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Publication numberUS3865361 A
Publication typeGrant
Publication dateFeb 11, 1975
Filing dateSep 11, 1973
Priority dateSep 11, 1973
Publication numberUS 3865361 A, US 3865361A, US-A-3865361, US3865361 A, US3865361A
InventorsNeal Frank
Original AssigneeJohn C Motter Printing Press C
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Folder cylinder
US 3865361 A
Abstract
A rotatable folder cylinder includes a plurality of pin members mounted on a rotatable shaft extending axially of the cylinder. A rotatable cam arranged at one end of the shaft has an annular groove in a face presented to the shaft end. Two pairs of camming surfaces are formed in the groove, one farther from the face of the cam than the other. A cam follower mounted on the end of the shaft and carrying two roller bearings travels on either pair of camming surfaces, depending on whether the folder cylinder is operated in the collect mode or the straight mode. The cam is movable axially of the cylinder to shift the cam follower and its roller bearings from one pair of camming surfaces to the other. A locking mechanism holds the cam in its axial positions corresponding to straight and collect operation, respectively. An adjustable gear train for the cam permits timing adjustments of the pin members. The folder cylinder is also provided with an adjustable quadrant gear lock-up for holding one of its folder blades against rotation when in a silenced position.
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Description  (OCR text may contain errors)

0 United States Patent [1 1 [111 3,865,361

Neal Feb. 11, 1975 FOLDER CYLINDER Primary ExaminerWm. H. Grieb Attorney, Agent, or Firm-Brumbaugh, Graves, [75] Inventor. Frank Neal, L1titz, Pa. Donohue & Raymond [73] Assignee: John C. Motter Printing Press C0.,

York, Pa.

' [57] ABSTRACT [22] Filed: Sept. 11, 1973 A rotatable folder cylinder mcludes a plurality of pin [2]] Appl. No.: 396,248 members mounted on av rotatable shaft extending axially of the cylinder. A rotatable cam arranged at one [52] US. Cl. 270/76, 101/411 end of the Shaft has an annular groove in a face P [51] Int. Cl B65h 45/16 emed to the shaft TWO Pairs of Camming Surfaces [58} Field of Search 270/63-65, are formed in the groove, one farthsr from the face of 270 7047 43; 101 the cam than the other. A cam follower mounted on the end of the shaft and carrying two roller bearings 5 References Cited travels on either pair of camming surfaces, depending UNn-ED STATES PATENTS on whether the folder cylinder is operated in the collect mode or the straight mode. The cam is movable 223315231 21133? fiir' ii'fjiif"""iijjijijijf'iii: 333/13 axially of h cylinder to Shift the cam follower and its 2,797,085 6/1957 Crafts 270/65 bearmgs q one cammmg 2,919,914 1/1960 Harless 270/77 other; lockmg mechfmlsm hold? the cam 3,020,042 2/1962 Worthington et al... 270/77 9X19] poslllons correspondmg t0 stralght and Collect 3,038,719 6/1962 Tyma 270/77 X Operation respectively An adjustable gear train for 3,460,823 8/1969 Neal et a1. 270/77 the cam permits timing adjustments of the pin mem- 3,486,748 12/1969 Smiltens '270/ 7 bers. The folder cylinder is also provided with an ad- 3'5l71920 6H970 y 270/77 justable quadrant gear lock-up for holding one of its 3,787,042 Hertrich .,270/70 folder blades against rotation when in a silenced position.

PATENTED FEB] 1 I975 v 3.865.136 1 sum 10F e PATENTEI] FEB] 1 I975 SHEET 3 OF 6 FOLDER CYLINDER BACKGROUND OF THE INVENTION In printing a publication, such as a newspaper, printed images are applied to continuous webs or ribbons of paper, which are then cut to size and folded. In conventional apparatus for cutting and folding the webs of paper, each web is first passed between two closely spaced and rotating cylinders, designated a folder cylinder and a cutting cylinder, respectively. A set of pins projecting from the circumference of the folder cylinder pierces the leading edge of the paper web and carries the web around the circumference of the folder cylinder. When the web has been wound a selected distance about the folder cylinder, for example, a distance corresponding to the width of a double page of newspaper, the web is cut and a second set of pins engages the new leading edge of the paper web formed by the cut. Cutting is effected by one or more cutting blades mounted adjacent the circumference of the cutting cylinder, which is geared to rotate in appropriate relationship with the folder cylinder.

