US1235984A

US1235984A - Blank-fitting machine.

Info

Publication number: US1235984A
Application number: US6741915A
Authority: US
Inventors: Elmer E Lane
Original assignee: United Shoe Machinery Co AB
Current assignee: USM Ltd; United Shoe Machinery Co AB
Priority date: 1915-12-17
Filing date: 1915-12-17
Publication date: 1917-08-07
Anticipated expiration: 1934-08-07

Description

E. E. LANE.

BLANK FITTING MACHINE.

APPLICATION'FILED 950.17, 1915.

l ,2 35, Pa-tented Aug. 7', 1917.

ZJIIIIIIIIIIIIIIHIIIIIII ELMER E. LANE, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHIN- ERY COMPANY, OF PATERSON, NEW' JERSEY, A CORPORATION OF NEW JERSEY.

BLANK-FITTING MACHINE.

Application filed December 17, 1915.

To all whom it may concern:

Be it known that I, ELMER E. LANE, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Blank-Fitting Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same.

This invention relates to blank fitting machines and more particularly to cavity rolls for blank fitting machines.

In the manufacture of counters, box toes, shanks, etc, well-known types of machines are employed which use a cavity roll for supporting the blank while it is being skived, molded, etc, to impart a predetermined shape thereto. The blanks, preliminary to being treated, are generally died out to approximately the outline of the cavity, and while being treated the blanks are clamped sufficiently tight between the pressure roll and the cavity so that the blank is fed by the movement of the rolls. Certain kinds of blanks, such as box toes for example, are skived or beveled only on the edge which is united with the vamp of a shoe. The cavity for this type of blank has an active portion shaped to bevel the front edge of the blank, and a passive portion which is of such dimensions that, when the blank is compressed therein, it will be held out of the field of action of the treating tools. The surface of the passive portion of the cavity is such that the distance be tween it and the face of the operating tools is generally greater than the thickness of the blank being treated, so that the pres sure roll will act only to holdthe blank out of the field of action of the treating tools, but will not get an effective grip on the blank to feed it. For this reason, the blank often slips between the rolls and is improperly skived and spoiled.

The primary object of the present invention is to provide a cavity roll for blank fitting machines by which the blanks will be properly supported during the treating operation and accurately fed through the rolls.

' In accordance with this object, one feature of the invention contemplates the provision in a blank fitting machine having a Specification of Letters Patent.

Patented Aug. 7, 1917.

Serial No. 67,419.

roll with a blank cavity therein, and a pressure roll for forcing the blank into the cav- 1ty, of yieldable means within the cavity to cooperate with the pressure roll to grip and feed the blank.

In the preferred form of the invention, the cavity of the cavity roll is enlarged and a yieldable rubber pad placed therein. The pad will allow the blank to be properly seated for the treating operation and will act to grip the blank and assist in feeding it. While this type of cavity roll is especially advantageous in blank skiving or blank molding machines, the invention is not limited to use in these machines, but the application of a blank gripping and feeding device within the cavity of a cavity roll is believed to be broadly new. Accordingly, another feature of the invention contemplates the provision of a cavity roll having a body with a cavity formed therein, of a yieldable blankgripping device mounted in the cavity.

The invention also includes certain .further features of construction and combination of parts which are hereinafter described and set forth in the claims.

The various features of the invention are illustrated in the accompanying drawings, in which Fig. 1 is a view in vertical section showing a cavity roll, blank skiving machine embodying applicants invention; Fig. 2 is a side elevation of the improved cavity roll; Fig. 8 is a vertical transverse section of the cavity roll taken on the line 33 of Fig 2; and Fig. 4 is a vertical longitudinal section of the cavity roll taken on the line 4E1 of Fig. 3.

