US1983129A

US1983129A - Cloth cutting machine

Info

Publication number: US1983129A
Application number: US620748A
Authority: US
Inventors: Jr John B Gury
Original assignee: J B GURY Manufacturing CO
Current assignee: J B GURY Manufacturing Co
Priority date: 1932-07-05
Filing date: 1932-07-05
Publication date: 1934-12-04
Anticipated expiration: 1951-12-04

Description

Dec. 4, 1934. J. B. GURY, JR'

CLOTH CUTTING MACHINE Filed July 5,. 1952 Fig.1.

2 SheetsSheet l "E -mum- IIIIIIIIIII-IIIIIIIIIII will! w; 1, 712 a I? J. B. GURY, JR v 1,983,129

CLOTH CUTTING MACHINE Dec. 4, 1934.

Filed July 5, 1932 2 Sheets-Sheet 2 Patented Dec. 4, 1934 PATENT OFFICE 1 1,983,129 CLOTH CUTTING MACHINE John B. Gury, In, St. Louis, Mo., assignor to J; B. Gury Mfg. (30., St. Louis, Mo., a corporation of Missouri Application July 5, 1932, Serial No. 620,748

15 Claims. (Cl. 164-76) This invention relates to cloth cuttingma-- chines, and has special reference to an improved sharpener for the rotary blade of a cloth cutter. An object of the invention is to equip a cloth cutter havinga rotary blade with spaced sharpener members adapted to operate against opposite sides of the marginal cutting edge of the ro- 10- sharpener members.

Another object of the invention is to provide an improved support and operating means for the sharpener members whereby said members are moved in a straight line toward and away from ji-the blade; so that the sharpener members engage on opposite sides of the cutting edge of the blade in the same relative relationship irrespective of the extent to which the blade may becomeworn. 1 I H i "Another object of the invention is to provide an improved operating means for the sharpener members.

1 Another object of the inventionis'to provide an improved guard device adapted to extend 1 downwardly beyond the front of the circular blade, and means for supporting the guard in different adjusted positions.

Another object of the invention is to provide an improved mounting for supporting the rotary sharpener members for independent relative rotation. 1 I

1 Various other objects and advantages will appear from thefollowing description, reference being made to the accompanying drawings, in 3j.which-- 1 Fig. 1 is a plan view of a cloth cutter embodving the present invention.

Fig. 2 is a side elevation looking toward the circular cutter.

Fig. 3 is a side elevation showing the opposit side of the machine. I

Fig. 4 is a front elevation.

Fig. 5 is a slightly enlarged sectional view showing the sharpenermembers, and the devices by iwhich they are mounted and supported for independent rotation. I

Fig. 6 is across sectional view on the line 6'6 of Fig. 5.

Fig. 7 is a diagrammatic view illustrating the is embodied comprises a base 1 supportedby rollers 2 adapted to operate along a table or other surface upon which the cloth to be cut is sup-1 ported.

A frame, comprising an upright portion 3 and a socket 4, is attached to the base 1. A spiral gear wheel 5 is rotatively supported by the frame 3 and is covered by a plate 6. The spiral gear wheel 5 engages and rotates a pinion '7 in connection with the rotary circular cutting blade 8. The motor frame 9 has a part 10 extending into the sooket4 and the shaft of said motor is geared to the spiral gear 5, so that when the motor is running the gear 5 is rotated and said gear rotates the gear 7 and thereby the circular cutting disc 8. l

A handle 11 is attached to the socket 4 and constitutes means for manually moving the machine along the table or support on which the machine is mounted and while the circular cutter 8 is rotating. v

A bracket arm 12 extends upwardly and forwardly from the upper portion of the frame 3 and is formed with a pair of spaced flanges 13, to the edges of which a retaining plate 14 is detachably secured by fasteners 15;

A support16'is'mounted for sliding movements in the space enclosed by the bracket '12, the flanges 13 and the plate 14. This supportlfiinclines upwardly and forwardly and is formed on its lowerend with a split bearing 17. A stem 18 extends through the part '19 of the split bearing and screws into the part20 of said bearing and is operative to clamp the bearing upon a tubular bushing 21 or to release said bearing from clamping engagement on said bushing so as to permit the bushing to beremoved and replaced, as desired. i

"The axis of the bushing 21 is inclined in two directions with respect to theaxis of the circular cutter 8. As shown, the bracket arm 12 is at-. tached to the opposite side of the frame 3 from thecircular cutter 8 and the sliding support 16 is mounted on the opposite side of the bracket arm from the cutting disc. laterally beyond the sliding support 16 on the side opposite from'the circular disc 8 and the axis of said'bearing 1'7 inclines forwardly and also inclines downwardlyfrom the support 16,

the axis of said bearing being thus inclined in 5 two directions with respect to the .axis of the circular disc 8.