Simultaneously with the cutting of the paper web, the first set of pins retracts into the cylinder to disengage the severed length of paper and a folder blade extends outwardly from the circumference of the cylinder at a point corresponding to the longitudinal midpoint of the severed paper length. The folder blade pushes the severed length of paper between a pair of pairs of oppositely rotating folding or tucking rollers. Because of their counter-rotation, the folding rollers pinch the length of paper and then draw it between them, producing a crimp or fold and also removing the paper from the folder cylinder. As the now folded, severed length of paper emerges from the opposite side of the folding rollers, it falls between two adjacent blades of a delivery fan that rotates beneath the rollers. The folded paper length rotates with the fan through approximately l80, until it is dropped from the fan onto a conveyor.

When the folder cylinder is operated as described above, so that each successively severed length of paper is immediately removed from the cylinder, the operation is termed a straight run. In another mode of operation, the first set of pins holding the leading edge of the paper web is not retracted when a length of paper is severed from the web, nor is a folder blade extended to push the severed length between the folding rollers. Instead, the length of paper is carried on the folder cylinder for one complete revolution so that a second length of paper is wrapped on top of the first. When the second length of paper is severed from the continuous web, the first set of pins, now holding both lengths of paper, is retracted and a folder blade is extended, as in a straight run. Such operation of the folder cylinder is termed a collect run. in either mode of operation, the web of paper, and hence the lengths severed from it, may comprise a number of webs that have previously been brought together to lie on top of each other.

One commonly used type of folder cylinder, often referred to as a 3:2 folder, utilizes three sets of pins and two folder blades. The sets of pins' are spaced equidistantly about the circumference of the cylinder and the pins of each set are arranged in a line along the length of the cylinder. The folder blades are rotatable about their longitudinal axes and are also mounted on a frame that rotates independently of the folder cylinder frame carrying the pins. The two rotational movements of the blades are timed so that each blade contacts alternate lengths of paper severed from the continuous web.

The use of three sets of pins on a 3:2 folder cylinder permits the cylinder to engage three severed lengths of paper in succession during one revolution. For proper operation of the folder blades in a straight run, therefore, the folder blade mounting frame must make three revolutions about its axis for every two revolutions of the folder cylinder. Collect operation of the folder blades is achieved by silencing one of the blades, i.e., holding it against rotation about its longitudinal axis so that it is not extended beyond the circumference of the folder-cylinder when presented to a severed length of paper engaged by the cylinder. Silencing a folder blade can be effected by disengaging the blade from its drive mechanism and locking the blade against free rotation. In the folder cylinder described and illustrated in Snyder US. Pat. No. 3,517,920, for example, one gear of the gear train for a tucking or folder blade is slid out of engagement with an associated driving gear and into engagement with a pin mounted in a fixed location on the folder blade housing or mounting frame.

While the use of a pin lock-up for a silenceable or collect folder blade is feasible,,it requires precise, and therefore expensive, fabrication of various folder cylinder components. As pointed out at column 3, line to column 4, line 8 of the Snyder patent, folder blades must occasionally be timed. In the Snyder folder cylinder, timing is initiated by disengaging the movable intermediate gear of the collect folder blade gear train from its driving sun gear. The locking pin is also re moved from the folder blade housing to permit the intermediate gear and the collect folder blade to rotate independently of the live folder blade. When the two folder blades have been oriented in properly timed relationship, the locking pin presumably is replaced in the folder blade housing to engage the intermediate gear. The hole for the locking pin in the folder blade housing thus must be carefully located so as to align with a groove between two gear teeth in the movable intermediate gear when the folder blades are properly timed. To insure proper location of the locking pin hole, each of the various gears of the two folder blade gear trains must also be precisely oriented on its mounting shaft, which requires precise cutting of the gear teeth with respect to the keyway in the gear hub for keying the gear on its shaft. Even if the locking pin hole were to be field drilled, for example, to assure proper location, replacement gears would still have to match exactly the gears to be replaced.

As described above, the folder blades for a folder cylinder can be conveniently shifted from straight to collect operation simply by disengaging one of the folder blades from its drive train. The pins for the folder cylinder,.however, can not be so easily shifted from straight to collect operation because all of the pins must continue to operate in both straight and collect runs. The difference between the two modes of operation for the pins lies in the timing for retracting each set of pins and thereby disengaging a length of paper held by the set of pins.

In a typical prior art folder cylinder, as described and illustrated, for example, in Harless US. Pat. No. 2,919,914, each of three sets of pins is mounted on an associated shaft extending axially along the cylinder.

The pin shaft is rocked in appropriately timed relationship by a crank mountedon one end of the shaft and carrying a pair of follower rollers. Each follower roller cooperates with one ofa pair of cams that are rotatably mounted adjacent the end of the shaft and receive the follower rollers for all three pin shafts.

