US1836941A - Machine for grinding and sanding rubber printing rollers - Google Patents

Description

Dec. 15, 1931.,

G. c. SPKZER 1,836,941

MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7, 1950 4 sheets-sheet 1 A F/oor L/ms l N V5 N T OR Geo v52 6. SPICE/Q A TTOR/VE Y Dec. 15,, 1931. G C SPICER 1,836,941

MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7, 1930 4 sheets sheet 2 1N VENTOR GEO VEE C, 5p/cE e A TTORNEY Dec. 15, 1931. G. c. SPICER MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7, 1950 4 Sheets-Sheet 3 IN VENTOR G/eovE/e C 5p/csf BY a,

A TTORNEY @Q. 35, E931. G, 3, SPICER 1 836.94];

' MACHINE FoR GRINDING AND SANDING RUBBER PRINTING ROLLERS Filed Jan. 7. 1930 4 Sheets-Sheet 4 INVENTOR G/E'ovfie C. SPICE)? I /0 ATTORNEY Patented Dec. 15, 1931 UNITED STATES GROV'ER G. SPIGEIB, OF CLEVELAND, OHIO MACHINE FOR GRINDING AND SANDING RUBBER PRINTING ROLLERS Application flied January 7, 1930. Serial No. 419,035.

This invention relates to a machine for rough grinding, finish grinding and sanding any size rollers, especially rollers of yielding material such as the rubber rollers used in the printing industry, and will also grind to a grain finish, rubber rollers such as are used in lithograph work. One object is to grind to a dimension predetermined by the use of a sliding adjustment in conjunction with a fixed scale. Another object is to finish the roller to the necessary smoothness straight or crowned as desired by means of a four faced sanding attachment or turret head.

This machine is self contained, motor driven and fully enclosed, and is equipped with dust recovering devices;- when adjusted to the operation desired, it is automatic until that operation is completed.

Other objects may be readily noted from the following specifications and accompanying drawings, in which:

Fig. 1 is a front elevation of the grinding and finishing machine.

Fig. 2 is a top plan view of the machine with the top cut away.

Fig. 3 is a vertical section with the upper wall of the machine cut away, approximate ly on line 33 of Fig. 2, with the pulleys and gears shown diagrammatically where section is cut away.

Fig. 4 is a partial side elevation showing the grinding attachment in position.

Fig. 5 is a top view ofthe grinding at tachment with the grinding wheel in section.

Fig. 6 is aperspective view of the grinding wheel. 7

Fig 7 is a fragmentary section of the grinding wheel.

Fig. 8 is-a partial sectional view of the sanding attachment.

Fig. 9 is an enlarged portion of the above showing the clamping and tightening device in section.

Fig. 10 is a fragmentary section of the bed of the machine showing the guide rail portion on which the roller moves as being mounted on a lifting jack in its center portion.

Fig. 11 is an enlarged sectional view showing the guide rail in elevated position.

Fig. 12 is a fragment of the top plan view showing the elevation settings.

Fig. 13 is an enlarged section taken on line 1313 of Fig. 4.

Referring to the drawings the frame structure is shown at 1 having horizontal guide ways 2 and 2 which support and guide the carriage 3 which contains the usual propelling and reversing gears (not shown) driven by shaft 4 and reciprocating the carriage in a known manner.

- The carriage 3 has a vertical sliding head 5 moving in a dovetail slot 6 in the front of carriage 3 which head has an opening 7 in which either the grinding attachment 8 or the sanding attachment 9 may be inserted and locked in position by screw 10.

plunger 11 extends upwardly into sliding head 5 said plunger 11 having a keyway 12 on one side into which fits a dog point screw 13 which prevents the plunger 11 from turning but permits head 5 to slide up or down. Plunger 11 is engagedby a threaded rod 14, fitted into a threaded bore in the upper end of said plunger, which is threaded up to the shoulder 15 above which, it extends through the head 5 and through a threaded bushing 16 which screws into the rigid support 17 mounted on top of the carriage 3, the threaded rod 14 having on its upper end a hand feed wheel 18, which when turned to the right screws rod 14 down into plunger 11 thus lowering head 5. Around the said rod 14 is a tension spring 19 mounted between boss 20 on head 5 and shoulder 21 on threaded bushing 16 which has afeather key 22 fittted into the side; thus when threaded rod 14 is turned down in the plunger 11, the bushing 16 driven by feather key 22, follows, keeping an even tension on the spring 19 and so lowering head 5; until lifting roller 23 on the lower end of plunger 11 rests against guiderail 24, and the sanding attachment 9 is in correct working position.

