US2308862A - Delivery mechanism for printing presses - Google Patents

Description

Jan. 19, 1943. c. s. CRAFTS 2,308,

DELIVERY MECHANISM FOR PRINTING PRESSES Filed July 24, 1940 TTORNEYS I Patented Jan. 19, 1943 DELIVERY MECHANISM FOR PRINTING "PRES SES Curtis S. Crafts, Oak Park, 111., assignor to The Goss Printing Press Company, Chicago, 111., a corporation of Illinois Application July 24, 1940, Serial No. 347,153

6 Claims.

This invention relates to rotary printing presses, and more particularly to certain improvements in the delivery mechanism of such printing presses for the production of magazines and similar publications.

Printing presses of the class described are customarily provided with delivery mechanisms the function and operation of which is to receive the continuous webs of paper after they have passed through the printing process, to out thecontinuous webs into sheets of a desirable size for the particular magazine or publication, and .to fold said sheets for the final assembly of the product. A conventional method for cutting the webs and folding the sheets consists in passing the web between cooperating rolls or cylinders which are provided with knives for cutting the web transversely of its length, pins for holding the sheets thus formed to the periphery of one of the cylinders, folding the sheets by means of folding blades on that cylinder, and passing the folded sheets to a third cylinder, or delivery cylinder, which completes the fold and deliversthe product. Under modern printing conditions a large number of superimposed continuous webs are accommodated at the same time between the cooperating cutting and folding cylinders, and the cylinders must be made to exert a considerable force upon the webs between in order that the cutting and holding operations may be successfully executed.

It is an object of the present invention to provide a pair 'of cutting and creasing cylinders which will accommodate a large number of webs, and likewise efficiently perform the cutting and holding operations. Another object is to provide a pair of cylinders which will accommodate several webs without allowing wrinkling or disalignment in any of the webs. A further object is to provide a pair of cutting and folding cylinders with margin rings which will have a long and efiicient life, and which may be easily removed or installed when replacement or repair is necessary. Further objects of the invention and novel features of the construction will be apparent from the following specification, when considered together with the accompanying drawing.

In accordance with the present invention one cylinder of a pair of cutting and folding cylinders is provided with sets of arcuate bands of resilient material disposed upon the periphery thereof and so spaced that each set fits against the web at a margin of the printed matter, while the other cylinder is provided with sets of non-resilient arcuate bands disposed upon the periphery thereof and spaced to lie opposite and cooperate with the sets of arcuate bands of resilient material on the first mentioned cylinder. Means are provided for mounting both the resilient and nonresilient type of bands upon the periphery of its respective cylinder.

Referring now to the drawing:

Fig. 1 is a fragmentary view in top elevation of a pair of cutting and folding cylinders embodying the invention;

Fig. 2 is a fragmentary view in transverse cross-section of the cylinders taken along line 22 of Fig. 1;

Fig. 3 is a fragmentary view in longitudinal cross-section, on an enlarged scale, of one of the cylinders taken along line 3-3 of Fig. 1; and

Fig. 4 is a fragmentary view in longitudinal cross-section, on an enlarged scale, of the other cylinder, taken along line 4-4 of Fig. 1.

As shown in Fig. 2 the cutting and folding cylinders l0 and II are of the conventional design, provided with cutting and folding blades of any suitable description. In the construction shown cylinder in is provided with folding blades I2, and cutting knives IS, the latter fixedly mounted between resiliently supported cheek blocks M to cooperate during the cutting operation with the slot IS in the cutting bar l6 of cylinder H. Cylinderv i0 is provided with sheet or web holding devices consisting of the impaling pins H and any of the usual mechanism for actuating said pins (not shown).

In order to provide cylinder l0 with'a resilient frictional contact to the web or sheets, arcuate bads E8 of rubber are provided upon the periphery of said cylinder. Corresponding arcuate bands !9 with knurled upper surfaces are positioned on the periphery of cylinder H, as shown in Fig. 4.