Although theHarless patent does not disclose how to shift the pins from straight to collect operation, folder cylinders having outboard pin cams of the l-Iarless type have been shifted from straight to collect operation both by varying the rotational speed of the cams and by providing two differently configured, interchangeable cam segment inserts for each cam. Varying the rotational speed of a cam requires either a two-speed power source or a gear train that can be shifted to provide the two different rotational speeds. Both the two-speed power source and the shiftable gear train involve additional production costs and additional complexity that increases maintenance and the possibility of mechanical failure, as compared to a single-speed power source and a simple, non-shiftable gear train. The use of interchangeable inserts to change the configurations of the pin cams requires precise machining of the various cam parts. not only to insure interchangeability of the inserts, but also to avoid any unevenness at the joints between the cam inserts and the remainder ofthe cams, which might cause undesirable movement of the pins. Foreign material, such as paper dust, is also likely to find its way into the joint between each insert and its corresponding cam, increasing the wear on the cam parts.

Another prior art assembly for shifting pin operation from straight to collect, as described and illustrated in Hilgoe US. Pat. No. 2,797,084, utilizes a pair of adjacent, but differently configured cams for each folder cylinder pin member. The pairs of cams for the pin members of each set are all mounted on a single rotating shaft that is axially movable relative to the pin members to shift the pin members from one mode of operation to the other. The large number of cams, cam followers, and the additional cam shafts necessary for the assembly increase the possibility of mechanical failure and the expense of fabrication and assembly. The cams must also be produced on'precision duplicating equipment, which further increases production costs.

SUMMARY OF THE INVENTION The present invention is directed to a rotatable folder cylinder which overcomes the above-noted difficulties that are encountered when shifting a prior art folder cylinder from straight operation to collect operation or vice versa. The present folder cylinder includes at least one set of pin members coupled to a pin shaft and responsive to rotation of the shaft. A rotatable cam is arranged adjacent the'pin shaft and has at least two camming surfaces formed on one of its faces presented to the shaft. The cam is preferably arranged at one end of the pin shaft and two pairs of camming surfaces are preferably formed in an annular groove in the cam face presented to the shaft end, one farther from the cam face than the other. A cam follower is mounted on the end of the pin shaft adjacent the cam and carries a pair of roller bearings that travel on one or the other of the two pairs of camming surfaces. The pairs of camming surfaces are appropriately configured to effect operation of the pin members, through the pin shaft, in the straight and the collect mode, respectively. To shift the folder cylinder and the pin members from straight to collect operation or vice versa, the cam is moved axially relative to the folder cylinder, causing the cam follower to shift from one pair of camming surfaces to the other.

As can be seen from the above description, the present folder cylinder is a less expensive and more maintenance free folding mechanism than the prior art devices. Specifically, the provision of two differently configured pairs of camming surfaces in the outboard cam of the present invention avoids the additional production and maintenance expenses of either a two-speed power source or a shiftable gear train for the cam. The precise machining and increased wear likely with cam inserts are also eliminated. At the same time, the present invention avoids the multiplicity of components and the attendant increased production costs of providing cam member pairs for each pin member.

In a preferred embodiment of the invention, axial movement of the pin cam is accompanied by axial sliding movement of a cam control rod coupled to the cam. To insure that the cam will not accidentally be moved out of position during operation of the folder cylinder, a locking mechanism holds the control rod in aselected axial position. One end of the rod extends through the folder cylinder frame and has a groove encircling it. The groove is engaged by one of a pair of eccentrically coupled shafts that rotate about the longitudinal axis of the second shaft. The free end of the second eccentric shaft is square so that it can be turned with a wrench, for example, to rotate both eccentric shafts and shift the cam from one operating position to the other. A slot is formed in the square end of the second eccentric shaft and it receives a bladed member pivotally mounted adjacent the slotted end. The slot and the bladed member are oriented so that the bladed member can be seated in the slot only when the cam control rod is either fully extended from or fully retracted in the folder cylinder frame. The locking mechanism thus insures that the cam is either in the straight run position or in the collect run position and not in an intermediate position. The bladed member is also coupled to a switch that interrupts power to the folder cylinder or to the entire printing press if the bladed member is not seated in the slotted end of the second eccentric shaft.

The pin cam has a gear train that can be adjusted to vary the timing of the pin member operation. The gear train includes a driving gear, a driven gear coupled to the cam, and a pair of intermediate gears. One of'the two intermediate gears is carried on a lever pivotally and concentrically mounted relative to the driving gear. Pivotal movement of the lever effects limited epicyclic movement of the intermediate gear and thereby adjusts the timing of both the pin cam rotation and the resultant operation of the pin members.

