US2017343A

US2017343A - Web renewing mechanism

Info

Publication number: US2017343A
Application number: US586555A
Authority: US
Inventors: Hobart N Durham
Original assignee: GOSS PRINTING PRESS CO Ltd
Current assignee: GOSS PRINTING PRESS Co; GOSS PRINTING PRESS CO Ltd
Priority date: 1932-01-14
Filing date: 1932-01-14
Publication date: 1935-10-15
Anticipated expiration: 1952-10-15

Description

Oct. 15, 1935'. H. N. DURHAM A2,017,343

WEB RENEWING MEGHANISM A I I Filed Jan. 14, 1932 4 Sheets-Sheet .1

INV ENTOR TIF- 1 HOBART N. DURHAM v ct. i5, 1935o H. N. DURHAM WEB RENEWING MECHANISM Filed Jah. 14, 1932 4 sheets-sheet 2 INVENTOR HAR DURHAM Ott. 15, 1935. 'H N DURHAM v WEB RENEWING MECHANISM 4 Sheets-Sheet 3 Filed Jan. 14, 1932 INVENTOR HOBART N. DURHAM AT1-oma y l Oct. 15, 1935. H. N. DURHAM WEB RENEWING MECHANISM Filedl Jan. 14, 1932 4 Sheets-Sheet 4 l INVENTQR I HOBART N. DURHAM Patented. Oct. 1'5, 1935 UNITED :STATES PATENT' OFFICE 'WEB RENEWING MECHANISM Hobart N. Durham, Jackson Heights, N. Y., as-

signer to The Goss Printing Press Company, Chicago, Ill., a corporation of Illinois Application January 14, 1932, serial No. 586,555

' solaims. (01.242-58) The present invention relates to web-renewing mechanism and more particularly to mechanism for joining the lead end of a reserve web roll to the running web as the web is fed to a printing press or other web-consuming machine.

Objects and advantages of the invention will be set forth in-part hereinafter and in part will be obvious herefrom,-or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities and combinations pointed out inthe appended claims.

The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and constituting a part hereof, illustrate one embodiment of the invention, and together with the description, serve to explain the principles of the invention.

Or the drawingsr- Figure 1 is a section taken on the line I-I of Fig. 2 and showing an illustrative embodiment of the present invention; Figure 2 is a section taken on the line 2-2 of Figure .1;

Figure 3 is a detailed section taken on the line 3-3 of Figure 1;

.Figure 4 is a fragmentary, sectional view illustrating 'the action of the braking means for vthe web roll supporting'arms;

Figures 5 and 6 are fragmentary side elevations, illustrating the operation of the automatic tripping means for setting the web renewing mechanism in operation; and

Figures 7, 8, 9 and 10 are diagrammatic views illustrating successive phases in the operation of the web-renewing mechanism.

The present invention has for its object the provision or' an automatic web-renewing mechanism for use in connection with printing presses or other web-consuming machines. Another object vof the invention is the provision of a webrenewing mechanism, for -making flying pasters, Y in which the movement of the reserve web roll from reserve to running position sets the reserve web roll in rotation and brings it to the speed of the running web. A further object of the in-` vention is the provision of a.' web-renewing mechanism in which the reserve web roll is brought eral description and the following detailed de- Y scrption as well, .are exemplary and explanatory to the speed of' the running Web by the gravitational movement of the reserve web roll as it l is vmoved to active or running position.

In accordance withuthe illustrative embodi-l ment of the invention, a pair of rotatable arms are 5 provided for rotatably and revolubly supporting an active'web roll, the reserve web roll being positioned at a higher level than the active roll from which the web lcd to the press. Means are provided for holding the web roll supporting 10 arms against movement as the web is fed to the press, and for releasing the arms as soon as the active web roll has worn down to a predetermined size. As soon as the arms are released, the greater weight of the reserve web roll rotates the i arms, bringing the reserve web roll to the position of the active roll. During this movement the energy released by this movement of the reserve roll is applied to rotate the reserve roll and bring it to the speed of the running web. Means 20 are also provided for checking the rotational movement of the web roll supporting arms, without impeding the free rotation of the reserve roll, and for finally bringing the web roll supporting arms to rest with the surface of the web roll contacting with the running web. After the reserve -roll reaches active position, the lead end of the reserve web is joined to the running web so that continued operation of the printing press may take place. Suitable braking means are provided for the web rolls, and these are preferably Ireleased from the reserve web roll while it is being brought to the speed of the running web.

