US2095307A - Web roll controlling mechanism for printing machines - Google Patents

Description

Oct. 12, 1937. H. v. BALL ET AL WEB ROLL CONTROLLING MECHANISM FOR PRINTING MACHINES Filed Ma 5, 1934 s Sheets-Sheet 1 o T m T A0 2: R v Yn r: mm N NW ww I AB m a i I z: .w \Y iz/bf/ m RV m 1 4 1| Q E R L 1 g 3 vv vV vVVV vvvv v \3 Wm \QM: WU nliogm 7 m.\\ m mm ww mJ mH Oct. 12, 1937. H. v. BALL El AL 2,095,307 WEB ROLL CONTROLLING MECHANISM FOR PRINTING MACHINES Filed May 5, 1934 .s Sheets-Sheet 2 9 INVENTORS. HARRYV. BALL,

ALBERTJ.HORTON.

Oct. 12, 1937. H, v BALL .5 A 2,095,307

WEB ROLL CONTROLLING MECHANISM FOR PR INTING MACHINES Filed May 5, 1934 3 Sheets-Sheet 3 INVENTORS.

' HARRY V. BALL- ALBERT-J. HORTON.

Patented Oct. 12, 1937' WEB ROLL CONTROLLING MECHANISM FOR PRINTING MACHINES ,Harry V. Ball, Concord, Mass., and Albert J. Horton, White Plains, N. Y., assignors, by mesne assignments, to R. Hoe & 00., Inc., New York, N. Y., a corporation of New York Application May 5, 1934, Serial No. 724,062'

4 Claims.

This invention relates to an improved mounting forweb rolls used in conjunction with newspaper printing machinery and more particularly to a friction brake device which is adapted to I continuously applya braking pressure upon the chuck spindle which supports the roll while the web is drawn fro-m the web roll, and is further adapted to automatically vary said braking pressure as the roll diameter changes during the i unwinding thereof.

Web rolls areusually mounted upon two chuck spindles one at each end thereof, which spindles are slidable endwise in suitable supporting brackets or standards. Braking means have also pre- 15 viously been provided but are only adapted to apply a fixed braking pressure to the spindle It is one object of the present invention to provide an arrangement which is adapted to rotate with the chuck spindle andwhich will cause yield- 20 able brake members to frictionally engage a fixed sleeve and apply a braking pressure thereto, which will thus prevent the web roll from racing or feeding the web faster than required.

Another object is to provide means whereby the 'brakingpressure is adapted to be gradually relieved as the diameter of the roll decreases and the speed increases, which result is brought about through the action of centrifugal force applied to the brake members. Y

Anotherobject is to provide means whereby the fixed sleeve is adapted to be released so that the chuck spindles will rotate freely when anew roll is being mounted thereon and the web is thread- 35 ed through the guide rolls of the machine.

chuck members are adapted to be moved into or out of engagement with the web roll while in a driving relation with the brake supporting member.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of? parts, and in the details of construction hereinafter described.

The preferred embodiment of the invention is illustrated in the accompanying drawings wherein: V

Figure 1 is an end elevational view of a web roll 0 support with parts broken away and showing generally the'chuck spindle and brake mounting;

Figure 2 is a. vertical section taken. on the'line 2 of Figure 1, showing the mounting for the brake mechanism on thechuck spindle; 55 I Figure 3 is a vertical cross section taken along Another object is to provide means whereby the theline 3 of the Figure 2 showing the brake mounting;

Figure 4 is a vertical cross section taken along the line 4 of Figure 2 showing a hand actuated brake band engaging a. floating sleeve and which 5 is adapted to hold the sleeve in a stationary position;

Figure 5 is a side elevational view of one roll support end, showing the chuck reciprocating member; and

Figure 6 is a fragmentary vertical section taken on the line 6 of Figure 5, with parts in elevation, showing the chuck actuating member in operating engagement with the chuck supporting member.

Referring to Figure 5, one end of a web roll indicated as I I, is mounted in a running position on a chuck l2. A spindle l4, projecting inward from the head of said chuck, is rotatably mounted within suitable bearings such as ball bearings I5, which bearings are secured within a ring housing I6 and the latter is slidably mounted within a bore I! in the head of the support I 3.

