US1412994A - Safety device for winding and unwinding rollers - Google Patents

Description

w. E. BEADLE. SAFETY DEVICE FOR WlNDiNG AND UNWINDING ROLLERS.

APPLICATION FILED JUNE 8,192!- 1,412,994, Patented Apr. 18, 1922.

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Application filed June 8,

To all whom it may concern:

Be it known that I, \VARREN BEADLE, a citizen of the United States, residing at Grand Rapids, county of Wood, and State of Wisconsin, have invented new .and useful improvements in Safety Devices for Winding and Unwinding Rollers, of which the following is .a specification.

This invention relates to improvements in safety devices for Winding and unwinding rollers, and has particular reference to tie. vices for preventingaccidents in paper mills Where a plurality of rollers are interchangeably employed as receivingrOllers for .the paper strip delivered from the drying rolls.

In a paper mill. the newly formed paper winds upon a receiving roller, .and in order that the operation may be continuousit is customary to employ two receiving rollers, one above another, whereby when a roll of paper has been formed on one of the rollers.

to a desired diameter or radial thickness the strip of .papermay be .torn off and attached to the other roller upon which. it then winds. In: theineantime the paper :is withdrawn from the first mentioned roller and passes to .w-hat is known as a ,rewin'dingroller which .carriessuitable spools or cores, and with which esli'tters' areiassociated to subdivide. the strip longitu dinally. into strips. of

V the desired width for shipment andlcommercial use.

it is a frequent occurrence that the winding of the paper on one roller and the un winding it from the other roller do not take place simultaneously or with uniform speed, and therefore the peripheries .of the two rolls of paper may at times be in such close proximity as to constitute a source of danger to. workmen who might accidentally be drawn, between the rolls.

T he laws of various States have therefore required attachments for automatically preventinga continuation of a winding operation in any case where the peripheries of the two rolls are less than a specified distance apart, eight inches being usually specified as the minimum. distance permissible. But the attachments heretofore have been of a character to limit the possible diameter of a roll without regard to the diameter of the companion roll. This isa serious disadvantage for the reason that such limits must necessarily be predetermined and arbitrarily Specification of Letters Patent." Patented, Apr, 18, 1922,

1921. seri l n). 475,942. 7

fixed upona calculation based upon the assumption .that .the accompanying roll is of equal diameter,i. e. ,,at .themaximum diameter, whereas the companion roll is more commonly nearly unwound atthe time the wind ing roll reaches the maximum diameter permitted :by the gage.

It is the objectof this invention to provide a form of gage which maybe adjusted betweena Setofcornpanion winding rolls in a position for contact with the roll which is being augmented, the gage, however, being adapted .to yield progressively as the diameter of the roll increases until it is also brought contact with the companion roll or roller, nnder which conditions it operates to prevent further delivery ofpaper-to the roll-which isbeing wound.

'More particularly it islan object of this invention .to provide a yielding gage adapted for contact with a revolving roll of paper Without .any t endency [to tear the paper, and which is also adapted vto yield until it engages the companion roll, whereupon it be.- comes'effective to tear the paperstrip and present further deliveries ,tOuthB active re ceiving roller until the, condition which caused the. operation of the gage has been remedied. T 7

--By;] )roviding a contact with-lthej-paper on the receiving roller andcmaking such gage equal in diameter to the minimum distance permissible between the paper on the receivingroller and thatof the companion roller, 1 have found that it is possible to mount-the gage upon a yielding'support and allow it to be freely turned by frictional contact with the paper on the receiving roller until its .peripheryon the opposite side of the axis engages the paper on the companion roll, whereupon its ro tary motion .is arrested and itbecomes ef fective as a tearing agency, the surfaces of the two rolls, .(winding and unwinding) traveling in opposite directions on the side where such contact occurs.

An embodiment of my invention is illustrated in the accompanying drawings, in which f l Figure 1 is a front elevation of my invention as it appears in use, fragments of a set of companion winding rollers being illustrated with rolls .of paper thereon.

Figure 2 is a side view of the same.

ge adapted for rolling ber 10.

Like parts are identified by the same rei erence characters throughout both views.

'1 and 2 are companion rollers, such as are employed in paper mills, to receive the strip oi paper from the drying rolls. The drawing illustrates the roller 1 in operation as a receiving roller, the paper strip 3 being illustrated as being wound thereon to form the roll 4; The roller 2 is illustrated as it appears when unwinding, the paper strip 5 being drawni rom this roller. Therefore,

the roll of paper 6 on the roller 2 is dimin-v ishing in size, whereas the roll of paper 4 on the roller 1 is augmenting in size.