It will be understood that the foregoing genof the invention, but are not restrictive thereof. Referring now in detail to the accompanying drawings, showing the illustrative embodiment of the invention, the web roll supporting means 4o comprise a pair of arms I0, II, rotatably mounted by means of a shaft I2 journalled in the side frames I3, I4 of the press. Near their ends, arms I0 and II are provided with freely-rotatable chucks I5, i6, rotatably supporting a reserve web 45 roll Il and an active web roll I8 by engagement with the axial orifices thereof. At least one of each pair vof chucks I5 and I6 is preferably axially movable to permitV new web rolls to be substituted for the exhausted rolls. w

` f :end of *11e rack terminates somewhat short of Arms I and are axially movable on their shaft I2, and set screws I9 cooperate with splines 2U to hold the arms against relative rotation and at the desired distance from each other. By variably positioning the arms with respect to each other, web rolls of different widths may be rotatably supported and fed to the printing press.

Suitable web guiding means are provided for guiding the web from the active web roll to the press and for this purpose a guide roller 2| and a presserroller 22 are rotatably mounted in the frame.

Meansgare provided for holding the web roll supporting arms against rotation as the running web is fed to the press, and the ends of the arms I0 and |I are formed with notches 24, cooperating with a detent` 25. Detents' 25 are pivoted in brackets 21 mounted on side frames I3 or I4 by means of shafts 26. and normally held in engagement with their respective notches 24 by means of springs 28. Means are provided for automatically releasing detents 25, and thereby permitting rotational movement of the web roll supporting arms I0 and II. As embodied, arms 3U, provided at their outer ends with freely rotatable rollers 3| are mounted on a shaft 32 extending between. the side frames I3 and I4, and held with their rollers 3| in engagement with the surface of the active web roll I8. Arms 3D are resiliently pressed upwardly by means of springs 33, coiled around shaft 32:. having their ends fastened to the side frames I3, I4 and collars 34 which are fixed to the shaft 32.

Arms 35 are fixed to the ends of shaft 32, and cooperate with levers 36 extending downwardly and fixed to shafts 26. Stops 31 are mounted on frames I3 and `|4 for limiting movement of the arm 36 and detent 25, between arm-holding and releasing positions. Arms 3D are preferably extensible in length and may be extended or retracted .to vary the position of rollers 3| with respect to the active web roll, thereby t'o determine the time of operation of the paster.

As the running web is fed from the active web roll I8, the size of the web roll gradually diminishes, with the roller 3| in Contact with the surface of the web roll, as shown in Fig. 5. As soon as the web roll has been suciently exhausted, rollers 3| and their supporting arms 36 are free to move past the web roll and to'the position Y shown in Figure 6,' thereby withdrawing detents 25 from the notches 24 and permitting the web tension to start rotation of the web roll supporting arms.

In accordance with the present invention, means are provided for settingthe reserve web roll in rotation and gradually bringing it yto the speed of the running web, and for accomplishing this by transforming the energy generated by the reserve web roll in moving to a lower level. For this purpose, the outer ends of the web roll chuck spindles I are provided with pinions 40, adapted to mesh with the teeth of. a relatively large and substantially semi-circular rack 4| mounted on the side frame I3, concentric with the supporting shaft I2. The upper end of rack 4| is preferably closely adjacent to the normal reserve position of the reserve web roll,.while the lower the normal position of an active web roll. By

-virtue `of this construction, the pinions 40 are in .aengagement with the rack 4`I during the major lower or active position. y f

Means are also provided for tensioning the web as it is fed from the active web roll, and as embodied, brake drums 45 are mounted on the chuck spindle shafts I5 and cooperate with pairs of brake shoes 46 mounted in brake arms 41 which 5 are pivoted to the web roll supporting arm I0 by means of the pivot pin 48. The outer ends of the brake arms 41 are connected together by means of a threaded member 49, threaded into the end of one brake arm 41, and loose within an aper- 10 ture in the other, spring 50 being compressed between one loose arm and hand wheel 5I.