An abrading cup-shaped sharpener member, comprising a circular tapered wall 22 and an end wall 23, is mounted on the threaded end of a 116 The bearing 17 projects 5 sleeve 24 rotatively supported within the bushing 21. A circumferential flange 25 formed on said sleeve 24 abuts against the end of the bushing 21 and constitutes an abutment for the end wall 23 of the sharpener member mounted thereon. A nut 26 is screwed on the end of the sleeve 24 against the wall 23 and thus cooperates with the flange 25 to clamp the wall 23 in connection with the sleeve 24.

An axle member 27 is formed with a circumferential rib 28, constituting an abutment for one end of a hub 29 mounted on said axle member. The hub 29 is formed with a circumferential flange 30 against which the'end wall 31 of a cupshaped sharpener member is clamped by a nut 32 screwed on said hub 29. The tapered circular wall 33 of this sharpener member is separated from the end of the circular wall 22 of the cooperating sharpener member by a space 34 designed and adapted to receive the marginal portion of the circular cutter disc 8 when the sharpener is in use. A screw 35 is screwed into the end of the axle member 27 and holds the hub 29 on said axle member for independent rotation about the axle member 27.

A nut having a threaded hole therethrough and comprising a. body portion 36 and an exteriorly threaded extension 37 is screwed on the threaded end of the axle member 2'? and abuts against the end of the bushing 21. The threaded extension 37 of this nut is screwed into the threaded end of the sleeve 24, thus securing the axle member 27 to said sleeve for rotation therewith, leaving the sharpener member 3133 free to rotate independently of the axle 2'7 and independently of the sharpener member 22-23. Since the hub 29 is not capable of longitudinal movement along the axle member 27 but is held from longitudinal movement by the flange 28 and the screw 35; and since the axle member 27 is incapable of longitudinal movement with respect to the sleeve 24, it is clear that the two sharpener members are incapable of movement toward and away from each other but are held in spaced relationship and separated by a space 34 that will receive the peripheral cutting edge of the circular cutter 8. Since the axis of the bearing 1'? is inclined in two directions with respect to the axis of the circular cutter 8, it is clear that the axis of the sharpener device, comprising the two sharpener members, is also inclined in two directions with respect to the axis of the circular cutter 8.

A spring 38 has its upper end connected with the plate 14 and its lower end connected with the sliding support 16. The power of this spring is utilized'to uphold the sliding support 16 in its uppermost position, but said spring will yield to permit the support 16 to be moved downwardly to engage the cutter members with the circular cutting blade. A lever 39 has one end extending over a pin 40 projecting laterally from the hearing portion 20 and the opposite end of said'lever is mounted on a pivot 41. An arcuate rack 42 is formed in connection with the pivoted end of the lever 39 and engages an arcuate rack 43 formed on the adjacent end of a lever 44 mounted on a pivot 45. The pivots 41 and 45 are supported by the frame 3. The lever 44 is formed with a handle portion 46 on its free end. In the construction and arrangement shown, depression of the handle 'end 46 of the lever 44 will operate the lever 39 in a direction to move the sliding support 16 downwardly in opposition to the power of the spring 38. This movement of the sliding support 16 is in a straight line and since the axis of the two sharpener members is inclined in two directions with respect to the circular cutting blade 8, it is clear that the edge of said cutting blade will be received in the space 34 and will be engaged at circumferentially spaced points by the ends of the

walls

22 and 33 of the respective sharpener members. Engagement of the

walls

22 and 33 of the respective sharpener members with circumferentially spaced portions of the circular cutting disc is diagrammatically illustrated in Figs. 7 and 8, it being clear that the points of engagement of said cutting members with the circular blade are spaced circumferentially and are not on directly opposite sides.