Guide rail 24 is only used when the sanding attachment 9 is used and has various purposes. Its top face 25 runs parallel with the roller 26 and has two lifting wedges 27 and 27' which are adjustable and placed on.

r the guiderail 24 opposite each end of the along the ways 2 and 2' the lifting roller 26 but is approximately 3 A; inches out of line being narrower at the one end than the other; thus guide roller 31 attached to arm 117 of sanding attachment 9 by bolts 118 moving along this edge 30 causes the sanding attachment 9 to move at an angle across the roller 26.

A second set of ways 32 and 32, shown in Figs. 2, 3 and 4, are used to support two adjustable bearing sections 33 and33 with quick changing boxes which fit different size roller stocks.

The roller 26 is driven by a flexible coupling 34 which is driven by a driven pulley 35 which when grinding is driven by a pulley 36 giving a working speed of 12 R. P. M. to 18 R. P. M. by the use of a variable speed motor 37, but, when sanding, driven pulley 35 is driven by pulley 38 giving approximately 1000 R. P. M. Pulley 39 is driven by ulley 40 at approximatel 500 R. P. M. and pulley 41 is used to rive grinding wheel 55, idlers 42 and 43 being mounted on sliding head 5, and are a means for keeping an even tension on driving belt 44 which runs between the said idlers from the pulley 41 to the grinding wheel pulley 45 when the grinder is used.

When grinding, the reversing stops29 and 29 are moved back out of the way. The knob 105 is pushed in which changes gears to slow speed and the circuit breakers 46 and 46' are set forward on the upper way 2 to a point where the contact fingers 47 or 47 attached to the top of carriage 3 move over the said circuit breakers as the grinding wheel 8 reaches the end of the roller 26, thus stopping the motor 37, said contacts being in the motor circuit. Sliding head 5 is set by a scale 48 to the correct finished diameter and. is then looked in position by screw 49.

.The T shaft 50 of the grinding wheel attachment 8 is held in the opening 7 in the sliding head 5 by means of the locking screw 10 which fits in the opening 52 in the T shaft 50, the flange 53 of the said T shaft being pressed against the front of the sliding The driving shaft 54 is mounted on bearings 55 in the sleeve head 56 of the T shaft 50, the pulley 45 being suitably attached to one end of the driving shaft .54 to the other end of which is attached a grinding wheel 51 held between the narrow shoulder 56 on driving shaft 54 and the nut 113.

The grinding wheel 51 is hollow and epen at one side as shown in Figs. 5 and 6. The band of abrasive material 114 is drawn tightly around the outside of the wheel frame 57 and the ends are inserted in slot 58, in the frame 57 through the slotted bolt 59, the nut 60 is then turned down against lock washer 61 which tightens the sanded material 114 until it is held rigidly over the frame 57.

The sanding attachment 9 may replace the grinding attachment 8 and is mounted in the sliding head 5 in the same manner as the grinding attachment 8. The said sanding attachment consists of a shaft 62 which is hollowed at 63 into which tension spring 64 is inserted; and the open end 65 is threaded to receive plug 66 which is turned into the opening. The shaft 62 is slotted through at 67 to permit the pin 69 to move forward or back freely with the sleeve 68 through which the pin 69 is journaled holding the spring 64 in the hollowed portion 63 and also prevents sleeve 68 from turning; the sleeve 68 has a shoulder 70 at one end and is threaded at the opposite or front end on which a lock lever 71 is turned. The sanding frame 72 is mounted between the shoulder 70 and the lever 71 on sleeve 68 and has four flat surfaces each with a different grade of sanding and polishing material, which are held tightly in position at each end by means of the upper jaw portions 73 and 7 3 and the lower jaw portions 74 and 74 between which the material is drawn and locked in position by cap screws 75 on jaws 73 and 73' and tightened down by use of the bolts 7 5 which, when turned in the lower jaw portions 74 draw the flanges 76 along the dovetail grooves 77 in frame 72 until the lower jaw portions 74 are in the desired position.

