US2916286A - Letterpress hold-down wire - Google Patents

Description

Dec. bs, 1959 Filed May 8, 1958 B. J. KEATING 2,916,286

LETTERPRESS HOLD-DOWN WIRE 3 Sheets-Sheet l INVENTOR.

BILLY JArn/ Byiiw ff/MW@ Dec. 8, 1959 B. J. KEATING 2,916,286

LETTERPRESS HOLD-DOWN WIRE Filed May 8, 1958 3 Sheets-Sheet 2 INV ENT OR BILLY J iwf/Vg ATTORNEYS Dec. 8, 1959 B. J. KEATING 2,916,286

LETTERPRESS HOLD-DOWN WIRE Filed May 8. 1958 3 Sheets-Sheet 3 I BY ATTORNEYS United States Patent O LEITERPRESS HOLD-DOWN WIRE Billy J. Keating, Austin, Tex.

Application May 8, 1958, Serial No. 733,875

'3 Claims. (Cl. 271-89) The present invention relates to letterpress hold-down wires of the type used with presses of the two-color letterpress type.

The primary object of the invention is to provide a hold-down wire for letterpresses which can be adjusted to control the tension and modified to adapt its use to paper of varying thickness.

Another object of the invention is to provide a holddown wire of the class described above which will effectively prevent balling-up of printed material delivered from a press in the area of the drying llame, and hence prevent fires of such balled-up material.

A further object of the invention is to provide a holddown wire of the class described above which can be directly attached to existing press equipment without modifying the press structure in any appreciable degree.

A still further object of the invention is to provide a hold-down wire structure of the class described above which is inexpensive to manufacture, simple to attach, and which is completely effective in guiding the sheets on delivery from the printing press without offsetting the ink or causing smears.

Other objects and advantages will become apparent in the following specification when considered in the light of the attached drawings, in which:

Figure 1 is a fragmentary top plan view of the delivery end of a press with the invention attached thereto.

Figure 2 in-as enlarged fragmentary vertical crosssection taken along the line 2-2 of Figure l, looking in the direction of the arrows.

Figure 3 is a view similar to Figure 2, with the elements shown in a second position.

Figure 4 is a fragmentary end elevation of the end jogger plates.

Figure 5 is a view similar to Figure 4, illustrating the parts in adjusted position.

Figure 6 is an end elevation of a wire support.

Figure 7 is a side elevation of the structure illustrated in Figure 6.

Figure 8 is an enlarged side elevation of the hold-down wire and support structure.

Figure 9 is atop plan view of the structure illustrated in Figure 8.

Figure 10 is a side elevation of the structure illustrated in Figure 8, taken from the opposite side, illustrating a second position of the parts in dotted lines.

Figure 11 is an enlarged fragmentary end elevation taken along the line 11--11 of Figure l0, looking'in the direction of the arrows.

Figure 12 is an enlarged fragmentary transverse crosssection taken along the line 12--12 of Figure 8, looking in the direction of the arrows.

Referring now to the drawings in detail wherein like reference characters indicate like parts throughout the several figures, the reference numeral 2,0 indicates generally a letterpress of the type known as The Miller 2- Color manufactured by the Miller Printing Machinery Co. of Pittsburgh, Pennsylvania, and is of the type havj 2,916,286 Patented Dec. 8, 1959 'Ihe pulleys 25 are each supported on a pulley bracket 26 carried by a transversely extending pulley bracket shaft 27 fixed to the press 20. The pulley brackets 26 are laterally adjustable on the shaft 27 in a conventional manner. A transversely extending jogger operating shaft 28 is arranged parallel to and forwardly of the pulley bracket shaft 27 and normally carries a plurality of holddown wires (not shown).

A gas burner pipe 29 is arranged parallel to, slightly forwardly of and substantially below the jogger operating shaft 28 and has a plurality of burner jet apertures 30 formed in the upper face thereof to provide a drying llame for printed sheets moving thereover delivered from the tapes 22, 24.

Parallel and closely adjacent to the forward side of the burner 29 is an air pipe 31 having a plurality' of upwardly directed nozzles 32 formed therein to pro- Vide an upwardly directed current of air to assist in float ing heavier grade papers when moving from the tapes 22, 24 to the press jogger, generally indicated at 33.

The jogger 33 is provided to form a stack 34 of the printed sheets and includes a transversely extending pile bar support 35, a pair of spaced apart parallel longitudinally extending side jogger blades 36 extending forwardly from the pile bar support 35 and a transversely extending jogger blade shaft 37 which is arranged parallel to the pile barsupport. 35 and extends between the side jogger blades 36. A generally rectangular front center jogger blade 38 is supported on the jogger blade shaft 37 by means of a removable clamp 39.

A pair of front side jogger blades 40 are arranged on opposite sides of the center jogger blade 38 and supported on the jogger blade shaft 37 by detachable clamps 41.

The delivery tape section 21 of the press 20.is pivotally mounted on a shaft 42 to permit the servicing of inking mechanism located thereunder and the tape delivery section 21 is maintained in elevated position, as illustrated in Figure 3, by means of a latch structure (not shown) of conventional design. The press 20 is of such a nature that it must be stopped before elevating the delivery tape section 21 to the position illustrated in Figure 3.

The printing press 20 and the Amechanism described above is of conventional design and constitutes the structure to which my invention is attached.

The conventional hold-down wires used with the press- 20 are selectively engaged in one of the grooves 43 in the shaft 28. These hold-down wires are positioned in a groove 43 so as to align with spaces 44 occurring between printed areas 45, as seen in Figure 1.

