US1093913A - Paper-roll-driving mechanism. - Google Patents

Description

G. W; CHURCH,- PAPER ROLL DRIVING MECHANISM. APPLICATION FILED JULY 23, 1910.

1,093,91 3. Patented A r.- '21, 19m

G. W. CHURCH PAPER ROLL DRIVING-MECHANISM.

APPLICATION FILED JULY 23, 1910.-

\1,093,913. Patented Apr.21,- 19 1'4.

2 snnms sn'nnw 2. v

INVENTOR ing and similar machines.

UNITED sTArEs PATENT oF-ruon.

GEORGE w. cnnncir, or'srnitrnonnfoonnnorrcur. nssrenon To 3. non AND 00., or new YORK, N. Y., n-oorerormrron or NEW YORK.

PAPER-ROLL-DRIVING MECHANISM.,

Specification of Letters; Patent. Patented Apr. 21, 1914.

Application filed m 23, min. serial No. 573,540.

To all whom it. mag concern; T

Be it known that I, Gn'oRenW. Qnuncrr, a citizen of the United States, residing at Sta1nford, 'county;-of .Fairfield, and Stateof.

Connecticut, have'invented certain new and useful Improvements in Paper Roll-Driv' ing Mechanism, fully described and repre.- 'sented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to improvements in paper roll: driving mechanisms for print-' In an applicationfiled R .)bert Hoe, May 11, 19 10, Ser.No. 560,567, there is dis:

closed a driving mechanism for paper rolls of printing and similar machines which in.- cludes a .conti-nuously'running driver roll, the drivin engagement between the driver roll and t e paper, roll being maint ined as the paper'roil ,decreases in size?" hile the mechanism. disclosed insaid application is efiicient under certain conditions, it

sometimes happens that the tension on the web which is bei pulled'ofi' the web roll varies due to, slig tvariations in the demands made (in the roll by the mechanisin of the printing machine. In some cases, the

stretch of the web will take care of the variations referred to, but, in .other cases,

particularly: where the web is composcd'of comparatively stilt a'nd'hard stock, the web has a tendency to break.

The present invention has for its object to produce an improved w eb feedin mechanism for printing'and similar mac ines in which there is employed a continuously running driver with .which the web is maintained inconstant engagement, the construction including'mechanism by which cally varied.

A further object ofthe invention is to produce an im rove'dwebfro'll driving mechanism for WlllCll there is employed a continuously running driver with which the web roll, is maintained in constant engage ment, the construction including mechanism by which the surface speed of thev sists in certain constructions and in certain section, of a roll drivin body ng the ]l'l\"I1iI-l0l1.

he surface speed of the driver is automatiparts, improvements and combinations as will be hercinaftertully described and then I specifically pointed out.

Referring to the accompanying drawings: Figure 1 .is a plan view, partly in mechanism emvation of part of the construction illustrated ig. 21s a side elein Fig. 1, showing more particularly the 1 connections between the tension and the driver. Fig. 3 a detail front view, partly in section, or a part of the construction illustrated in Fig. 2.

' Referring to the drawings which illustrate one embodiment. of the invention, 1

indicates the side frames of the machine.

achines embodying the invention will 'include a continuously running driver so constructed that/its surface speed may be varied. In the best constructions embodying the invention, the driver will consist of a sectional roll constructed so that it may contract or expand as required to vary its surface speed. In the particular construction'illustrated, the driver roll 2 is mounted on a shaft 3 provided with a driving gear L which may be suitably geared with anv -moving part of the machine, so that the In the particular construction illustrated,

provision ismade for driving a pluralit ofrolls from one driveigtwo rolls being shown, the shafts of these rolls being marked The driver is so located as to engage the exteriorsurface of the paper roll or rolls, and provision is made for maintaining engagement between the drivcrjand this purpose.

When fluid under pressure isemployed t maintain the driving relation between the driver'and the paper roll the character of the source from which the fluid is obtained under pressure is maintained, the fluid entering the reServoinby means of a pipe 7.,

a suitable regulating valve, ind cated at 8,-: being provided, 1f desired, to control" the inflow of the valve.- As shown, this reservoir is provided with an outlet pipe 9 which, by means of two branches 10, conveys'the fluid under pre'ssureto piston chambers 11 mounted on the frame of the machine. In the particular construct-ion shown, inasmuch as two rolls are illustrated, two pairs of' these piston chambers are employed, but as. the construction of these chambers and their connections are identical, only one pair will be described. L'ocated in these piston chambers are pistons (not shown.) which are connected by rods 13 with the bearings 14 in which the paper roll shaft 5 is mounted.

These bearings are shown as movable on ways 15 formed on the machine frame, the hearings and ways forming a support for the roll. \Vhile the mechanism described forms a simple and efiicie-nt means for supporting the roll, the construction may be varied in this respect, if desired. The pipes 10 are provided with branches 16, 17, so that the fluid may be admitted to either side "of the pistons, the flow being controlled by suitable cocks 18. When, as in' the construction shown,-two pairs of piston chamthe however, will usually include a suitable conbers are employed, what may be termed the second pair of pistons may be supplied with fluid pressure by branch pipes 19. 'By the constructiondescribed, the paper rolls, or either of them, may be brought into driving relation and maintained in such relation by the driver.

