US2805431A

US2805431A - Lasting machine

Info

Publication number: US2805431A
Application number: US524875A
Authority: US
Inventors: Schwabe Herman
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-07-28
Filing date: 1955-07-28
Publication date: 1957-09-10
Anticipated expiration: 1974-09-10

Description

Sept. 10, 1957 H. SCHWABE LASTING MACHINE 3 Sheets-Sheet 1 Filed July 28, 1955 Pll Fig. l

INVENTOR.

Sept. 10, 1957 v H. SCHWABE 2,805,431

LASTING MACHINE Filed July 28, 1955 3 Sheets-Sheet 2 IN V EN TOR.

j /gum 4 1%? M'- g ym Sept. 10, 1957 H; scHwABE LASTING MACHINE w 3 Sheets-Sheet 3 Filed July 28, 1955 IN VEN TOI Q.

UnitedStates Patent 2,805,431 LASTING MACHINE Herman Schwabe, New York, N. Y.

Application July 28, 1955, Serial No. 524,875 12 Claims. (Cl. 12-83) This invention comprises a new and improved lasting machine capable of general application and particularly useful for lasting or wrapping a flexible cover about the marginal edge of a platform sole or midsole.

An Object of the invention is to provide a machine of compact and etficient construction, convenient for the operator in its action on the shoe and with provision for adjustment of its operating instrumentalities so that materials of different character may be handled to the best advantage.

With this object in view an important feature of the machine consists in a novel cooperative working combination of instrumentalities which include feed rolls rotatable about vertical axes, a guide roll partly underlyingone of the feed rolls, a heated wiper disk arranged to act on'the lasting margin as it leaves the feed rolls and preferably also a second gage roll partially underlying the wiper disk.

The feed rolls are pressed yieldingly toward each other into engagement with the lasting margin and rotate continuously in the lasting operation. They are mounted to permit relative adjustment in the direction of feed and thereby to locate the rolls in the most effective relation to each other and to the wiper disk. In the preferred construction one of the feed rolls is mounted in an antiliary bracket connected to the machine frame by a pivot shaft having an eccentric portion, thus providing for the desired adjustment.

Since the machine is intended for use in connection with upper materials of considerable variation in their characteristics and with correspondingly difierent adhesives, another feature of the invention comprises a heated wiper disk effective in its operation either to cause rapid setting of the adhesive or to convert it to tacky condition as the case may be. In its preferred construction the wiper is provided with a cylindrical hub arranged to fit into a semi-cylindrical recess provided for that purpose in an electrically heated unit. Heat is thus transferred effectively to the area of contact in the'wiper disk with the work.

Other features of the invention comprise a novel arrangement of gauge rolls for insuring the proper presentation of the work to the operating instrumentalities of the machine and constructional features 'by which the feed rolls are subjected to yielding pressure in all positions of adjustment and the wiper disk is maintained in yielding rotary engagement with the over-wiped lasting margin.

These and other features of the invention will be best understood and appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawings in which:

Fig. 1 is a view of the machine in front elevation,

Fig. 2 is a corresponding view in side elevation,

Fig. 3 is a plan view on the line 3-3 of Fig. 1,

Fig. 4 is a fragmentary view in perspective of the wiper disk and heater shown in exploded relation, and a Fig. 5 is a fragmentary view of parts shown in Fig. 1.

The operative instrumentalities of the machine comprise a pair of knurled rolls, and 11 arranged to engage yieldingly and feed the lasting margin of the work,

' gauge roll 12 partially underlying the rear or an edge ice inner knurled roll 10 of the pair, a heated wiper disk 13 which engages the lasting margin as it passes beyond the rolls 1i) and 11 and lays it progressively over the insole or other element of the shoe bottom, and an auxiliary edge gauge roll 15. These elements are shownin operative relation in Fig. 3, the outer knurled roll 11 being yieldingly urged toward the inner knurled roll 10 and the wiper disk 13 being mounted to permit limited heightwise yielding under spring pressure.

The organization of these elements in the machine frame will now be described. The main frame 20 is shaped to provide suitable bearings and points of support for the moving parts of the machine and includes an attaching flange 21 by which the frame may be bolted to the corresponding vertical face of a column which supports the machine at convenient height for presentation of work by the operator. Bolted to the frame and forming a part thereof is a hollow casing 22. The frame 20 projects horizontally from its flange 21 and overhangs the operating instrumentalities of the machine.