Means are also provided for releasing the web tensioningymeansduring'rotation of the web roll supporting arms, thereby preventing the brakes from interfering with the acceleration of the reserve web roll. For this purpose, the inner ends of brake arms 41 are extended inwardly and are connected together by means' lof toggle links 50', each pair of which is -connected to a bar 5I, slidably mounted on arm I6 by means of a sleeve 52. Bars 5I, are'eachprovided attheir inner ends with a roller 53 which cooperates with a cam 54 mounted on side frame I3 and surrounding shaft I2. Cam 54 is provided with a pair ofv depres- 25 sions 55 at a position corresponding to the reserve Y and active positions of rollers 53, and when rollers 53 are opposite these depressions, rollers 53 are held out. of engagement with the cam and the brakes are applied with full normal tension. A: the web roll supporting arms are rotated to bring the reserve roll into active position, rollers 53 and the slidable rods 5| are' moved outwardly to release the brakes and thereby permit unimpeded rotation of the web rolls.

Means are also provided for checking the speed of rotation ofthe web roll supporting arms as the reserve web roll approaches running position, these means preferably operatingwithout interference with the rotational movement of the reserve web roll. As embodied, the rack 4I terminates slightly'above the bottom of travel of pinions 40, and in the space between the lower end of rack 4| and the active position of the web roll supporting arms is provided a braking member46 adapted to cooperate with the supporting arms. The outer ends of the web roll supporting arm I0 are rounded and provided with friction strips 66 firmly secured to the arms at one side of the notches 24. These friction strips are adapted to contactwith a reslliently pressed friction member during the last portion of the half revolutions of arm I0.

The resiliently pressed friction memberv comprises a recessed plate 63, into which is fitted a block of wood 64, or other friction material, the plate being pivoted along one edge by means of shaft 65, supported in thex sides of a frame 66 mounted on the side frame I3. Plate 63 and the friction block 64 are resiliently pressed upward- 60 ly towards the. web roll supporting arm I0,.- by means of a spring 61,' positioned between the free end of plate 6'3 and a seat 10 on the upper end of adjusting screw 69. Screw 69 extends downwardly through an aperture in the lower part of 14 to raise'or lower screw 69 and thereby vary the force of spring 61. The upper surface of friction block 64 is preferably concave, and in one position is substantially concentric with shaft I2, insuring a uniform, even contact with friction strips 60 as arms I and'II rotate.

Means are also provided for pressing the running webI against the reserve web roll, and for resiliently stopping rotation of the web roll supporting arms at the end of their movement. For this purpose, a small resilient roller is rotatably and slidably mounted in the side frames andis positioned in the path of movement of the reserve roll to Contact therewith as it is moved to running position. Roller 22, which may serve for this purpose, is preferably formed with a relatively thick coating of soft rubber, and is rotatably mounted in end blocks 18 which are horizontally slidable in a slideway 19. The roller is resiliently pressed towards the active web roll by means of Springs 80. At the end of the rotation of arms I0 and II, roller 22 is pressed slightly away from its normal position by contactvwith the active web roll, thus pressing the running web against the adhesively coated lead end of the reserve web roll. At the end of the movement of the reserve' web roll to running position, roller 22 is moved to the right (Fig. 1) by the momentum of the reserve roll, and the roller is held in this position, slightly compressing springs 80, by means of detent 25.

The operation of the illustrative embodiment of the invention is diagrammatically shown in Figures '1, 8, 9, and 10 of the drawings. Y A

In AFigure 1 of the drawings the reserve web roll I1 is supported above the active web roll I8, and the rolls are held in this position by detents 25 (Fig. 5) until the ,active'web roll I8 is practically exhausted. At that time, arms 30 are swung to the left (Fig. 6) releasing detents 25 and the web tension pulls on the active roll I8 to'start rotation of the web roll supporting arms I0 in a clockwise direction. As they rotate, pinion 40 corresponding to the reserve web roll I1,'meshes with rack BI and gradually accelerates the rotation of web roll I1 as it is`moved to active position.