The collect folder blade for the preferred embodiment of the present folder cylinder is provided with an adjustable lock-up. When the folder blades for the cylinder are timed, the position of the lock-up can be adjusted so that the lock-up will properly mesh with the gear train for the collect blade. The adjustable lock-up, together with adjustable mountings for the folder blades, eliminates the need for precisely controlled fabrication of the gears for the folder' blade gear trains.

BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the invention, reference may be made to the following description of an exemplary embodiment, taken in conjunction with the figures of the accompanying drawings, in which:

FIG. 1A is a sectional view of one end of a folder cylinder according to the invention;

FIG. 18 is a sectional view of the other end of the folder cylinder of FIG. 1A;

FIG. 2 is an end view of the folder cylinder of FIGS. 1A and 1B, taken from the end of the cylinder shown in FIG. 1A; I

FIG. 3 is a top view of the pin cam locking mechanism shown in FIG. 2, taken along view line 3-3 of FIG. 2;

FIG. 4 is a view taken along view line 44 of FIG.

FIG. 5 is a top view, partly in section, of the end of the folder cylinder shown in FIG. 1A in which the cam followers are out of phase relative to FIG. 1A;

FIG. 6 is a sectional view taken along view line 6-6 of FIG. 2 but inverted with respect to FIG. 2;

FIG. 7 is an end view of the folder cylinder of FIGS. 1A and 1B, taken through the center of the cylinder and looking toward the end of the cylinder illustrated in FIG. 18;

FIG. 8 is a view, partly in section, taken along view 22 and 24 carried by the camfollowers 20. The bearings 22 travel on either of tracks 26 or 30, while the bearings 24 travel on either of tracks 28 or 32. The use of dual tracks in the groove 18 reduces wear on each of the bearings 22 and 24 and also reduces the bending stress exerted on the cam followers 20.

The configurations and relative orientation of the two pairs of tracks 26, 28 and 30, 32 in the cam 14 is best illustrated in FIG. 4. As can be seen, the otherwise circular tracks 30 and 32 have a single flattened portion or node, while the tracks 26 and 28 have a pair of circumferentially spaced apart flattened portions. The flattened portion of the tracks 30 and 32 is located immediately behind the right-hand flattened portion of tracks 26 and 28, as viewed in FIG. 4. Each of the flattened portions of the tracks 26-32 causes corresponding rotation of each pin shaft 12 as its cam follower travels over the flattened portion. As indicated in FIG.

line 88 of FIG. 7, showing the collect folder blade gear train in position for collect operation; and

FIG. 9 is a view, partly in section, taken along view line 8-8 of FIG. 7, showing the collect folder blade gear'train in position for straight operation.

DESCRIPTION OF EMBODIMENT FIGS. 1A and 1B of the drawings illustrate, in axial cross-section, a 3:2 folder cylinder according to the invention. The adjustable bands that define the exterior surface of the folder cylinder have not been illustrated for convenience in describing the present invention, but the hands, if shown, would encircle the cylinder about its longitudinal axis.

As illustrated in FIGS. 1A, IB, and 7, three sets of pin members 10 are mounted on three pin shafts 12 spaced at equal distances about the circumference of the folder cylinder. The pin members 10 of each set are arranged in a line and spaced axially apart along their respective shaft 12. The pin members 10 are secured to the shaft 12 so that they normally project through the periphery of the folder cylinder, between the adjustable bands (not shown), to engage the leading edge of a web of paper 13 presented to the folder cylinder. Rotation of the shaft 12 causes the pin members 10 to retract into the folder cylinder, as shown in the lower left-hand corner of FIG. 7. Reverse rotation of the shaft 12 causes the pin members 10 to resume their normal position.

Mounted adjacent the left-hand ends of the pin shafts 12, as viewed in FIG. 1A, and concentric with the folder cylinder is an annular pin cam 14. The face 16 of the pin cam 14 which is presented to the left-hand ends of the pin shafts 12 has a groove 18 formed in it. The groove 18 accepts three cam followers 20, one mounted on the left-hand end of each pin shaft 12.

.Each cam follower 20 resembles a crank and carries two roller bearings 22 and 24 on its free end.

The groove 18 in the pin cam 14 has two pairs of raised tracks 26, 28 and 30, 32 projecting from its side walls at axially spaced locations thereon. The tracks of each pair afford running surfaces for the roller bearings 4, the pin members 10 associated with the shaft 12 are first retracted to release the severed length or lengths of paper held by them and are then returned to their normal projecting positions.