Journaled in the frame 20 is a horizontal shaft 23 having a pulley 24 at its rear end and carrying at its forward end a helical gear 25. This meshes with a gear 26 fast to the upper end of a vertical shaft 27 journaled I in a boss 28 formed integrally with the frame and extending downwardly from the body thereof. At its lower end the shaft 27 carries a gear 29 and the rearmost knurled roll 10 which, it will be seen, is driven about a fixed vertical axis by rotation of the pulley 24 through the connections just described.

The gear 29 on the shaft 27 is arranged to mesh with a spur gear 36 fast upon a vertical shaft 31 rotatably mounted in a bracket 32 pivotally supported upon the frame of the machine by a vertical pivot shaft 33, best shown in Fig. 5. This mounting permits the bracket to swing outwardly at its right side as seen in Fig. l, carrying with it the front knurled roll 11 and thus permitting the two rolls to be separated for the introduction of the work. The bracket 32 is perforated for the free passage of a fixed bolt 34 carrying a nut and disk at its outer end between which and the bracket 32 is interposed a stiff compression spring 35. The bracket has an outwardly extended boss 36 at its free side in which is formed a socket for a horizontal rod 37 having a spherical head. At its rear end the rod 37 is similarly connected to a bell crank lever 38 pivotally'mounted on the rear portion of the frame 20 and connected to a treadle rod 39. It will be apparent that by deperssing this treadle rod the bracket 32 may be temporarily rocked outwardly, separating the knurled rolls 10 and 11 and the

meshing gears

29 and 39 by which the outer roll is driven. When the treadle rod is released the spring 35 immediately restores the bracket 32 to its operative position, meshing the gear 30 with the driving gear 29 and holding the knurled roll 11 yieldingly against the work interposed between it and the roll 10.

The wiper disk 13 is secured to the lower end of a vertical shaft 40 journaled in the frame 20 and passing upwardly through a boss 41 formed as an integral part of the frame. Above the boss 41 the shaft 40 carries a pulley 42 by which it is driven through a belt from any suitable source of power. In the upper end of the shaft 40 is formed a socket for a ball 43 which constitutes a thrust bearing and it is pressed downwardly by a flanged rod 44 mounted in the casing 22 and surrounded by a compression spring 45.

The wiper disk 13 is provided upon its lower face with a series of straight radial ribs 14 shown in dotted lines in Fig. 3. Above the disk it is provided with a cylindrical hub 50 and above that a circular flange 51. The hub 50 is designed to fit and rotate within a semi-circular re cess formed in the heater 16. The heater is formed in- I tegrally with a rectangular body 52 recessed to receive a heating unit 53. The body of the heater is secured to a shelf 49 formed as an integral part of the frame through the medium of a land 48 whichprojects slightly above the body 52 and so provides an insulating space between it and the shelf 49. The circular flange 51 of the wiper overlies the heater 1 6 and the wiperdisk underlies it so that highly effective heat transfer is insured from the heater to the wiper disk.

The edge gauge roll 12 is rotatably mounted in the forward end of an arm 54 adjustably secured to an angular bracket 55 fast to the boss 28 of the frame. Similarly the edge gauge roll is rotatably mounted in the forward end of an arm 56 also adjustably mounted on the bracket 55. a

I The shaft 31 is mounted in ball bearings (not shown) in the bracket 32 and the outer knurled roll 11 is fast upon .its outer end. In order to adjust the relative position of the two rolls 10 and 11 the pivotshaft 33 of the bracket 32 is provided with an eccentric body portion and end bearings which are rotatable in fixed portions of the frame. The head at the lower end 'of the shaft 33 is journaled in the shelf portion 49 of the frame and has a screw driver slot by which it can be turned, the heater body 52 being temporarily removed for that purpose. A set screw is provided for holding the shaft in the selected position of adjustment.

It will be apparent that by the means above described the roll 11 may be shifted toward the left or right from its position shown in Fig. ,3 or forwardly or rearwardly with respect to the direction of feed. Thus the action of the rolls may be regulated to secure the best results in dealing with upper stock of various characteristics. The range of permitted adjustment is not sufiicient to interfere with the meshing of the

gears

29 and 30 and of course the aperture in the bracket for the bolt 34 is sufiicient for clearance in all positions of bracket adjustment. The compression spring 35 is therefore effective throughout the full range of adjustment.