The skiving machine illustrated in the drawings is substantially the same in the construction, arrangement and mode of operation 'of its various parts as the machine shown in the patent to Scott No. 969,987, patented September 13, 1910. This machine is provided with a positively driven cavity roll 10 and pressure roll 12 which support the blank and assist in feeding it against a stationary skiving knife 14:. The skiving knife has a cutting edge which extends close to the line of contact of the cavity and pressure rolls with the blanks and trims off portions of the blank extending radially beyond a predetermined radius from the center of the cavity roll. The blanks are held in a stack in a magazine 18 and are advanced to the bite of the cavity and pressure rolls by means of a feed slide 20 which is operated in timed relation to the operation of the cavity and pressure rolls. A follower 22 acts on the stack of blanks in the magazine and holds them down on the bedplate 2% so that the blanks are successively fed to the cavity and pressure rolls one at a time.

In the usual skiving operation the blank is held in the cavity of the die roll by the pressure roll, which also acts to grip the blank sufficiently so that the operation of the rolls will feed the blank. With certain blanks, such as box toes, the blank is pre liminarily died out to its finished shape and only the front edge of the blank is skived. The cavity for treating this kind of blank has an active portion which supports that part of the blank to be skived, and a passive portion which supports the part of the blank which is not skived. The passive portion of the cavity should have an area slightly greater than the area of the unskived portion of the largest blank to be treated so as to entirely receive the unskived portion of the blank, and must have a. proper radial depth to hold the blank out of the field of operation of the treating tools. The radial depth of the cavity, also, should be such that it will accommodate blanks of different thicknesses and still allow the'blanks to be clamped into the cavity by the pressure roll with sufficient pressure to be properly fed.

To the accomplishment of these results, the cavity roll 10 shown in the drawings consists of a hollow cylinder having the cavity 16 formed on'its periphery. The

. cavity 16 has an active portion 26 and a passive portion 28. The active portion of the cavity has a rigid face and is adapted to support the blank while it is being skived or beveled, and in the cavity illustrated, this skiving or bevel will extend only across'the front edge of the blank. To form the passive portion of the cavity, the roll is provided with a comparatively deep radial recess in which is secured a rubber pad 30. To securely hold the pad in position, one or more strips of fabric 32 are fastened in the bottom of the recess by cement, and the pad 30 cemented to the fabric. The outer peripheral face of the rubber pad 30 extends radially beyond the surface upon which a blank supported would not be skived by the skiving knife, but the pad being yieldable will be compressed by the action of the pressure roll and allow theblank to be seated deeply enough in the cavity to be held out of the field of action of the knife. In compressin the blank into the cavity against the ru ber pad, the blank is securely clamped between the pad and pressure roll so that'it will be fed accurately through the machine.

The use of a yieldable member in the cavity is especially advantageous, in thatit readily adapts itself to the various thicknesses of blanks, and the same roll can be used for practically any thickness of blank. When working on different kinds of blank material, the character of rubber used for the pad 30 may be changed; for instance, using a soft, easily compressible rubber on hard, thick blanks, and a comparatively rigid rubber on thin, soft blanks.

The active portion 26 and passive portion 28 of the cavity have a width longitudinally of the roll slightly greater than the widest blank to be treated, and a combined circumferential length slightly greater than the longest blank to be treated, In this way, one cavity can be used for practically all types of blanks. The bevel of the active portion 26 is gaged with reference to the skivingknife, and is substantially the same for all of the blanks,

The operation of the machine is as follows: A stack of blanks is placed in the magazine and the machine set in operation. The feed stroke of the feed slide 20 presents a blank to the die and pressure rolls so that the blank will accurately register with the cavity 16 in the die roll. part of the movement of the blank while the active portion 26 of the cavity is passing the skiving knife, the front edge of the blank will be skived. After the portion 26 leaves the blank, the blank is seated upon the rubber pad 30 and pressed far enough into the cavity so that it will be skived the knife 14;. lVhile the blank is traveling across the active portion 26, it is clamped with sufficient pressure between the bottom of the active portion 26 of the cavity and the pressure roll, to be fed by the movement of the rolls. When traveling across the passive portion of the cavity, the blank is clamped between the rubber pad 30 and the pressure roll, which gives an eflicient grip on the blank so that it is fed by the movement of the rolls. This construction allows a blank to be entirely held within the cavity and still be accurately fed between the die and pressure rolls.