In operation, when the cam 14 is moved to its farthest right-hand position, as shown in FIGS. 1A, 4 and 5, by a mechanism described hereinafter, the roller bearings 22 and 24 of the cam followers 20 travel on the pair of tracks 30, 32 in groove 18 and the pin members 10 operate in the collect mode. When the cam 14 is moved to its farthest left-hand position, as viewed in FIG. 1A, the roller bearings 22 and 24 travel on the pair of tracks 26, 28 and the pin members 10 operate in the straight mode. Shifting of the cam followers 20 from one pair of tracks to the other is achieved at a point or points where the tracks 28 and 30 and the tracks 26 and 32 are disposed at the same positions radially in the cam 14. In the illustrated embodiment of the invention, the pin cam 14 must rotate 50 percent faster than the folder cylinder and the pin shafts 12, for example, at 600 rpm. and 400 rpm, respectively, for properly timed operation of the pin members 12.

To facilitate axial movement of the cam 14, it is fastened, along its radially inward side edge, by lug bolts 34 to a smaller diameter, annular cam hub 36. The cam hub 36 is longer than the cam 14 and one end 38 of the cam hub extends axially away from the cam, to the left as viewed in FIG. 1A. The radially outward surface of the end 38 of the cam hub 36 is machined to provide gear teeth 40 that form part of the gear train, described hereinafter and illustrated in FIGS. 2 and 6, for rotating the cam 14. The cam hub 36 is, in turn, coupled for relative rotation to a smaller diameter annular sleeve 42. The coupling is achieved by interposing a pair of bearings 44 between the outer circumference of the sleeve 42 and the inner circumference of the cam hub 36 and holding the bearings against axial movement relative to either the sleeve or the cam hub. Since the cam hub 36 is rotatable relative to the sleeve 42, the hub and the cam 14 are free to rotate as driven by the gear train acting on the gear teeth 40 on the hub.

The sleeve 42 is carried on an annular support 46 that has a flange 48 at one end. The flange 48 is bolted to the folder cylinder frame 50 and thus forms a part of the frame. A cylindrical cam control rod 52 is received in the central opening of the annular support 46. The control rod 52 is coupled to the sleeve 42 by a dowel 54 that passes through a bore 56 traversing the control rod and through a pair of aligned holes 58 in the sleeve. A pair of aligned slots 60 in the support 46 permit the dowel 54 to pass through the support and to move axially relative to the support, when the cam 14 is shifted from one operating position to the other.

One end of the control rod 52 projects from the lefthand end of the support 46, as viewed in FIG. 1A, and is encircled by annular groove 62. The groove 62 receives one end of a stub shaft or lug 64 mounted adjacent the outer circumference ofa disc 66 disposed with its central axis oriented radially of the longitudinal axis of the control rod 52. The disc 66 is, in turn, mounted on one end of a second stub shaft 68 that extends from the disc 66 on the opposite side thereof from the lug 64. The lug 64, disc 66, and stub shaft 68 may be formed as separate components or as an integral unit and all are enclosed by an appropriately configured cover 70, which also encloses the projecting end of the control rod 52.

As can be seen in FIG. 1A, the free end 72 of the stub shaft 68 is squared off, for example, so that it can be engaged by a wrench or other tool. The cover 70 is also spaced from the end 72 of the stub shaft 68 to afford the room necessary for the tool to be placed over the shaft end. Axial movement of the cam 14 to shift operation of the folder cylinder pin members from straight to collect operation, or vice versa, is thus achieved by turning the stub shaft 68, which causes axial movement of the control rod 52, the sleeve 42, the cam hub 36, and, finally, the cam 14.

To ensure that the stub shaft 68 is not accidentally rotated to shift the operating position of the cam 14, the square end 72 of the shaft 68 is provided with a slot 74. The slot 74 receives a blade 76 formed on one surface of a cap member 78 pivotally mounted on the flange 48 of the support 46, as shown in FIGS. 2 and 3. Pivotal movement of the cap member 78 engages or discngages the blade 76 with the slot 74 to lock or release the stub shaft 68. Since the blade 76 is aligned to engage the slot 74 only when the stub shaft 68 is rotated to one of two positions spaced 180 apart, appropriate orientation of the slot 74 on the shaft end 72 ensures that the control rod 52 is either fully extended from or fully received in the support 46 when engaging alignment is attained. The cam 14 must, therefore, be in one or the other of its two operating positions, rather than in an intermediate position, when the blade 76 is seated in the slot 74.

As further protection against inadvertent or malicious shifting of the cam 14 during operation of the folder cylinder, the cap member 78 is connected by a linkage 80 to a microswitch 82. The microswitch 82 is electrically connected into the electric circuit (not shown) supplying current to operate either the folder cylinder alone or the entire press assembly. When the switch 82 is open, current to the folder cylinder or the press is interrupted and the cylinder or press can not be operated. In the illustrated embodiment of the locking mechanism, the microswitch 82 interrupts the current when the cap member 78 is tipped more than 5out of its horizontal position in which the blade 76 is seated in the slot 74.