When ,it is necessary to change the grade of sanding material, the lever 71 is pushed back allowing frame 72 to swing over until the ball 78 slides out of depression 79 in frame 72 and presses back against spring 80 which is held in position in receptacle 81 in shoulder of sleeve by the plug 82, when in the new position the ball 78 slides into depression 79' locking into position.

In the center of the back wall of the frame 1 is a powder container 83 which has an agitator 84 which is operated by gears 85 and 86 on shaft 87 which rotates the agitator 84 causing the powder to move around in the container. A ri id tube 88 is equipped with a nozzle 89 whic protrudes through the rear wall of the container 83 and projects forward into a funnel shaped tube 90 which is an integral part of the container 83 and fits through an opening in the frame 1, and to the tube 90 is attached a flexible hose 91 the other end of which is attached to a rigid tube 92 supported through a bracket 93 fastened byv suitable means to the carriage 3 and extending forward close to roller 26. A sliding valve 94 when opened permits the air from the blower 95 to move upward through the rigid tube 88 to the nozzle 89 which picks up the disturbed air and blows it through the funnel shaped tube 90 and the flexible hose 91, the rigid tube 92 having attached to its forward end a spray nozzle 96 which sprays the powder onto the roller 26 as the flexible hose 91 allows the sprayer to move with the carriage 3. This powder spraying attachment is used only in conjunction with the sanding attachment 9.

A roller crowning device 97 is attached at each end to the guide rail blocks 98 by means of the bolts 99 fastened through the slotted ends of the crowning device 97 which slots 100 permit the device 97 to slide forward as the lifting jack 101, attached to the center of the device 97 through the boss 102, and to the guide rail 24 through the boss 103, is turned up in the threaded boss 102 of the device 97 till the slot or groove 104 in the head of the lifting jack 101 is at the correct setting indicated on the surface of the crowning device 97.

The bed 106 of the frame 1 has twofunnel shaped depressions 107 and 108 which are connected to the blowers 95-and 109 and into which the refuse from the grinding and sanding is drawn to be blown through the connecting tubes or pipes 110 and 111 to the refuse box 112.

The grinding attachment is also equipped with guard 113 and cover 114 to which guard is attached a flexible hose 115' which enters the connection to blower 95 just below the funnel shaped depression 107 in bed 106 thus carrying-oil the refuse from the grinding operation; the grinding wheel is held within the guard 113 and cover 114 and as the wheel 55 revolves it throws the refuse into the mouth 116 of the guard 113, and so down through the blower 95 to the refuse box 112 as heretofore described.

It will be evident that changes may be made from time to time in the above construction that will not depart from the spirit or scope of the invention.

I claim:

1. A roller abrading machine comprising ways, a support for the roller,va carriage movable along the ways, a tool-holding head adjustably mounted on the carriage, a tool supa guide-rail having a surface along which the head travels, and an edge for guiding the tool, and an arm projecting from the sleeve and bearing against said edge to shift the sleeve and tool as the latter travels along the roller.

3. A roller grinding machine comprising in combination a frame having ways, and supports for the roller, a carriage movable along the ways, an abrading tool, a tool holding head adjustably mounted on the carriage, and means to adjustthe head including an adjustable plunger carried by the head, a guide rail along which the plunger travels, and a crowning rail adjustable on the guide rail and upon which the plunger bears as it travels.

1. In a roller abrading machine, the combination of a support for the roller, a traveling carriage, a tool mounted on the carriage to travel along the roller, a sand box, a nozzle carried by the carriage and flexibly connected to the box, means to force a blast of sand from the box and through the nozzle and against the roller, adjacent the tool, and a casing enclosing the roller, carriage and tool.

In testimony whereof, I do afiix my signature.

GROVER O. SPIGER.

porting arm projecting from the head, a tool shiftable axially on said arm, a guide rail having one surface along which the head travels, and means actuated by another surface of said guide rail to shift the tool at an angle to the axis of the roller as it travels along the roller.

2. A roller abrading machine comprising a traveling carriage, a head adjustable on the carriage, an arm prdjecting from the head, a spring-pressed sleeve slidable axially on said arm, a tool supported on said sleeve,

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