US2787954A

US2787954A - Paper roll marking apparatus

Info

Publication number: US2787954A
Application number: US363204A
Authority: US
Inventors: Gaudet Leo; William P Nesbitt; John C Steer
Original assignee: SMITH PAPER MILLS Ltd HOWARD
Current assignee: HOWARD SMITH PAPER MILLS Ltd; SMITH PAPER MILLS Ltd HOWARD
Priority date: 1953-06-22
Filing date: 1953-06-22
Publication date: 1957-04-09
Anticipated expiration: 1974-04-09

Description

April 9, 1957 GAUDET ET AL PAPER ROLL MARKING APPARATUS 5 Sheets-Sheet 1 Filed June 22', 1955 I JNVA'NTORJ [e o 6x701257- April 9, 1957 L. GAUDET ETAL PAPER ROLL MARKING APPARATUS 3 Shets-Sheet 2 Filed June 22, 1953 l'l'nl- I 25;- ib" 0 4; di 1 .Zk/ranroks V f w 7 E nflm, w a JMC am M ZWJX v 1 April 9, 9 L. GAUDET ETAL I PAPER ROLL MARKING APPARATUS 3 Sheets-Sheet 3 Filed June 22, 1953 United States Patent 6 PAPER ROLL'MARKING APPARATUS Leo Gaudet,"William P. Nesbitt,and John C. Steer, Cornwall, Ontario, Canada, assignors to Howard Smith Paper Mills Limited, Montreal, Quebec, Canada Application June 22, 1953,-SerialNo.-363,204

6 Claims. (Cl. 101-219) Thisinvention relates to improvements in paper mark- :ing :apparatus of the so-called ring marker-type in which the markers consist of rotatably mounted marking wheels :carryin'g =rubber marker rings which are pressed against aztravelling web of the paper while the'latter'is passing 'overa roll or-other supporting surface.

apressureiin such manner that the marking 'wheels maybe retracted either individually or simultaneously. Means are also provided whereby each marking wheel may 'be adjusted angularly about an axis perpendicular to its axis :ofrota'tion to thereby insure uniform full width contactwofthetmarker ring withthe paper during the marking ioperation. A further feature of the invention consists in mounting the marking wheels on a common rotary'supporting shaft so "that the marking wheels may be advanced from their fully retracted position to a position-close torbut out of contact with the paper by rotation ofzthe shaft about :its axisiand maythen' be moved relatively to said shaft and into marking contact with the .paper :by the controlled application of :air pressure.

Other characteristic features and advantages of the invention willbe more'readily understood from the following detaileddescription of the preferred embodiment shown :in :the .a'ccompa'nying drawings, in which:

Fig. .1 is a front elevational view showing our improved rring marking assemb'l-y arranged to mark the paper as it passes over the upper roll of a press-section. In this view the supporting frame of the assembly is :shown by tbrokenlines and certain elements, which appear inEig. 2,1are omittedfor the sake of clearness.

Fig. .2 is 'a view, similar to Fig. 1, but showing the rear-side of the assembly. '-In this view certain elements, which appear tinFig. 1, have been om'itted for the sake of clearness.

' Fig. 3 is va diagrammaticalview illustrating the air lines and valves through which the air is routed to and vfromccylinder .and pivotdevices controlling the operation of the marking assembly.

.Fig. -4fis a. fragmentary perspective view showing the marking wheels, the marking wheel supporting shaft, the marking wheel actuatingcylinders and certain other 'elements on. anenlarge'd scale,

- vEig. v5 :is an enlargedview, partly in section and partly in elevation showing the manner in which :one of the marking wheels, ismounted on the supporting shaft.

Figs. 6; and 7 are-detail views showing openingparts of an adjustable carrying arm by means of which each marking wheel'is'mounted on the supporting shaft; and

Fig. 8 'is a plan view of one of the brackets employed for pivotallysecuring the carrying arm of each marking wheel to the supporting shaft.

As shown in these drawings, our improved ring marking assembly includes a series of rotary marking wheels 5 a common rotary supporting shaft 6 on which said marking wheels are mounted for movement both with and relatively to said shaft.

Shaft 6 rotatably mounted in a supporting frame 7 (Figs. 1 and 2) by suitable bearings 6a and has one end connected by crank arm 8, rod 9, turn buckle 10 and rod -11 to a piston 12 operating in a cylinder 13 having its lower end pivoted at 14 to a suitable mounting plate 15. The upper end of cylinder 13 is connected by line 17 :(Fig. 3) and four-way valve 18 to an air supply line 19 which is preferably equipped with an air filter and oil injector 20. The lower end of cylinder '13 is also connected to air supply line 19 through line 21 and fourway valve 18. The air supply to

lines

17 and 21 by main supply 19 is preferably at mill pressure.