To meet applicable safety regulations, the locking mechanism is also explosion proof. A pneumatically actuated piston 84 is mounted by a pair of brackets 86 on the flange 48 of the support 46. The plunger 88 projecting from the piston 84 engages a recess formed in the free end 90 of the cap member 78. When the plunger 88 is fully extended and received in the recess, the cap member 78 can not pivot out of locking engagement with the stub shaft 68. The plunger 88 is normally in an extended position and the piston 84 must, therefore, be energized to release the cap member 78. The energizing circuit for the piston 84 may also be connected into the power circuit for the folder cylinder or the press assembly so that when the piston is energized, the power to the folder cylinder or the press is interrupted.

As previously described, the cam hub 36, which is fastened to the pin cam 14, has gear teeth 40 that form part of the gear train for rotating the cam. As shown in FIGS. 2 and 6, the gear train also includes two intermediate gears 92 and 94 and a driving gear 96. The driving gear 96 is mounted on a cross-shaft 98 coupled to a power source (not shown). Power to rotate the cam 14 is supplied from the driving gear 96 through the intermediate gear 94 to the intermediate gear 92 and then to the gear teeth 40 formed on the cam hub 36. The intermediate gear 92 is mounted on a shaft 100 which is located at a fixed position on the folder cylinder frame 50. The intermediate gear 94, however, is mounted on a shaft 102 carried on one end of a lever arm 104 pivotally and concentrically mounted about the cross-shaft 98.

Pivotal movement of the lever arm 104 effects epicyclical motion of the intermediate gear 94, within limits set by its necessary engagement with the intermediate gear 92, and thereby varies the timing, relative to the operation of the folder cylinder folder blades, of the operation of the pin members 10. Such an adjustment of the pin member timing may be necessary, for example, because of variations in the thickness of the paper web being folded. The pivotal movement of the lever arm 104 is accomplished by turning the square, free end 106 of a worm 108 and thereby moving a worm ring 110 coupled to a tang 112 extending from the lever arm 104. The worm ring 110 is pivotally coupled to the tang 112 and the worm 108 is pivotally mounted, by a mounting ring 114, on the cylinder frame to allow pivotal movement of the lever arm.

The cross-shaft 98 also carries a driving gear 116 which drives the gear train, generally designated 118, for the folding rollers 120. The folding rollers 120 operate as generally described above and as illustrated in FIG. 7.

FIG. 1B of the drawings illustrates the right-hand end of the folder cylinder, the left-hand end of which is illustrated in FIG. 1A. FIG. 18 illustrates, in particular, the live folder blade 122 for the folder cylinder. The collect folder blade 124 is not shown in FIG. 1B for convenience, but the relative locations of the two folder blades are indicated in FIG. 7 and in FIG. 1A, in which-the mounting shaft 126 for the collect folder blade is shown in part. Both folder blades 122 and 124 are slotted at intervals along their lengths to accommodate the adjustable bands (not shown) for the folder cylinder.

As shown in FIG. 1B, the live folder blade 122 is bolted, or otherwise secured, to its mounting shaft 128. The right-hand end of the mounting shaft 128 is, in turn, secured by lug bolts 130 to the left-hand end of a pinion shaft 132. The lug bolts 130 pass through arcuate slots in a flange 134 formed adjacent the end of the mounting shaft 128 and into threaded holes in a flange 136 formed at the end of the pinion shaft 132.

The pinion shaft 132 carries a pinion gear 138 that is keyed onto the pinion shaft. To complete the gear train for the live folder blade 122, the pinion gear 138 meshes with an intermediate gear 140, shown in FIGS. 8 and 9, mounted on an intermediate gear shaft 142. The intermediate gear 140 meshes with a sun gear 144 mounted concentrically with the folder cylinder and coupled to power source (not shown). A similar gear train and mounting shaft-pinion shaft connection are provided for the collect folder blade 124, and the corresponding parts are indicated with primed reference numerals in the drawings. I

As can be seen in FIGS. 18, 8, and 9, the gear teeth on the pinion gear 138 for the collect folder blade 124 extend the entire length of the gear. On the other hand, the gear teeth 150 and 152 on the intermediate gear 140' and the sun gear 144, respectively, are separated axially into two halves. Thus, while the pinion gear 138' always meshes with the intermediate gear 140', axial movement of the intermediate gear 140' relative to the sun gear 144 causes the intermediate gear and the sun gear to engage with or disengage from each other, as shown in FIGS. 9 and 8, respectively. When the intermediate gear 140 and the sun gear 144 are disengaged, the collect blade 124 is silenced, or rendered inoperative, as described above in general terms. Relative axial movement of the intermediate gear 140 is achieved by axial sliding movement of its shaft 142. Sliding movement of the shaft 142 is effected by an eccentric 'assembly 154 generally similar to the lug 64, disc 66, and stub shaft 68 utilized to achieve axial movement of the cam 14 and described above.

