US2621865A - Web roll changer - Google Patents

Description

Dec. 16, 1952 w. c. WIEKING 2,621,855

WEBB ROLL CHANGER Filed April 8, 1947 2 SHEETSSHEET 1 Dec. 16, 1952 w. c. WIEKING 2,621,865

WEBB ROLL CHANGER Filed April 8, 1947 2 SHEETS-SHEET 2 INVENTOR WLkLIAM C. WIE KING Patented Dec. 16, 1952 WEB ROLL CHANGER William .C. Wieking, Woodhaven, N. Y., assignor to R. Hoe & Co., Inc., New York, N. Y., a corporation of New York Application April 8, 1947, Serial No. 740,155

2 Claims.

This invention relates to web roll changers and more particularly to means for stopping the rotation of a reel when a roll carried thereby is in proper position for splicing to a web and for properly timing a splicing operation with the angular or rotary position of the new roll.

The invention is applicable to roll changers of various types. For definiteness, however, it is disclosed as applied to a three-arm reel generally of known type. Such reels and splicing mechanism therefor are shown, for example, in Patents 2,063,098; 2,1 55A3O and 2,205,498. The invention is also shown as applied to a splicing operation in which the new web roll is brought into contact with the running web and may run in contact therewithfor a considerable time prior to the making of the splice, such method being fully disclosed in Wieking application Serial No. 691,422, filed August 19, 1946 for Method and Means for Replacing Web Rolls in a Printing Machine, now Patent No. 2,596,189.

It is an object of the invention to provide an improved means for stopping the reel rotation when a replacement roll carried thereby arrives at a predetermined position.

It is a further object of the invention to provide an improved means for timing the splicing operation according to the angular position of a new web roll.

It is .a further object of the invention to provide a single means capable both of controlling the stoppingof the reel and thesplicing operation.

With these and still other objects which will appear in the following fulldescription in mind, the invention consists in the combinations and arrangements of parts and details of construction which will now first be fully described in connection with the accompanying drawing, and will then be more particularly pointed out in the appended claims.

In the drawing:

Figure 1 is a schematic end elevation of a reel embodying the invention in a preferred form of embodiment;

Figure 2 is a schematic plan view showing the fresh roll of paper in the position where the reel rotation is stopped preliminary to splicing;

Figure 3 is a schematic view similar to Figure 1, but showing one end only of the roll and illustrating the operation of the device in timing the splicing operation.

Figure 4 is a detail view, on an enlarged scale,

1 showing the brush operating mechanism of Figure 1; and Figure 5 is a circuit diagram.

Referring now to Figures 1 and 2, there are indicatedvertical press frame elements I, which support press superstructure 2, and also, by means of brackets 3, support a shaft 4 which rotatably carries a three-arm reel. The reel comprises a pair of three-arm spiders 5 and 6 mounted on the reel shaft 3 and splined to the shaft for rotation therewith. Spindle chuck and brake assemblies 7, 8 and 9 are carried at the ends of the arms for rotatably supporting the paper rolls, and spindle brakin devices II} are associated therewith, such devices being operated by mechanism suspended from or carried by the spindle brake motor plate I I held from rotation by a bar linkage I2. In the figures, the web W is shown as :being ,fed from an expiring roll carried by spindles I and a fresh roll carried by its spindles 8 .isshown in position at the instant of splicing, such fresh roll having been brought up to speed by the driven belts I3 so that it is rotating at a peripheral speed slightly less than the speed of the running web. The splicing apparatus in the form of a swinging frame I4 is shown, as indicated, holding a brush I5 in splicing position and projecting a cutter I6 for severing th expiring web. The brush I5 may be operated in any convenient manner, as, for example, by applying tension to a cable I5, tending to move the brush toward the .new roll, and then at the proper instant energizing a, solenoid S to release the brush from acatch I5, as indicated in Figure l. The mechanism as thus far described is well known, the details thereof being shown in the patents above referred to and-such details accordingly are not repeated herein.