Means is provided for moving said ring housing It laterally within the support head to thereby move the chuck l2 into or out of engagement with the web roll. Said means comprises a handle l8, having a head portion fixed to the outer reduced end of a stub shaft l9, which shaft is rotatably mounted within a bore 2|, provided in the side of the support head as shown in Figure 6, and has an eccentrically positioned projection 22, which engages an elongated vertical slot 20 within the side of the ring housing It. A plate 23, having diametrically opposed slots 24 in the end thereof, is secured to the support head and has an opening 25 therein, Whichis adapted to freely fit over a shoulder 26 on said stub shaft IS. A collar 2'! secured to the outer end of the 40 stub shaft l9, locks the head of the handle 18 against the plate 23, and said plate positions the shaft within the bore 2 l.

In the position shown in the drawings the eccentric projection .22, on the stub shaft I9, is shown as having moved the chuck outward into a web roll engaging position. To move said chuck out of engagement with the rollthe handle will be swung through an arc of 180 which will cause the eccentric projections to move within the elongated slot 20 and by its engagement with one wall thereof will movethe ring housing: l6 and chuck therein away from the web roll. A similar movement of the handle: through 180 will again return the chuck to its extended position. By means of a spring retracted handle lever 23, pivotally mounted on the handle it. and a plunger 23 connected therewith and engaging one of the slots 24 in the plate 23, the stub shaft is is locked in, either a chuck engaged or disengaged position. Guides 3| are provided on the handle to support and guide the plunger 23.

Referring now to Figure 2, a portion of the chuck spindle I4 is shown extending beyond the ring housing I 3. A splined sleeve 32 is keyed to the extended end of't'he chuck spindle and is flxed between the inner ring of one of the spindle bearings and a collar 33 secured to the end of the splined shaft. A key 34 is also fixed within the outer periphery of the splined sleeve.

A brake shoe supporting structure and parts cooperating therewith are mounted over the splined sleeve and are supported by the head of the standard I3. Said structure comprises a support sleeve 35 which has a flange 33 at one end thereof, and a ring 31 which is bolted to the head of the standard I 3 and is adapted to retain the flange 36 of the sleeve 33, in a running relation within an undercut portion 33 thereof, and also includes a floating sleeve 33 mounted over said support sleeve 35 and a brake shoe supporting sleeve 4|, mounted over and keyed to the spline sleeve 32. A flange 42 projects upward from the outer end of the sleeve 4 I. Set screws 43-43 are secured within the sleeve portions of the support sleeve 35 and the brake shoe support sleeve 4|, as shown in Figure 1, so that both of said sleeves will rotate together. The entire brake shoe supporting structure in fact, as thus far described, is rotatable with the chuck spindle, and the chuck spindle with the splined sleeve 32 secured thereto, is slidable endwlse within the brake shoe supporting sleeve 4|.

Two diametrically opposed brake shoes are positioned over the periphery of the floating sleeve 33 and are carried by the flange 42 of the brake shoe supporting sleeve 4|. Each brake shoe comprises a bracket 44, having a concave lower portion with brake lining 43 thereon and upwardly 43 disposed ears 43, which ears are pivotally mounted upon a rocker beam 41. Said rocker beam is pivotally mounted at the end of a stud 43 pro- Jecting from the inner face of the flange 42. Spring tension means is provided to maintain a so predetermined pressure of the brake shoes upon the periphery of the floating sleeve and comprises an expansion spring 43, and a coupling member 3| joined thereto, which have their free ends secured between two ends of the rocker 63 beams 41-41 as shown in Figure 3. Said coupling is preferably of the turnbuckle type, which is adapted to be adjusted to vary the tension of the spring 49. Counterweights 32 are provided for the opposite ends of the rocker beams 41 and are also adapted to be adjusted within openings 33, to provide a desired compensation or counterbalance against tensionof the spring 43.

A manually actuated friction brake member is provided to engage the floating sleeve 33, as

post 51, projecting from the fixed ring 31. The opposite end of said brake band 54 is secured to a stud 53, which stud is secured within a hand lever 53, pivotally mounted on a pivot stud 3|, in the head of the standard l3. The pivotal portion of the hand lever is positioned within a cavity 32, in the lower end of the ring 31, the walls of which cavity provide stops for the lever 53 when the same is moved to a brake band clamping or unclamping position. It will be observed that by the arrangement of the brake band anchoring stud 53, on the hand lever 59, the said stud 53 will be thrown to an oil center position in relation to the hand lever pivot stud SI and said hand lever will be locked thereby.