The intermediate gear shaft 142 is held against accidental axial movement by a spring loaded slide 156 that engages either of two slots 158 in the shaft. The slots 158 are spaced axially apart along the shaft 142' to correspond with the two operating positions of the intermediate gear 140' relative to the sun gear 144. Accidental rotation of the intermediate gear 140' and the collect folder blade 124, during collect operation of the folder cylinder, is prevented by a lock-up in which a quadrant gear 160 meshes with the intermediate gear 140'. The quadrant gear 160 is mounted on one end of a stub shaft 162 held in place on the folder blade mounting frame by a bushing 164 that has a lug 166 projecting from one end. The major portions of both bushing 164 and the stub shaft 162 extend into the folder blade mounting frame, so that the lug 166 contacts the exterior surface of the frame. A screw 168 inserted through holes in the lug 166 and the folder blade mounting frame secures the bushing 164 to the frame.

The stub shaft 162 is rotatable in the bushing 164 to adjust the engagement of the quadrant gear 160 with the intermediate gear 140'. To facilitate rotational adjustment of the stub shaft 162 and the quadrant gear 160 mounted thereon, an adjustment lever170 is keyed onto the end of the stub shaft 162 projecting from the side of the folder blade mounting frame. When the quadrant gear 160 has been properly adjusted, it is held in place by a stop 172 that is bolted to the folder blade frame by a lug bolt 174 and frictionally engages the adjustment lever 170.

The adjustment possible with the quadrant gear 160 eliminates having to key the position at which the gear projects into the folder blade mounting frame to the relative orientation of the gear teeth 150 of a properly timed intermediate gear for the collect folder blade 124. The benefits of the adjustable lock-up are more fully realized when one considers that the slots provided in the flanges formed at the ends of the folder blade shafts permit adjustment of the orientation of the folder blades relative to their pinion gears. Because both the lock-up and the connections between the folder blade shafts and the pinion shafts are adjustable, the folder blades 122 and 124 can be roughly timed by: (l disengaging the collect folder blade gear train from the sun gear 144; (2) moving the quadrant gear axially out of engagement with the intermediate gear 140'; (3) rotating the collect blade gear train relative to the live blade gear train; and (4) re-engaging the collect blade gear train with the sun gear 144. Fine adjustment of the timing is accomplished by adjusting the relative orientation of the two mounting shafts and their corresponding pinion shafts. The lock-up is then replaced axially in the folder blade mounting frame and rotated as necessary to engage the intermediate gear 140'. Since the various gears do not need to be oriented precisely on their shafts, the gear teeth do not have to be cut in exact relation to the keyways formed in the interior surfaces of the gears. Considerable expense and the possibility of machining error is thus eliminated from the gear production.

It will be understood that the above described embodiment is merely exemplary and that those skilled in the art may make many variations and modifications without departing from the spirit and scope of the invention. All such modifications and variations are intended to be within the scope of the invention as defined in the appended claims.

I claim:

1. A rotatable folder cylinder comprising a rotatable shaft, a plurality of pin members coupled to the shaft and responsive to rotation thereof, a cam having at least two camming surfaces thereon, and a cam follower coupled to the shaft to effect the rotation thereof and adapted to travel on each of the camming surfaces, the cam and the shaft being adapted for relative axial movement selectively to transfer the cam follower between the camming surfaces, the two camming surfaces being disposed at discrete axial locations on the cam and being configured to effect operation of the plurality of pin members in the collect mode and in the straight mode, respectively.

2. A rotatable folder cylinder according to claim 1, wherein the cam is rotatable.

3. A rotatable folder cylinder according to claim 1, wherein the two camming surfaces are located in an annular groove formed in an exterior surface of the cam, one of the camming surfaces being located in the groove farther from said exterior surface of the cam than the other of the camming surfaces.

4. A rotatable folder cylinder according to claim 1, wherein the cam is disposed at one end of the shaft.

5. A rotatable folder cylinder according to claim 1, wherein the shaft is held in a fixed axial position and the cam is movable axially relative to the shaft.

