US2892390A

US2892390A - Combination printing and die scoring and cutting presses for paper box blanks and the like

Info

Publication number: US2892390A
Application number: US555609A
Authority: US
Inventors: Harold R Wittrock
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-12-27
Filing date: 1955-12-27
Publication date: 1959-06-30
Anticipated expiration: 1976-06-30

Description

June 30,-1959 H. R. WITTROCK 2,892,390

COMBINATION PRINTING AND DIE SCORING AND CUTTING PRESSES FOR PAPER BOX BLANKS AND THE LIKE Filed Dec. 27, 1955 v 3 Sheets-Sheet 1 INVENTOR. HAROLD R. W/TTROCK BY Atzfgs.

June 30, 1959. H. R: WITTROCK COMBINATION FRI NTING AND DIE SCORING AND CUTTI PRESSES FOR PAPER BOX BLANKS AND THE LIKE Filed Dec. 27, 1955 3 Sheets-Sheet 2 INVENTOR.

. s WW m A u tw R w m Y B we June 30, 1959 WITTROCK 2,892,390

COMBINATION PRINTING AND DIE SCORING AND CUTTING PRESSES FOR PAPER BOX BLANKS AND THE LIKE 3 Sheets-Sheet 3 Filed Dec. 27, 1955 1 u- IIv/ENTOR. & HAROLD R. WlrmocK Atys,

United States Patent Ofifice COMBINATION PRINTING AND DIE SCORING AND CUTTING PRESS'ES FOR PAPER BOX BLANKS AND THE LIKE Harold R. Wittrock, Cincinnati, Ohio Application December 27, 1955, Serial No. 555,609 1 Claim. (Cl. 93-58) This invention relates to an improvement whereby cylinder printing presses may be converted to a combined printing and die scoring and cutting press for making printed paper board blanks for objects such as folding boxes, cartons and the like.

Heretofore the die cutting and scoring of paper board blanks for folding boxes and the like have been done on one press and the printing an another; whereby two separate and distinct operations were performed which were time consuming and expensive.

An object of this invention is to provide a press whereby the two distinct and separate operations of prior devices, namely, printing and die scoring and cutting are performed at one and the same time with the resulting reduction in handling of the raw blanks and the finished cartons.

Another object of this invention is to provide a single cylinder press with means whereby paper blanks for boxes and the like may be simultaneously scored and cut with the die and printed in one operation.

A further object of the invention is to provide a means whereby a standard cylinder printing press may be converted to a press for scoring and die cutting of paper box or carton blanks and simultaneously printing the same in one operation.

The foregoing and other objects of the invention will be apparent to those of ordinary skill in the art to which the invention pertains from the following description and the drawings.

In the drawings:

Figure 1 is a view in side elevation and partly in longitudinal section of a cylinder press provided with means whereby the die scoring and cutting of paper box or container blanks and the printing thereof may be done in one operation, the same being an illustration of an embodiment of the invention;

Fig. 2 is an end view of the machine, partly in transverse section;

Fig. 3 is a partial view in side elevation as seen looking in the direction of arrows III-III of Fig. 2;

Fig. 4 is a view partly in transverse section showing a modified form of a feature of the invention;

Fig. 5 is a view in section on line V-V of Fig. 4;

Fig. 6 is an end view of Fig. 4 as seen looking in the direction of arrows VI-VI;

Fig. 7 is a view in perspective of a die and a printing plate embodied in the machine; and

Fig. 8 is a plan view of a paper board blank for a folding box or carton which has been die scored and cut and printed in one operation on the machines illustrated.

In Figs. 1 and 2 of the drawing a combination cylinder printing and die cutting and scoring press 1 for paper board folding box and container blanks is shown. The press comprises a frame 2 having thereon a bed 3 adapted to be reciprocated back and forth on the frame. The bed is reciprocated by means not shown but which is well known in the art. An oscillating gear 4 mounted on a shaft 5 supported in bearings on the frame 2, is driven by 2,892,390 Patented June 30, 1959 the bed through a rack 6 secured thereto and a pinion 7 on the shaft 5. On the bed 3 is a plate 8, the forward portion 9 of which may be elevated relative to the rear portion 10.

The end of the elevated portion is disposed to engage an inking roller 12 when in the position shown in Fig. l. The inking roller 12 may be oscillated by any suitable mechanism such as cam 13 and crank arms 14 (only one of which is shown) at the ends of the roller. The oscillation of roller 12 is so timed that it dips into engagement with a roller 15 when the bed has moved out from under roller 12, and rises to the level shown when the bed is in position under the same. Roller 15 is part of an inking device 16.

The inking device 16 includes a yieldable inclined wall 17, a stop 18 and an adjustment 19 for adjusting the pressure of plate 17 against the roller 15. The adjustment of this pressure regulates the amount of ink which roller 15 picks up from a supply of ink 20. The inking device 16 may be of a well known construction as shown.

Extending across plate 8 adjacent the inking end thereof are pairs of rollers 21-22 and 23-24. The rollers in one pair diverge with respect to the rollers in the other pair so that the rollers in each pair are disposed at an angle transversely of the plate 8. They make contact with the plate 8 when it is under them as shown in Fig. 1 and effect even distribution of the ink on the plate.

The rear or depressed portion 10 of plate 8 is provided with a combination scoring or creasing and cutting die 25 and a printing plate 26, such as shown in Fig. 7, and is designed to produce a printed folding box blank 27 shown in knocked-down condition in Fig. 8.