In regard to the operation of the brake shoe mechanism, it will be observed that the brake shoe sleeve 4| will rotate with the chuck spindle l4, through its keyed connection with the splined sleeve 32, and that the support sleeve 35 will also rotate therewith by reason of the set screw connection between the brake shoe sleeve and the support sleeve. When the brake band actuating hand lever 53 is thrown to the position shown in Figure 4, the floating sleeve 33 becomes fixed in a stationary position, due to the brake band being mounted on the stationary supporting structure, and said sleeve then becomes a bearing within which the supporting sleeve 33 rotates. A thrust washer 33 is placed between the end of the floating sleeve 33 and the flange 42 of the brake shoe sleeve, to take the end thrust of the floating sleeve when the brake shoe supporting structure is rotating. The brake shoes will exert a certain predetermined pressure or tension upon the periphery of the clamped floating sleeve as they are rotated therearound. Since the original pressure is regulated to satisfy the conditions required for a full sized roll of large diameter, a certain varying reduction of said pressure would be required as the diameter of the roll is reduced while the web is fed to the printing machine, which would cause the roll to accelerate in proportion to its reduction in size. This latter condition is provided for through the mounting of the brake shoes on their rocker beams 4|4|, which beams have a tendency to be moved slightly around their pivot studs 43-43 by centrifugal force, which increases as the speed of rotation of the web roll increases. The centrifugal action will thus act against the tension of the spring 43 to release the tension of the brake shoes upon the sleeve 33, and maintain substantially constant tension on the web running from the roll.

when setting up a web roll, the chuck I3 is moved from a retracted position into engagement with the web roll by the movement of the hand lever 23, the arrangement being such as to permit the chuck spindle to move endwise within the brake shoe supporting structure without interiering with same. The hand actuated brake band lever 33 provides a convenient means for freeing the spindle from the brake, when preparing the web rolls for use.

It will be seen that a web roll control mechanism is provided having a brake device which acts automatically to reduce brake pressure as the speed of the roll increases due to its decrease diameter.

It will be understood that the invention may be embodied in other speciflc forms without departing from the spirit or essential attributes thereof, and it is therefore desired that the present embodim'ent be considered in all respects as illustrative and not restrictive, reference being had to the appended claims rather than to the foregoing description to indicate the scope of the invention.

What we claim is:

1. A web tension control mechanism operable upon a web roll supporting spindle, a brake supporting structure positioned over said spindle and in driving relation therewith, including a stationary member, brake shoes mounted on said supporting structure for movement therewith and being in engagement with said stationary member, said brake shoes being movable from engagement with said stationary member by centrifugal force due to their movement with said supporting structure, and means to maintain said brake shoes in constant yieldable engagement with the periphery of said stationary member to exert a braking pressure thereagainst.

2. A web tension control mechanism operable upon a web roll supporting spindle, a brake supporting structure positioned over said spindle and in a driving relation therewith, including a floating sleeve, means to clamp said sleeve in a stationary position, brake shoes mounted on said' supporting structure and engageable with said sleeve, and means to move said brake shoes out of engagement with said sleeve by centrifugal force due to their movement. with said supporting member including a rocker beam for each brake shoe pivotally mounted on said supporting structure and connected with its brake shoes, and means to maintain said brake shoes in yieldable engagement with the sleeve.

3. A web tension control mechanism operable upon a web roll supporting spindle, a standard to support said spindle, a brake supporting structure positioned over said spindle and rotatably mounted on said standard in driving engagement with said spindle, a splined sleeve keyed to said spindle and to said brake supporting structure, a floating sleeve supported on and positioned in a concentric relation to said brake supporting structure and spindle, manually operable means to clamp said floating sleeve in a stationary position, brake members pivoted on said brake supporting structure for movement therewith and being movable aboui the pivots thereof relatively to said structure by centrifugal force, and means tending to maintain saidbrake mem-bers in a frictional engagement with the periphery of said clamped sleeve.

4. A braking mechanism operable upon a web roll supporting spindle, a brake supporting structure positioned over said spindle and adapted to be driven thereby, a floating sleeve positioned in a concentric relation to the brake supporting structure and spindle, a brake band engaging said sleeve and a manually operated clamping handle connected therewith to clamp said sleeve in a stationary position, rocker beams pivotally mounted on said brake supporting structure at opposite sides of the periphery of said sleeve, brake shoes loosely mounted on said rocker beams and engaging opposite peripheral surfaces of said sleeve, adjustable spring means expanded between two adjacent ends of said rocker beams and compensating counterweights mounted on the opposite ends 01' said rocker beams.

HARRY V. BALL. ALBERT J. HORTON.

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