1 The gage roller 8 is mounted rotatably upon a shaft '9 carried by a supporting mem- A lever 11 pivotally connected with the supporting member 10 at 12 is fulcrumed at 13 upon a bracketllconnected with any suitable post or frame member 15 located at one side of the paper making machine adjacent to the receiving rollers l. and 2. A counter-weight 15 is adj'ustably mounted upon the lever 11 to balance the weight o'it' the-gageroller A linklZ connects the supporting member 10 with the bracket ld. This link is parallel with the lever 11, and the arrangement is such that the shaft-9 is supported in a horizontal positiom'or in -a position parallel with the rollers 1 and 2,

" and this parallelism will, of course, be maintained by the lever 11 and link 17 while the roller 8 is being moved vertically, inasmuch the roller] supporting arm of the lever 11 isof the same'lengthas the link 17.

f Thecounter-weight 15 is preferably adi i-usted to substantially balance the Weight of the roller 8 and associated parts so that the roller 8 will tend t-o remain in any position of ad ustment in which it may be placed, the roller, however, being free to yield under pressure without material resistance.

Therefore, if 1t be assumed that the lever 11 is adjusted in'a' horizontal position'as shown in Figure 1, the paper may be wound freely upon the rollerl until the roll 4 acquires a-diameter equal to that illustrated in Figure 1, at which time the roll 4: contacts with the roller 8 on the lower side. Thereupon, motion is transmitted to the roller 8 byreason of this frictional contact ofthe roll 4, and as the diameter of the pushed downi by a friction upon the roll 6, and as soon as this occurs the corresponding friction upon 7 the periphery of the roll at the pointof roller contact will cause the paper to tear. When torn ator near one margin the strip may immediately tear entirely across under the tension of the winding operation, thus rmeventing any further augmentation in the size of the roll 4. i 7

If the roll 6 should beunwinding atthe time the roller 8 is brought in contact with it the same result would be accomplished, for the paper unwinds from the underside of the roller 2, and therefore the roller 2 and roll 6 will revolve in the opposite direction fromthat in whichthe roller 1 and roll 4 revolve. t

1 claim:

l. A safety gage for, sets of winding and unwinding rollers comprising a yielding rotative device located between the rollers and adapted to be actuated by a roll wound upon either roller inthe contact with the other roller or with a roll thereon, said device be ing adapted to limit the distance between thecrolls by stopping the winding operation when in contact with both.

1 2. A safety gagefor sets of winding and unwinding'rollers comprising a gage roller and a support adapted to yieldingly hold the gage roller between the other rollers, said gage rollerbeing adapted tostop a winding operation upon one of the rollers when in contact therewith and in simultaneous con-- tact with the other roller or with a roll of material thereon i 3; The COIIlblDatlOilfWlth winding and un winding rollersjadapted to serve as receiving rollers for a: strip of paper in process of of rolls of Pap n em r pivotal upport for the gage roller, and a.

parallel link adapted tocooperate withthe pivotal supportin holding the gage roller with its axis parallel to the axes. of the other rollers. I

4. The combination with a set of receiving rollers for paper strips, of arrintermediate gage roller having a diameter substantially equal .tothe'permissible distance between rolls of paper on the receiving rollers a member upon which said gage roller is journaled, a relatively fixed support, parallel arms pivoted thereto and also pivoted to the roller carrying member and adapted to hold said member with the roller axis parallel to the receiving rollers, and means for counterbalancing the gage roller at associated parts'whereby the same will tend to remain in one position until actuated by contact with an augmentingv roll of paper on one of the receiving rollers.

The combination with a set of receiving rollers for paper strips, of an intermediate gage roller having a diameter substantially equal to the permissible distance between rolls of paper on the receiving rollers, a member upon which said gage roller is journaled, a relatively fixed support, parallel arms pivoted thereto and also pivoted to the roller carrying member and adapted to hold said member with the roller axis parallel to the receiving rollers, and means for counterbalancing the gage roller at associated parts whereby the same Will tend to remain in one position until actuated by contact With an augmenting roll of paper on one of the receiving rollers, said gage roller being positioned for contact with the augmenting roll of paper adjacent to one end thereof Whereby when the gage roller is brought in contact with the other roller or with a roll of paper thereon, the paper strip Winding upon the augmenting roll Will be torn away.

6. The combination with a receiving roller for winding into roll form a paper strip, a gage roller, parallel motion mechanism for supporting the gage roller between the first mentioned roller, and a relatively fixed member, said gage roller being adapted to rotate in contact with a roll of paper Winding upon the first mentioned roller and to yield progressively under such contact until it also engages the relatively fixed member to arrest its rotary motion and cause the paper strip to tear.

WARREN E. BEADLE

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