole to form heel-breast receiving shoulders on the sole and which cooperate with said heel-seat reducing knives to sever surplus material at the opposite sides of. the heelseat portion from the sole, means for operating the heel-seat reducing knives, knives having outting edges arranged adjacent to the sole-engaging faces vof the respective crease plates, said lastnamed knives being movable inward from opposite sides of the sole together with the shoulderforming knives to break the adhesive bond between the shoe bottom and the surplus material of the heel-seat portion of the sole, and common means for operating the shoulder-forming and the bond-breaking knives.

6. A heel-seat tting machine for operating upon a shoe the sole of which including substantially its entire heel-seat portion is secured by an adhesive bond to the bottom of the shoe having, in combination, vcrease plates, a pair of knives having cutting edges which are inclined to the heel-seat portion of the sole and are movable forward in paths spaced inward from the respective crease plates to reduce the heelseat portion of the sole, knives for forming heelbreast receiving shoulders upon the sole, and knives for breaking the adhesive bond securing the surplus material of the heel-seat portion of the sole to the shoe bottom whereby to insure that said material shall be released from the shoe bottom.

7. Aheel-seat fitting machine having, in combination, a back gage for positioning lengthwise a shoe the sole of which, including substantially its entire heel-Seat portion, is secured by anadhesiveb-ond to thebottom of theshoe,crease plates constructed and arranged to be forced against and stopped by portions of the adhesive bond which are positioned immediately forward of the heel-breast line of the sole whereby to position said heel-seat portion of the sole heightwise and widthwise, a pair of knives having cutting edges which are inclined to the heel-seat portion of the sole andare movable forward in paths spaced inward from the respective crease plates to reduce the heel-seat portion of the sole, shoulder-forming knives movable Widthwise of the sole and cooperating with the respective heel-seat reducing :knives lto trim Vsurplus Imaterial iat opposite Vsides of the heel-seat'portion from the sole,=and

knives having cutting 'edges constructed and arranged `to break the adhesive bond between the lateral portions of the heel-seat portion of the sole and the shoe `bottom to insure that surplus material trimmed from the sole by the heel-seat reducing `and the shoulder-forming knives 'shall be released from the shoe bottom.

8. A heel-seat fitting machine for operating upon a shoe the sole of which, including its entire heel-seat portion, is secured by an adhesive bond to the bottom of the shoe having, inrcornbination. knives which are movable lengthwise of the

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