- Constructions embodying the invention will, as has been pointed out, include means for varying the surface speed of the driver and as has been stated, in the best constructions embodying the invention, the driver roll will be made upj of sections to enable this to be readilyfettected. In the particutroller which may, as in the particular construction illustrated, consist of 'a cone 31 mounted to slide on the shaft 3, the cone being provided with a collar 32 engaged by an operating yoke 33. I11 order to insure the positive operation of the sections 30 by the controller, the cone 31, when a cone is employed, may be provided with dove-tailed ribs 34 engaging corresponding dove-tailed recesses on the interior of the segmental sections 30. .It will be understood that, in

the best constructions embodying the invention, when the driver comprises a roll made up ofsegmental sections, the controller will comprise. a cone and suitable operating dewices therefor at each end of the driver.

Inasmuch, however, as the construction may fbe identical, only one cone and one set of driving connections are shown. 3 The operating .devices for the driver, whatever may be-its construction, Wlll be of such acharacter as to vary the surface speed of the driver as the tension on the web var1es. \Vlnle the means by which this result is accomplished may be varied, m the provided a tension roll 35 over which the web is led from the web roll, this tension roll, in the particular construction illustrated, being supported. in sliding boxes 3(3- movmg on guides 37 in recesses in the frame, the boxes resting on springs 38. A guide roll, as 39,. is provided over which the web also runs, this roll being located in such relation to the roll 35 that any increase or decrease in the tension of the web will operate to vary the position of the roll 35,

the springs 38 permitting this variation.

The tension of these springs may be controlled by screws 39, 40 and lock nuts 41.

In the particular construct-ion illustrated, the movements of the roll 35 caused by the variations in tension of the web, are utilized to vary the surface speed of the driver. While the connections by which this is ac 'complished may be varied, in the particular construction illustrated, there are provided connecting rods 42 secured at 43 to the boxes of the tension roll 35, and at 4-4 to levers 45 which control the cooks in branch pipes 46 connecting with the branches 19 which are in open communication with the accumulator 6. The pipes 46 are provided with branches 47, 48 which lead to opposite ends of a piston chamber l9, this chamber bein provided with a piston, the piston rod of w iich is connected with or is formed in one piece with the. yoke 33 before referred to.

lVith the construction as described, it will be understood that as the tension on the web increases the roll 35 will be forced down, thus operating the cock controlling levers 44. The levers will, therefore, be moved in such a way as to admit the fluid under pressure through the branch 48 to the piston chamber 49, so that the piston is driven-forward, this driving the controlling cone 31 into the roll 2. As the cone is driven into the roll 2, the sections 30 are forced away from the center of the roll, thus increasing the size of the roll and, as the roll is continuously i driven, increasing its surface speed. hen, however, the tension on the web decreases, the roll 35 will rise and through the connections described, withdraw .the cone from the roll 2, thus decreasing its size and its surface speed. the roll particular construction illustrated, there is i varies in size, therefore,-its surface speed will vary, and its driving effect will vary,

so that the web will be properly pulled off the roll under varying tension conditions.

Changes and variations may be ma de 1n the construction by Which'the invefitlon claimed is carried into efiect. The'invention" claimed, therefore, is not to be limited to the particular construction hereinbeforedescribed, and illustrated in the accompanying drawings.

What is claimed is 1. A driving mechanism for paper rolls of printing machines including in combination a roll support, a continuously running driver roll,means including a source of fluid pressure for maintaining the driving engagement between the driver roll and thepaper roll as the paper rOll decreases in size,

and fluid pressure operated means controlled by the web tension ,for varying the surface speed of the driver roll.-

2 A driving mechanism for paper rolls whereby the driving engagement is maintained between the driver roll and the paper roll as the paper roll decreases in size, a web tension, and connections between the source of fluid pressure and the driver roll controlled by the tension for varying the surface speed of said roll. 4. A driving mechanism for paper rolls" of printing machines including in combination a roll support, an expan'sible driver roll, a source of fluid pressure, connections from the source of fluid pressure whereby vthe driving engagement between the driver roll the paper roll-is maintained as the roll decreases in size, and connections from the source of fluid pressure controlled by the web tension forvarying the size of the Y driver roll.

. A driving mechanism for paper rolls of printing machines including in combination a roll support, a continuously running expans ble sectional driver roll, a source of fluid pressure, connections from said source of fluid pressure'for maintaining the driving engagement between thepaper roll and the driver roll the paper roll decreases in size, a controller for varying the position of the sections on the driver roll, a web ten: sion, and connections from the source of fluid pressure controlled by the tension for operating the controller.

In testimony whereof, I have hereunto set hand, in the presence of two subscribmg witnesses. I

GEORGE w. CHURCH. Witnesses: i I

RICHARD KELLY, WILLARD E. MASON.

Images