In many instances, the spaces 44 in the printed material do not align with any one of the grooves 43, and the conventional hold-down wires tend to smudge or offset the ink on the printed material passing therebeneath. The present invention utilizing the adjustability of the brackets 26 on the shaft 27 is` arranged for lateral ed on the outer end of the bolt 50 and has an integral knurled knob 52 fixed to the outer end thereof. The function of the threaded sleeve 51 is described below.

The arm 47 is formed of relatively heavy sheet metal and includes a V-shaped bottom`wall 53 having the forward end thereof upwardly and rearwardly sloping at 54, as best seen in Figures 8 and 9. The arm 47 has a central longitudinally extending slot S opening through the apex of the V-shaped bottom wall 53, as can be seen in Figures 9 and 10.

The V-shaped bottom walls 53 are provided at their central portions with upwardly and inwardly converging panels 56. The panels 56 terminate in spaced relation to each other and have depending spaced apart parallel portions 57 integrally secured to the inner upper edges thereof. A transversely extending slot 58 is formed in the portions 57, panels 56 and V-shaped bottom wall 53, terminating in an enlarged transverse opening` 59, as best seen in Figures 8 and 10.

The arm 47, at the rear end portion thereof, is provided with outwardly extending horizontal portions 60 having integrally formed on the outer edges thereof spaced apart parallel upstanding rear end members 61, 62.

The rear end member 61 is provided with an inwardly projecting ear 63 formed on the lower portion of the rear end thereof. The ear 63 has a vertical slot 64 formed therein engaging over the bolt 50 and having a size such that the threaded sleeve 51 is too large to engage therethrough. The threaded sleeve 51 with the arm 47 raised to the dotted line position as illustrated in Figure 10, can be moved inwardly on the threaded bolt 50 so that the ear 63 will engage the threaded sleeve 51 and prevent the arm 47 from returning to horizontal position.

A pin 65 extends upwardly and forwardly from the shaft 49 and is rigidly secured thereto at the end thereof beyond the member 62. A stub shaft 66 is journalled in the member 62 forwardly and slightly below the shaft 49. A connecting pin 67 is slidably mounted in the stub shaft 66 for transverse sliding movement therethrough and has the end 68 thereof pivotally secured to the terminal end of the pin 65.

A coil spring 69 encompasses the connecting pin 67 and normally biases the end 68 of the connecting pin 67 in a direction away from the stub shaft 66. With the arm 47 in the position illustrated in Figure 8, the spring 69 normally urges the arm 47 downwardly at the forward end thereof. With the arm 47 in the position illustrated in Figure 3, the spring 69 is normally urging the arm 47 in an upward direction.

The hold-down Wire 46 has an integral T head 70 formed on the upper rear end thereof, and the head 70 is engaged through the slot 58 and is journalled in the enlarged opening 59 at the bottom thereof. As viewed in Figure 8, the T head 70 is attened in the plane of the wire 46 so that it can be moved through the slot 58 only when the wire 46 is depending perpendicularly from the arm 47. The wire 46 projects downwardly through the slot 55 and forwardly at an angle to the arm 47 with the forward end thereof engaging through a selected one of the bores 71 formed in the jogger plates 38 and 40.

The jogger blade shaft 37 is provided with V-shaped supports 72 having loops 73 encompassing the shaft 37. The support 72 is sprung outwardly so that the loops 73 bind against the shaft 37 to secure the support 72 in laterally adjusted position thereon.

The delivery tape section 21, when raised, tends to tip the arm 47 downwardly whereupon the pressure of the lwire 46 or contact with the pile bar support 35, causes the arm 47 to begin to turn in a clockwise direction around the shaft 49 on which it is journalled. The pins 65 and 67 pass dead center so that the spring 69 moves the arm 47 to the position illustrated in Figure 3. ln this position, the wire 46 and the head 70 thereon can be moved out of the slot 58 so that it may be removed and replaced as desired.

When the delivery tape section 21 is lowered, the arm 47 will strike the shaft 28 and be restrained from further rearward movement thereby so that as the pins 65 and 67 pass dead center again, the spring 69 will become effective to move the arm 47 to the position illustrated in Figure 2.

The press 20 is usable through a variety of sizes of material'and the jogger plates 38, 40 can be overlapped to a more or less extent, and in sorne cases', .the center blade 38 can be used alone with the side wires 46 having their forward ends carried in the supports 72. While the hold-down wires 46 are normally used with the arm 47, particularly in the case of relatively thin material, it should be understood that the arms 47 may be used alone in the case of relatively thiclcmaterial and when conditions require.

In printing, the paper is normally either curled up or down and a serious bottleneck develops at the forward end of the delivery tape section 21 when the forward edge of the paper comes in line with the gas burner 29. The paper tends to curl back on itself under such condition and ball-up over the gas burner 29 so as to become easily ignited and create a dangerous fire.

Having thus described the preferred embodiment of the invention, it should be understood ,that numerous structural modifications and adaptations may be resorted to without departing from the scope` of the vappended claims.

What is claimed is:

1. A hold-down wire support for printing presses of the type including a transverse jogger blade shaft at the delivery end thereof and having a transversely adjustable tape pulley bracket mounted on said printing press adjacent the delivery end thereof but spaced from said jogger blade shaft: comprising an arm4 having a V-shaped cross-section, means pivotally securing said arm to said bracket on a horizontal axis, a hold-down wire, a T head formed on one end of said hold-down wire, means on said arm loosely pivotally securing said T head thereon, and means adapted to be laterally adjustably supported on said jogger blade shaft for supporting the end of said hold-down wire opposite said T head.

2. A device as claimed in claim l wherein over-center means are provided on said arm for selectively biasing said arm in a downward direction in one position of said arm and in an upward direction in another position of said arm.

3. A device as claimed in claim l wherein said V- shaped arm is provided with an elongated longitudinally extending central slot through which said hold-down wire Hall May 19, 1896 McGarvin Sept. 22, 1925

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