Each mar-king wheel 5 is equipped with a rubber marker ring '23 extending around the entire periphery of thewh'eel and carrying a series of marks 24 adapted to be impressed on the paper. Each marking wheel is also equipped with alaterally projecting stub shaft 25 rotatably journa'lled in a bearing 26 atthe upper end of a wheel carrying arm '27 having its lower end fixed to a pivot shaft 28 journalled in the arms 29 of a forked bracket 30 secured to the underside of shaft 6.

The upper portion of each wheel carrying arm 2'7 is pivotally secured by pivot 32,coupling 33 and piston rod '34 to a piston 35 "working in a cylinder 36 having one end pivoted at 37 to a bracket 38 rigidly secured to the upper portion of shaft 6.

Oneend of each cylinder 36 is connected by line 46 to a header41 which, in turn, is connected through line 42, regulating valve 43 and lines 44 and 45 to air pressuresupply line H. The other end of each cylinder 36 is also connected to the air supply line 19 through line 46, air pressure control and'regulating valve 47, line 4-8,

threeway valve 49 and lines 50 and 45.

In the present instance our improved ring marking apparatus is shown arranged to effect the marking of the paper afterthe latter is passed through the nip of a press section which is indicated at 51 in Figs. 1 and 2, and comprises upper and

lower press rolls

52 and 53 or" conventional design and arrangement. The paper passes through the nip of the press and then upwardly over a portion of-the top press roll 52 to and over the lead rolls 53' and 54. The marking wheels 5 are arranged to act against the paper while it is passing over and supported by the upper press roll 52.

When not in use the marking assembly including the marking wheels 5, shaft 6, wheel carrying arms 27 and wheel actuating cylinders 36 are swung in a clockwise direction (as viewed in Figs. 1 and 5) to a tuliy retracted position by operating the valve 1.8 to a position in which air is supplied to the lower end of cylinder 23 and is simultaneously exhausted from the upper end of the cylinder to atmosphere to thereby cause the piston 12 to move upwardly and to act through the rod 11, turn buckle 10, rod 9 and crank arm 8 to rotate the said marker assembly in a clockwise direction about the axis of shaft 6.

The marking assembly is put into operation by first operating valve 1 to a position in which air is supplied to the upper endof cylinder 13 and the air previously supplied to the lower end of the cylinder is simultaneously exhausted to atmosphere. The piston 12 is thus caused to move downwardly in cylinder 13 and to swing the marker assembly in an anti-clockwise direction about the axis of the shaft 6 until the marking wheels come to rest a relatively short distance, approximately /2", from the face of the upper press roll 52. This stoppage of the marking wheels 5 at the required distance from the face of the upper press roll 52 is predetermined by prior adjustment of the turn buckle to regulate the magnitude of movement imparted to the crank arm 8.

The

valves

47 and 49 serving each marking Wheel actuating cylinder 36 are then positioned to permit the flow by way of lines 45 and Stl, valve 49, line 48, valve 47 and line 46 to thereby cause the pistons 35 to advance the marking wheelinto pressure contact with the paper as the latter passes over the upper press roll 52. This wheel-advancing movement of piston 35 is effected against the back pressure of air supplied to the other end of the said cylinder 36 by way of lines 45 and 44, valve 43, line 42, header 41, and line 40. The back pressure air thus supplied to cylinder 36 is controlled by means of the regulating valve 43 and is preferably delivered to header 41 at a pressure of approximately 12 lbs. p. s. i.

The application of pressure fluid to both sides of each piston 35 gives a double cushioning or stabilizing effect which prevents fluctuating or bouncing movement of the marking wheels during the marking operation and ensures an even impression of the marks on the paper. In other words, the back and front pressure loading of the pistons 35 gives a stabilizing dash-pot or shock-absorbing effect.

The effective pressure with which each of the marking wheels is pressed against the paper may be regulated by prior adjustment of the pressure control and regulating valve 47 serving said marking wheel. Any one or any number of the marking wheels 5 can be individually retracted from contact with the paper by operating the valve 47 of the selected wheel or wheels to a position connecting the air line 46 to atmosphere, thus allowing the back pressure air supplied to cylinder 36 through line 40 to move the pistons 35 to a retracted position. All of the marking wheels 5 may be withdrawn simultaneously and retracted from contact with the paper by exhausting the air lines 48 to atmosphere through the exhaust valve 49 through which all of the said lines 48 are connected to line 50.

It is desirable that each marking wheel 5 be adjustable about an axis perpendicular to its axis of rotation to insure uniform full width contact of the marker ring 23 with the paper during the marking operation. To this end the carrying arm 27 of each marking wheel is composed of two sections (Figs. 5 to 7 inclusive) including an upper wheel-carrying section 52 and a lower socket section 53, the latter carrying the pivot shaft 28 which, as previously described, is journalled in the arms 29 of the forked bracket 30. The socket section 53 is provided with a cylindrical socket 54 rotatably receiving therein a cylindrical lower portion 55 of the Wheel carrying section 52. The two

sections

52 and 53 are rotatably secured together by means of a retaining pin 56 passing through the socket section 53 with its intermediate portion engaging in a circular groove 57 provided in the lower cylindrical portion 55 of section 52. The wheel 5 and the section 52 of each wheel carrying arm 27 are thus mounted for turning movement about an axis 58 perpendicular to the axis of rotation of said wheel. The wheel carrying section 52 is turned about the axis 58 and/or secured in adjusted position by means of two set screws 60 which are threaded through a widened portion 61 of socket section 53 to bear against the ends of an opposing widened portion 62 of the wheel carrying section 52.