After pinion 4D leaves the lower end of rack 4 I, the end of arm ID, provided with the friction strip S0, engages the upper face of friction block 64, and rotation of the web roll supporting arms I0 is gradually checked, thereby reducing the force with which the reserve web roll is moved against roller 22. As the reserve web roll I1 is moved to running position, the active web roll is raised to the upper or reserve position, and the running web continues to be fed from the roll I 8, as shown in Figure 8.

The reserve web roll I1 is finally brought to rest in active roll position, and roller 22 presses the running web against it, arms I0 and I I being held against movement by means of detents 25, this position of the parts being shown in Figure 9. The web drawn from the exhausted web roll I8 may then be severed, as shown in Figure 10, and the adhesive coated lead end ofthe reserve roll is pressed against the running web by means of roller 22, thereby joining the reserve web tothe running web and permitting continued and uninterrupted Operation of the printing machine.

The proportion and size of the various parts of the present embodiment may be varied within wide limits and are determined to a greater or less extent by the particularv operating conditions. The speed attained-by the reserve web roll as it is moved to running position depends largely upon the length of the web roll sup.

porting arms I0, the length of rack 4I, and the diameter of the web roll, but these factors may be varied in accordance with each other and the speed of rotation to be produced.v i

The invention in its broader aspects is not lirn` ited to the specific mechanisms shown and described but departures may be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advan,

tages.

What I claim ist- 10 1. Web renewing mechanism including in coml bination a pair of rotatable frames adapted to .revolubly support a plurality of web rolls; means for revolving a web roll as the frame rotates,

means for locking the frame after each movement thereof and means for automatically releasing LsaidI locking means on depletion of a Web roll. l

2. Web renewing mechanismincluding in combination means for supporting a running web 24j4 roll and a reserve web roll,-me`ans forv securing the leading end of the reserve web to the'running web, means for controlling the pasting by the size of the running web roll, means for braking the running web roll and means for releas- 25 ing the braking means while the reserve roll is being brought to the speed of the running web.

, 3. Web renewing mechanism including in combination a pair of rotatable web roll supporting arms, a running web roll and a reserve web roll revolbly mounted at'the ends of the arms, means for joining the leading end of the reserve web roll to the running web, means for braking the web rolls and normally applied to said running and reserve rolls and means for releasing the braking means while the arms are rotating.

4. Web renewing mechanism includingV in combination a support for a reserve weby roll and an active web roll, pinions fast with respect to each web roll, driving means engageable with said pino ions to set the reserve web roll in rotation, brake means for tensioning the web drawn from the active web roll and means for releasing said brakes wliile said reserve web roll is being driven.

5. Web renewing mechanism including in combination rotatable means for supporting a reserve web roll and an active web roll, braking means cooperating with said rotatable means to check rotation thereof as a reserve web roll is brought to active position by rotation of said first means and a stop for holding said rotatable means in a fixed position.

6. Web renewing mechanism including in combination rotatable means for supporting a reserve web roll and an active web roll and a guide roller mounted at one side of the active web roll said roller being positioned to cause la. substantial turning moment to be exerted on the rotatable means in the direction of movement of said rotatable means as the active web roll approaches exhaustion.

7. Web renewing mechanism including in combination rotatable means for supporting a reserve web roll and an'active web roll and a guide roller positioned a substantial distance from the axis of the active web roll in running position and in the direction of movement of the active web roll as it is moved from running position whereby a. substantial turning moment is setup as the active web roll becomes exhausted.

8. Web renewing mechanism including in cornbination a rotatable support for a plurality of web rolls including an active web roll and a. reserve web roll, a roller positioned in the path of movement of said rolls as the support isfrotated to engage the surface of a `full roll but ing the reserve roll, and a guide roller mounted clear an exhausted web roll, said roller serving at one side of the active web roll said roller being to limit rotation of the support and to press the positioned tocause a substantial turning moment running web against the reserve web roll. to be exerted on the rotatable means in the direc- 5 9. Web renewing mechanism including in comtion of movement of said rotatable means as the 5 bination rotatable means for supporting a reserve active web roll approaches exhaustion. web roll and an active web roll, means for lrotat- HOBART N. DURHAM.