The operation of the machine will be apparent from the foregoing description but may be summarized as follows. The feed rolls 10 and 11 having been first adjusted for the upper stock in hand the machine is set in operation and the two rolls driven from the pulley 24 through the connection above described. They are pressed yieldingly together by the action of the spring 35 and rotate at substantially the same linear speed, the gear 29 being slightly larger-than the gear 30 and the feed roll 11 being somewhat smaller in diameter than the feed roll 10. The lasting margin is gripped between these two rolls as shown in Fig. 3 and advanced in substantial vertical position. Meanwhile the edge of the upper is pressed against the gauge roll 12 which thus governs the in and out position of the Work. Meanwhile the wiper disk 13 has been heated and is now driven independently through the pulley 42 engaging the lasting margin as it leaves the rolls 10 and 11 and over-wiping it in caterpillar fashion upon the insole or other part of the shoe bottom. As already explained the wiper disk is in effect backed up by the spring 45 so that the over-wiped margin is subjected to the yielding action of the ribs 14 of the .wiper disk. The over-wiped margin is at the same time heated by the hot wiper disk and the adhesive action of the cement applied thereto onto the shoe bottom is expedited. 7

Having thus disclosed my invention what I claim as new and desire to secure by Letters Patent is:

1. A lasting machine comprising inner and outer driven feed rolls for advancing the lasting margin, an edge gauge roll underlying the inner feed roll, aheated wiper disk partially underlying the said inner feed roll in position to engagethe lasting margin as it leaves the feed rolls, and a second .edge gauge roll partially underlying the Wiper disk.

2. A lasting machine comprising inner and outer driven feed rolls for advancing the lasting margin of the work, means for urging the rolls toward each other, means for adjusting one roll with respect to the other in the direction of work feed, and a wiper for laying over the margin as it leaves the feed rolls.

3. A lasting machine comprising 'a frame having a vertical shaft journaled therein with a feed roll at its lower end, a bracket mounted on the frame by a vertical pivot shaft having an eccentric portion, a second Vertical shaft journaled in said bracket and bodily adjustable therewith and a second feed'roll mounted at its lower end.

4. A lasting machine as describedin claim 3 in which the bracket is apertured and a shaft projects from the frame with clearance through the aperture and carries a compression spring engaged with the bracket.

5. A lasting machine as described in claim 3 in which the vertical shaft in the frame and the vertical shaft in the bracket are provided with meshing gears.

6. A lasting machine of the class described having a pair of feedrolls rotatable about substantially vertical.

axes, in combination with a heated wiper disk rotatable about a vertical axis in a plane below the level of the feed rolls.

7. A lasting machine as described in claim 6 in which the wiper disk is provided on its lower face with radial straight ribs.

8. A lasting machine of the class described having a pair of feed rolls rotatable about substantially vertical axes, in combination with a heated wiper disk rotatable about a vertical axis in a plane below the level of the feed rolls, the wiper having a cylindrical hub with a concentric circular flange at its upper end, and a heater having a cylindrical recess fitting the rotary hub of the wiper and faces engaged respectively by the disk and the flange of the wiper.

9. In a lasting machine a pair of cooperating feed rolls rotatable about vertical'axes for advancing the lasting margin of the work, in combination with a wiper rotatable about a vertical axis adjacent the feed rolls, the wiper having a disk underlying one of said feed rolls and a hub of reduced diameter providing clearance for said feed roll, and a heater recessed to receive a portion of the hub.

'10. A lasting machine of the class described comprising a pair of feed rolls yieldingly pressed together and rotatable about substantially vertical axes with their bottom faces at the same level, a wiper disk rotatable beneath and substantially in contact with the bottom face of one feed roll, and a pair of independently adjustable edge gauges located in operative relationto the feed rolls and wiper.

l1. In a lasting machine of the class described, an overhanging frame carrying the operative instrumentalities of the machine which comprise a pair of feed rolls rotatable about substantially vertical axes, in combination with a wiper disk rotatable abouta vertical axis in a planebelow the level of the feed rolls, a vertical wiper shaft journaled in the overhanging frame and carrying the wiper disk at its lower end, and a separate springloaded rod arranged to bear continuously upon the upper end of the Wiper shaft.

12. A lasting machine as described in claim 11 in which the frame has bearings for the wiper shaft and supports