As shown in Fig. 3 the arcuate band I8 is of trapezoidal cross-section and is clamped in groove 20 of the arcuate carrier bar 2| by the arcuate clamping member 22 which is held by screw 23 threaded into carrier bar 2|. Carrier bar 2| is accommodated in the groove 24 of cylinder l0 and is adjustably secured thereto by bolt 25 threaded into the nut 26. Downwardly diverging sides of the nut 26 have clamping engagement with the diverging sides of slot 21 which extends longitudinally of the axis of the cylinder from one side of groove 24 to a hole 28 adjacent the other side of said groove. A smaller slot 29 is provided along the bottom of slot 21 to provide clearance for the ends of the bolts 25 extending below nuts 26.

With the construction shown it will be apparent that cylinders i and Ii may be positioned with their peripheries sufficiently close together to provide for the emcient operation of the cutting knives i3 and the impaling pins ll upon the intervening webs or sheets, and that the force exerted by bands I! and I9 upon the webs or sheets will be sufficiently resilient to prevent the inner webs from being forced out of alignment with the two outer webs and to provide for preserving the surface of the two outer webs, but at the same time maintaining the necessary frictional contact with the webs or sheets.

. It will also be apparent that the bands II are firmly positioned on the periphery of cylinder ll and may be easily adjusted or removed. The

angular side of groove 20 and the angular side of clamping member 22 while engaging opposite side surfaces of band I! provide an absolute anchor for that member.

when it is desired to mount the resilient bands on the periphery of cylinder ll, the bands II are fitted into groove 10, clamping bars 22 placed beside the bands and screw 23 threaded into carrier bar 2 i That bar is then positioned in groove 24 and secured by engaging bolt II in nut ll which has been let down through hole, to slot 21 and slid therealong to the desired position.

While the invention has been described with considerable particularity, it will be appreciated by those skilled in the art that the invention is of wider application and not limited to the particular application described nor to the embodiment illustrated in the drawing.

What I claim is:

i. In a printing press the combination with one of a pair of cutting and folding cylinders of a plurality of sets of arcuate bands of resilient material of trapezoidal cross-section, a. plurality of sets of carrier bars having longitudinal grooves to carry said bands, said grooves having an inwardly inclined surface wall to face with the oppositely inclined side wall of said bands, and arcuate clamping members to be fixed in said longitudinal grooves parallel to said bands, one side of said clamping member having an inwardly inclined surface to face with the oppositely inclined side of said band thereby anchoring said band in said groove of said carrier bar, said bar being positioned in a depression in said cylinder transverse the axis thereof and adiustably attached therein.

2. In a printing press the combination with one of a pair of cutting and folding cylinders of a plurality of sets of arcuate bands of resilient material of inwardly enlarged cross-section, and a plurality of sets of carrier bars having a correspondingly shaped groove with a removable wall, said wall serving to anchor said band in said groove and to allow for its removal therefrom. said carrier bars being positioned in a depression in said cylinder transverse the axis thereof and adjustably attached therein.

3. In a printing press the combination with one of a pair of cutting and folding cylinders of a plurality of sets of substantially wedge shaped arcuate bands of resilient material, a plurality of sets of arcuate carrier bars having correspondingly shaped longitudinal grooves to carry said bands, means for removably anchoring said bands in said grooves, and means for removably and adjustably mounting said carrier bars in a depression in said cylinder transverse the axis thereof.

4. In a printing press the combination with a I pair of feeding cylinders of a plurality of circumferentially extending arcuate bands of resilient material mounted on the periphery of one of said cylinders and a plurality of circumferentially extending non-resilient arcuate bands mounted on the periphery of the other cylinder to register with said resilient arcuate bands, said bands cooperating to exert a yieldable force upon the webs and sheets between.

5. In a printing press the combination with a pair of feeding cylinders of a plurality of circumferentially extending arcuate bands of resilient material mounted on the periphery of on of said cylinders and a plurality of circumferentially extending non-resilient arcuate bands mounted on the periphery of the other cylinder to register with said resilient arcuate bands, said bands being spaced upon said cylinders to contact and exert a yieldable force upon the marginal portion of the intervening webs and sheets.

6. In a printing press the combination with one of a pair of feeding cylinders of a plurality of arcuate bands of resilient material. a plurality of sets of carrier bars having longitudinal grooves to carry said bands, and arcuate clamping members to be fixed in said longitudinal grooves parallel to said bands, said bar being positioned in a depression in said cylinder transverse the axis thereof and adiustably attached therein.

CURTIS 8. CW8.

Images