Alight source -.I I fastened to one of the frames or brackets, as shown, is provided and projects a beam parallel to the reel axis into a photocell I8. So long as photocell I8 is energized by the beam from light source I "I, the reel driving motor will continue to run. However, as soon as the periphery of the fresh roll interrupts this beam, the reel motor circuit will be interrupted, stopping the reel with the fresh roll in the position shown. It will be apparent that this means of stopping the reel does not depend upon the angular position of the reel itself, but automatically takes into account the diameter of the fresh roll, so as to stop the reel rotation when the periphery of this roll is in the proper position. The photocell I8 is carried by a bracket I 2 attached to the spindle brake motor plate I I and accordingly will occupy the same position relative to the end of a roll regardless of whether a full width or part Width roll is being used. The reel may be 3 driven in any convenient Way, as, for example, by a motor M driving the shaft 4 through a worm and worm wheel as indicated.

After the reel rotation has been stopped in the position of Figure l, the brush and knife frame I4 is brought down into the position shown. Splicing pressure, however, will not yet have been applied to the brush l5 and the knife I6 will be sheathed. The photocell I8 is pivotally mounted at 20, being normally held back against a stop 2| by spring 22. The photocell housing carries a projecting member 23 adapted for engagement by part of the splicing frame assembly l4, such as the aligning shaft 24. When the splicing frame is brought down to the position of Figure l, the photocell will be pivoted as indicated in Figures 1 and 3, so that the photocell will now be energized by the light from light source 26, also mounted on the bracket :9, this light being reflected to the photocell from the end of the roll. 30 long as the photocell is thus energized, the solenoids or other mechanism employed for applying the splicing pressure to the brush l5 and protracting the knife I6 for severing the web will not be energized. When, however, the reflected light from light source 26 is interrupted, photocell [8 will actuate the splicing mechanism for applying the brush pressure and thereafter severing the web. The web roll is prepared at the time when placed on the spindles in loading position (position of spindles 9, Figure 1) by applying to the end thereof a band or sector 21 of dark crayon or other material so that whenever the sector 21 passes the photocell assembly the refiected light will be interrupted or reduced to an intensity which will cause the photocell to opcrate.

The photocell It may be a conventional photocell comprisin a relay, and there may be associated, also, with the housing of photocell l8 a switch 28, such a, switch assuming either of two positions, depending on whether the photocell housing is in the position of Figure 2 or Figure 3. Such switch will enable the photocell to serve the double function of stopping the reel rotation and timing the splicing operation, by connecting the photocell relay to different elements in the well known web roll changer control circuits.

A suitable schematic circuit is indicated in Figure 5, the switch 28 being indicated in the position of Figure 2, in which position connection is established from power line L1 through the photocell switch I3 and contacts of the switch 28 through relay R1, which when energized opens the circuits applying current to the motor M, and,

hence, stops the motor. With switch 28 in its 4 other position (Figure 3), a circuit is established to line L2, through the photocell unit I8 through relay R2, which when energized operates the solenoid S to release the brush l5 for making the splice.

What is claimed is:

1. In a web roll changer having a rotatable reel for successively bringing web rolls into position for splicing to a rimming web and splicing mechanism moveable into and out of position for splicing running web to a replacement roll in position therefor; control mechanism comprising photocell means settable to respond to position of the periphery of a replacement roll, for stopping movement thereof toward a running web, and also settable to respond to angular position of a replacement roll about its axis for controlling a web splicing operation, and means associated with the roll changersplicing mechanism for setting said photocell means for such response to angular position of a replacement web roll upon movement of the splicing mechanism into position for splicing a running web to said replacement web roll.

2. In a web roll changer having a rotatable reel for successively bringing web rolls into position for splicing to a running web and splicing mechanism moveable into and out of position for splicing a running web to a replacement roll in position therefor; control mechanism comprising photocell means moveable into a first position to respond to position of the periphery of a replacement roll, for stoppin movement thereof toward a running web, and also moveable into a second position to respond to angular position of a replacement roll about its axis for controlling a web splicing operation, and means associated with the roll changer splicing mechanism for moving said photocell means into said second position upon movement of said splicing mechanism into p0sition for splicing a running web to said replacement web roll.

WILLIAM C. WIEKING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS

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