This novel mounting of the cutting members constitutes a feature of unusual convenience in a device of this type. By merely loosening the clamping screw 18, the clamping engagement of the bearing 17 on the bushing 21 is released and the sharpener device may be removed as a unit from the sliding support 16 therefor. The various parts and features of the sharpener device are separate and detachable, so that the sharpener device may be disassembled and any damaged or broken parts may be easily repaired and replaced.

Another important feature of the invention is the direct straight movement of the sharpener device toward the circular cutting blade. This engages the sharpener members with the cutting blade in the same relationship irrespective of the extent to which these parts may become worn. A better grinding and sharpening action and effect is obtained than is possible by an arcuate or other movement of the sharpener device toward the blade.

A guard comprises a rod '47 mounted for longitudinal sliding movements in spaced bearings 48 detachably secured to the bracket 12 by fasteners 49. A spring plate 50 is mounted between the bearings 48 and frictionally engages the guard 4'7 with sufiicient pressure to support and sustain said guard in any of .its longitudinally adjusted positions. An enlarged head 51 is formed on the lower end of the guard 47 and is designed and adapted to operate above the cloth or the plies of cloth being cut by the machine. A collar 52 is mounted on the guard 47 and is equipped with a clamping set screw 53 operative into and out of clamping engagement with the guard 47 to secure the collar in any adjusted position along said guard and thus limit extent of downward movement of the guard through the bearings 48. After the machine has been moved to the extent desired to cut the cloth, it is apparent that the upper plies of cloth are cut'to a greater extent than the lower plies which extend under the forward portion of the circular blade. When the machine is moved to the extent desired, the guard 47 is raised and the cloth may be raised to bring the lower plies of cloth opposite the forward edge of the cutting blade and thereby cut all of the plies of cloth to the same extent and to the same distance.

It is now clear that this invention obtains allof its intended objects and purposes most emciently and satisfactorily. The construction and arrangement of the parts comprising the invention and the relationship thereof may be varied within the scope of equivalent limits without departure from the nature and principle of the invention. I do not restrict myself in any unessential particulars, but what I claim and desire to secure by Letters Patent is:

Bil

451 and thereby said sharpener members in a straight blade to cause the periphery of said blade to extend into the-space between and engage circumferentially spaced points respectively with said membersL- 2. In a machine of the character described; a rotary circular blade,- a pair of spaced rotary sharpener members supported on an axisinclined intwo directions with respect to the axis of said bladeand separated by anintervening spacey; re-' silient means supporting said sharpener. members away from said blade, and mechanism for moving said sharpener members toward said blade in opposition to said resilient means to place said sharpener members in contact with opposite sides of said blade in circumferentially spaced positions.

3 In a machineof the character described having a rotary circular blade and mechanism for rotating said blade, a pair of rotary sharpener members mounted for rotation about an axis inclined in two directions with respect to the axis of said blade and separated by an intervening space, resilient means supporting said sharpener members away from said blade, and mechanism for moving said sharpener members in a straight line in opposition to said resilient means to position to contact with opposite sides of said blade at circumferentially spaced points of contact.

4. In a machine of the character described, a rotary circular blade, a sliding support movable in a straight line toward and away from said blade, means for holding said support away from said blade, a pair of rotary sharpener members carried by said support for rotation about an axis inclined in two directions with respect to the axis of said blade and separated by an intervening space, and means for moving said support line toward said blade to position to place said sharpener members in contact with opposite sides of said blade at circumferentially spaced points of contact.

5. In a machine of the character described, a supporting frame, a rotary circular blade supported by said frame, a slide supported by said frame for movement in a straight line toward and away from said blade, a bearing supported by said slide and having an axis inclined in two directions with respect to the axis of said blade, a pair of rotary sharpener members, means mounted in said bearing for rotatively supporting said sharpener members for rotation on said axis that is inclined in two directions with respect to the axis of said blade, means for supporting said slide in position in which said sharpener members are out of contact with said blade, and means for moving said slide to engage said blade in the space between said sharpener members.