The air supply lines 46 serving the marking wheel actuating cylinders 35 are preferably passed to said cylinders through the hollow interior 6b and fittings 6c of shaft 6. Header 41 is mounted on shaft 6 by means of suitable supporting brackets indicated at 64 in Fig. 4.

Having thus described the nature of our invention and a preferred embodiment thereof it will be understood that various modifications may be resorted to within the scope and spirit of the invention as defined by the appended claims.

We claim:

1. Paper marking apparatus of the character described comprising a paper supporting surface over which the paper to be marked is passed, a rotary marking wheel supporting shaft, a plurality of wheel-carrying arms having their lower ends pivotally secured to said shaft, a marking wheel rotatably carried by the upper end of each of said arms, means for rotating said shaft about its axis and bringing said marking wheels into a position close to the paper to be marked, a cylinder and piston device connection between said shaft and each of said arms and valve controlled conduits through which air under pressure is routed to and from opposite ends of the cylinder of each of said cylinder and piston devices to effect movement of said marking wheels into marking contact with the paper to be marked.

2. Paper marking apparatus as set forth in claim 1 in which the means for rotating said shaft comprises a crank arm having one end connected to said shaft and a cylinder and piston device connected to the other end of said crank arm.

3. Paper marking apparatus of the character described comprising a shaft mounted to rotate about its central axis, means for rotating said shaft, a plurality of wheelcarrying arms each having its lower end pivotally secured to said shaft, a marking wheel rotatably carried by the upper end of each of said arms and a cylinder and piston device connected between each of said arms and said shaft, each of said arms comprising a lower section pivotally connected to said shaft and an upper wheel carrying section rotatably adjustable with reference to the lower section to thereby effect angular adjustment of the marking wheel carried by said upper section about an axis perpendicular to the axis of rotation of said wheel.

4. Paper marking apparatus of the character described comprising a supporting shaft mounted to rotate about its central axis, means for rotating said shaft, a plurality of wheel-carrying arms each including a lower socket section pivotally secured to said shaft and an upper wheelcarrying section having its lower end rotatably fitted in the socket of said socket section to provide for rotary adjustment of said wheel-carrying section relative to said socket section, a marking wheel rotatably carried by the upper wheel-carrying section of each of said arms, and a plurality of cylinder and piston devices each connected between said shaft and the upper wheel-carrying section of one of said arms, the upper wheel-carrying sections of said arms being rotatably adjustable with reference to the lower socket sections to thereby effect angular adjustment of the marking wheel about axes perpendicular to the axes of rotation of said wheels.

5. Paper marking apparatus of the character described comprising a paper supporting surface over which the paper to be marked is passed, a shaft mounted to rotate about its axis, a plurality of wheel-carrying arms having their lower ends pivotally secured to said shaft, a marking wheel rotatably carried by the upper end of each of said arms, means for rotating said shaft about its axis and bringing said marking wheels into position close to the paper to be marked, a plurality of separate cylinder and piston devices each connected between said shaft and one of said arms, a header, air conduits individually connecting corresponding ends of the cylinders of said cylinder and piston devices to said header, an air pressure supply line, means for connecting said header to said air pressure supply line or to atmosphere so as to operate the pistons therein to a marking position and to maintain pressure on both sides of said piston during the marking operation to prevent bouncing of the marking wheel and valve-controlled conduits through which the remaining endsof said cylinders are connectable to said air supply line or to atmosphere.

6. Paper marking apparatus of the character described comprising a plurality of rotatable marking wheels, wheel mounting means mounting each of said wheels for movement to and from a marking position and for angular adjustment about an axis perpendicular to the axis of rotation of said wheel and pressure fluid actuated means for shifting said wheels to and from said marking position, said means comprising a plurality of cylinders, pistons mounted in said cylinders, means connecting each of said pistons to a different one of said marking wheels and means for supplying pressure fluid to opposite ends of each cylinder so as to operate the pistons therein to a marking position and to maintain pressure on both sides of said pistons during the marking operation to prevent bouncing of the marking wheel.

References Cited in the file of this patent UNITED STATES PATENTS Hale Feb. 19, Klund et a1. Mar. 24, Dietrich Nov. 29, Goebel et a1. June 25, Stevens July 23, Barber Aug. 27, Tyler Dec. 23, Sahlin June 1, Richardson et a1. June 17,

FOREIGN PATENTS Switzerland Feb. 16,