In the preferred form of the invention rubber has been employed as a yielding member within the cavity of the die roll for gripping and feeding the blank. The invention, however, is not limited to the use of rubber, since, obviously, many diflerent types of yielding devices might be employed in the cavity of the die rol Having thus described my invention,-

what is claimed as new, is z- 1. A blank fitting machine, having, in combination, a roll having a cavity for supporting blanks to be treated, a pressure roll for feeding the blanks and for forcing them into the cavity, a yieldable means within During the first the cavity for clamping the blanks against the pressure roll to assist in feeding, means to operate the rolls, and mechanism to feed blanks to the rolls in timed relation to the operation of the rolls.

2. A blank fitting machine, having, in combination, a roll having a cavity for supporting blanks to be treated, a pressure roll for feeding the blanks and for forcing them into the cavity, a yieldable means within the cavity for clamping the blanks against the pressure roll to assist in feeding, means to skive the blanks, means to operate the rolls, and mechanism to feed blanks to the rolls in timed relation to the operation of the rolls.

3. A blank fitting machine, having, in combination, a roll having a cavity for sup porting blanks to be treated, a pressure roll for forcing the blanks into the cavity and for feeding them, a rubber pad in the cavity to clamp the blanks against the pressure roll, means to operate the rolls and'mechanism to feed blanks to the rolls in timed relation to the operation of the rolls.

4. A cavity roll for blank fitting machines comprising a rigid body, a cavity formed in the body, and a yieldable device mounted within the cavity.

5. A cavity roll for blank fitting machines comprising a rigid body, a cavity formed in the body, and a rubber pad secured in the cavity.

6. A cavity roll for a blank fitting machine, comprising a body having a cavity formed therein, a predetermined portion of the face of the cavity being rigid and the remainder of the face of the cavity being yieldable.

7. A cavity roll for blank fitting machines comprising a body, a cavity formed in the body, a fabric securedin the bottom of the cavity and a rubber pad united with the fabric.

8. A cavity roll for blank treating machines comprising a body, a cavity formed in said body consisting of an active portion having a surface arranged radially with reference to the center of the roll for supporting a blank so that it will be acted upon, and a passive portion having a surface arranged radially with reference to the center of the roll to support the blank so that it will not be acted upon, and means in the passive portion normally projecting radially beyond a part of the surface of the active portion which will grip the blank and assist in feeding it.

9. A cavity roll for blank treating machines comprising a rigid body, a blank positioning cavity formed therein having an active portion and a passive portion, the passive portion of said cavity being of greater length and width than the portion of the blank to be treated therein, and means mounted in the passive portion of the cavity to assist in feeding the blank.

10. A cavity roll for blank treating machines comprising a body, a blank positioning cavity in said body consisting of an active portion for treating only the front edge of the blank, and a passive portion which is wider and longer than the untreated portion of the blank, and means within the passive portion of the cavity to grip the blank and assist in feeding it.

11. A blank fitting machine, having, in combination, a cavity roll having a rigid body; blank treating mechanism having its acting face supported adjacent said roll, a cavity in said roll having an active portion, a part of the surface of which is separated from the acting face of the treating mechanism when opposite thereto by a distance less than the thickness of a blank, a passive portion, the surface of which is separated from the acting face of the treating mechanism when opposite thereto by a distance greater than the thickness of a blank, a compressible member in said passive portion the surface of which is normally separated from the acting face of the treating mechanism when opposite thereto by a distance less than the thickness of a blank; and means for forcing a blank into the cavity.

ELMER E. LANE.

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