6. A rotatable folder cylinder according to claim 5, further comprising an axially movable control rod coupled to and extending axially of the cam, a pair of eccentric shafts coupled to each other, one of the eccentric shafts engaging the control rod and the other of the eccentric shafts having a slotted end, and a bladed member pivotally mounted adjacent the slotted end and engageable with the slotted end to hold the eccentric shafts against rotation and the control rod and the cam against axial movement.

7. A rotatable folder cylinder according to claim 6, further comprising a switch coupled to the bladed member and responsive to pivotal movement of the bladed member, the switch being adapted to interrupt operation of the folder cylinder when the bladed member has pivoted away from the slotted end of the other of the eccentric shafts beyond a predetermined position.

8. A rotatable folder cylinder according to claim 6, further comprising a latching member that is movable into engagement with a recess formed in the bladed member when the bladed member is seated in the slotted end of the other of the eccentric shafts to prevent pivotal movement of the bladed member away from the slotted end.

9. A rotatable folder cylinder according to claim 2,

further comprising a rotatable driven gear coupled to the cam to effect rotation thereof, a rotatable driving gear spaced from the driven gear, and rotatable intermediate gear means meshing with the driving and driven gears for transmitting rotational movement therebetween, the intermediate gear means including an intermediate gear mounted for limited and selected epicyclic movement to adjust operation of the pin members.

10. A rotatable folder cylinder according to claim 9,

wherein-the intermediate gear means further includes a lever pivotally mounted at one end concentrically with the driving gear and carrying said intermediate gear at its other end.

11. A rotatable folder cylinder according to claim 1, further comprising a rotatable folder blade, a gear train operatively coupled to the folder blade to effect rotation thereof, drive means for driving the gear train, the gear train and drive means being adapted for selective engagement with an disengagement from each other, and quadrant gear means including a quadrant gear adapted to mesh with a gear of the gear train when the gear train is disengaged from the drive means to prevent rotation of the gear train and the folder blade, the quadrant gear being rotatable to permit selection of a circumferential orientation thereof, and locking means for securing the quadrant gear in a selected circumferential orientation.

[2. In a rotatable folder cylinder including a plurality of pin members and axially movable cam means for effecting inward and outward movement of the pin members relative to the external circumference of the folder cylinder in each of the straight and collect modes of operation in accordance with the axial position of the cam means, the improvement comprising a control rod coupled to the cam means for axial movement therewith, a pair of eccentric shafts coupled to each other, one of the eccentric shafts engaging the control rod and the other of the eccentric shafts having a slotted end, and a bladed member pivotally mounted adjacent the slotted end and engageable with the slotted end to hold the eccentric shafts against rotation and the control rod and the cam means against axial movement.

13. The improvement of claim 12, further comprising a switch coupled to the bladed member and responsive to pivotal movement of the bladed member, the switch being adapted to interrupt operation of the folder cylinder when the bladed member has pivoted away from the slotted end of the other of the eccentric shafts beyond a predetermined position.

14. The improvement of claim 12, further comprising a latching member that is movable into engagement with 'a recess formed in the bladed member when the bladed member is seated in the slotted end of the other of the eccentric shafts to prevent pivotal movement of the bladed member away from the slotted end.

15. In a rotatable folder cylinder including a rotatable folder blade, a gear train operatively coupled to the folder blade to effect rotation thereof, and a drive means for driving the gear train, the drive means and gear train being adapted for selective engagement with and disengagement from each other, the improvement comprising quadrant gear means including a quadrant gear adapted to mesh .with a gear of the gear train when the gear train is disengaged from the drive means to prevent rotation of the gear train and the folder blade, the quadrant gear being rotatable to permit selection of a circumferential orientation thereof, and locking means for securing the quadrant gear in a selected circumferential orientation.

16. In a rotatable folder cylinder including a plurality of pin members, rotatable cam means for effecting inward and outward movement of the pin members relative to the external circumference of the folder cylinder, a gear train operatively coupled to the cam means to effect rotation thereof, and drive means for driving the gear train, the improvement comprising a gear of the gear train mounted for limited and selected epicyclic movement to adjust operation of the pin members.

17. The improvement of claim 16, wherein the drive means includes a rotatable driving gear and further comprising a lever pivotally mounted at one end concentrically with the driving gear and carrying said gear of the gear train at its other end.

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Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4190242 *Oct 20, 1977Feb 26, 1980Koenig & Bauer AktiengesellschaftGear folder
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Classifications
U.S. Classification493/431, 493/353, 493/444, 101/411
International ClassificationB65H45/16
Cooperative ClassificationB65H45/168, B65H45/161
European ClassificationB65H45/16D12, B65H45/16B
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