6. In a machine of the character described, a rotary circular blade, a bearing having an axis inclined with respect to the axis of said blade, a sleeve member rotatively mounted in said hearing, a sharpener member supported by said sleeve member for rotation therewith, an axle member supported by said sleeve member, a sharpener member supported by said axle member and separated from said first sharpener member by an intervening space, both of said sharpener members beingrotative about said inclined axis, and mechanism for moving said sharpener members to engage circumferentially spaced portions of opposite sides of said blade.

-7 Ina machine of the character described, a bearing, a bushing mounted in said bearing, means for clamping said bearing on and releasing said bearing from clamping engagement with said bushing, a sleeve rotative in said bushing, means forholding said sleeve in said bushing, an axle member rotatively supported by said sleeve, sharpener members supported by said sleeve and. said axle member respectively, means for holding said sharpener members in spaced relationship, and means for moving said sharpener membersto and from effective positions.

8,. A machine'of the character described having a circular blade rotative about a horizontal axis, a support having an axis inclined in two directions with respect to the axisof said blade, a sharpener device mounted on said support and having a space adapted to receive the marginal cutting edge of said blade, resilient means holding said support away from said blade, and mechanism for moving said support in opposition to said resilient means to position in which the peripheral cutting edge of said blade extends into said space and in which said sharpener device engages opposite sides of said blade at circumferentially spaced points of contact.

9. In a machine of the character described, a circular blade rotative about a central axis, a support having an axis inclined in two directions with respect to the axis of said blade, a rotary sharpener device mounted on said support and having a space for receiving the peripheral cutting edge of said blade, resilient means holding said support away from said blade, and mechanism for moving said support and thereby said sharpener device in opposition to said resilient means in a straight line into contact with said blade in position in which the peripheral portion of said blade extends into said space.

10. In a machine of the character described, a circular blade rotative about a central axis, a support having an axis inclined in two directions with respect to the axis of said blade, a rotary sharpener device mounted on said support and having a space for receiving the peripheral cutting edge of said blade, mechanism for moving said support and thereby said sharpener device in a straight line into contact with said blade in position in which the peripheral portion of said blade extends into said space and in which said sharpener device engages opposite sides of said blade at circumferentially spaced points, and means for moving said support and said sharpener device out of engagement with said blade.

11. In a machine of the character described, a rotary circular blade, a sharpener device supported on a single axis of rotation, manual means for moving said sharpener device in a straight line into and out of engagement with opposite sides of said blade equidistant from the periphery thereof and at circumferentially spaced points of contact, and an actuator other than said manual means for moving said sharpener device away from said blade.

12. In a machine of the character described, a rotary circular blade, a sharpener device supported on a single axis of rotation, a spring supporting said sharpener device out of engagement with said blade and operating to move said sharpener device from engagement with said blade, and mechanism for moving said sharpener device in a straight line into engagement with opposite sides of said blade equidistant from the periphery thereof and at circumferentially spaced points of contact.

13. In a machine of the character described, a blade supported for rotation about a centralaxis, a rotary supporting member mounted for rotation about an axis inclined in two directions with respect to the axis of said blade, asharpener device mounted on said supporting member and having a space for receiving the marginal cutting edge of said blade, and mechanism for moving said supporting member in a straight line to position in which the marginal-cutting edge of said blade extends into said space and in which position said sharpener device simultaneously engages opposite sides of said blade along lines'o'f contact ofequal width and at circumferenti'ally spaced points-of contact.

14. In a machine of the character described, a blade supported for rotation about a central axis, a rotary supporting member mounted for rotation about an'axis inclined in two directions with respect to the axis of said blade, a sharpener device mounted on said supporting member and having aspace for receiving the marginal cutting edge of said blade, mechanism'for moving said supporting member in a straight line to position in which the marginal cutting edge of said blade extends into said space and in which position said sharpener device simultaneously engages opposite sides of said blade along lines of contact of equal width and at circumferentially spaced points of contact, and a removable support in which said supporting member is mounted.

1 5. A machine of the character described comprising a rotary circular blade, a pair of spaced rotary sharpener members supported on the same axis of rotation, mechanism for moving said sharpener members in a straight line to contact said sharpener members simultaneously with opposite sides of the marginal portion of said blade and extending from the periphery to points equidistant from the periphery of said blade in circumferentially spaced relationship, and automatic means for moving said sharpener members from said blade.

JOHN B. 'GURY, JR.