The printing plate 26 is inked by an inking pad 29 mounted on a roller 30 that extends crosswise of the press bed. Roller or cylinder 30 is supported in bearings 31 that are mounted in adjustable brackets 32. The brackets 32 are supported by hinge bolts 33 in longitudinal frame members 34 carried by the frame of the machine. The brackets 32 may be provided with adjustment screws 35 by means of which the brackets may be rotated to adjust the vertical position of the cylinder 30. The screws 35 are provided with adjustment and locking nuts 36 whereby the adjustment just mentioned may be effected and secured.

The cyinder 30 is provided with a gear 38 that meshes with gear 4 on shaft 5 and is driven and oscillated thereby. Therefore, by properly positioning the inking pad 29 on the cylinder 30, it will be in position to engage and ink the printing plate 26 as it passes to and fro under the cylinder. The circumference and linear speed of rotation of cylinder 30 are such that inking pad 29 is inked by portion 9 of plate 8 when it moves rearwardly in the printing and cutting and creasing operation of the press.

The machine also includes a main cylinder or roller 40 of conventional type that is driven in one direction only as indicated by the arrow 41 in timed relation with the reciprocating motion of the press bed and the oscillating motion of roller 30. Roller 40 being of conventional form is provided with means not shown for gripping a blank sheet of paper board stock 42 that is fed from a stack of sheets 43 by the pressman. Roller 40 picks up the sheet fed to it and carries it around with the same into engagement with the scoring and cutting die 25 and the printing plate 26 when the press bed moves to the right from the Fig. 1 position to the position where the paper board stock is caused to make contact with the die elements and the printing pad.

The sheet after having been worked upon by the die and the printing pad, is carried over the top of roller 40 where it is gripped by a device 45 and transferred to a board 46 on which the finished blanks are deposited on a stack 47. Thus the blanks of paper board are scored or creased and cut by the die 25 and printed by the plate 26 in one operation as the cylinder revolves and the bed moves to the end of its rearward or work stroke. The cylinder carries the printed sheet with it until it reaches the top of the same at which point it is released to the transfer device and discharged upon the stacking table.

The combination die and printing device as shown in Fig. 7 includes a bed 45 having secured thereto by known wedges and keys, transverse die creasing members 47 to 50, inclusive, longitudinal creasing or scoring members 51 to 55, inclusive, cutting elements 56 to 61, inelusive, and slitting

members

62 and 63. The transverse creasing members form the score or crease lines 64 through 67, both inclusive of Fig. 8; the longitudinal creasing members form the scores or

crease lines

68 and 69; the cutting members 56-61 form the cut-out portions indicated by the cross-hatched areas 70 to 75, both inclusive, and the slitting

members

62 and 63 form the

slits

76 and 77.

The inking pad 29 may be made of a yieldable material such as natural or synthetic rubber or similar material. Similarly, the printing plate 26 may be made of a similar yielding material. The members which crease and score may also be mounted yieldingly on the bed 45 to avoid excessive pressure between the cylinder 40 and the die elements.

In practice the printing plate 26 is set below the upper edges of the transverse and longitudinal scoring members of the die, a distance equal to the thickness of the paper board blank.

In Figs. 4, and 6 there is illustrated a modified form of inking pad roller 30'. That roller is provided with a shaft mounted in bearings 80 secured to channel members 81 on opposite sides of the machine frame. The upper flanges of these channels may be slotted longitudinally to accommodate clamping or securing bolts 82. Thus, the inking roller 30' may be adjusted lengthwise towards or away from the cylinder 40.

The cylinder 30 is provided with a gear 83 at one end, the pitch diameter of which is the same or slightly less than that of cylinder 30 plus the thickness of pad 29 and it meshes with a rack 84 secured to the bed 3 of the machine. To facilitate more uniform spreading of ink on the inking pad or pads on cylinder 30',

rollers

85 and 86 are provided. The arrangement of Figs. 4 to 6 makes it possible to have larger inking pads and printing plates on the die bed 45. Furthermore, the extent of adjustment of roller 30 lengthwise of the bed of the machine is increased without disturbing the intermeshing relationships between the gear 83 and the rack 84. It will be appreciated that in the case of the drive for the roller or cylinder 30 of Figs. 1, 2 and 3 the amount of adjustment vertically is limited by the amount that the form of the gear teeth will allow.

Having thus described the invention, it will be apparent to those of ordinary skill in the artto which the invention pertains that various modifications and changes may be made in the illustrated embodiments without departing from either the spirit or the scope of the invention.

Therefore, what is claimed as new and desired to be secured by Letters Patent is:

A cylinder press comprising a frame having a main roller thereon and a bed disposed for reciprocating motion under said main roller, said bed having a forward inking plate portion and a rear die bed portion with said die portion lying in a plane below the upper surface of the inking plate portion, a die on said bed having its upper edge lying in the plane of the surface of the inking plate portion for cooperation with said main roller for cutting and scoring paper board, a printing plate mounted on the die bed portion within said die and below the upper edge of said die portion for printing on cardboards simultaneously with the cutting and scoring thereof, a cylinder in front of the main roller and having thereon an ink pad disposed to be operated in timed relation with said die bed for applying ink to said printing plate as it moves to and fro with die bed, the inking pad being of sufiicient size to register with the printing plate and of insufiicient size to engage the die, an inking roller movable into engagement with the inking plate portion as said plate portion moves back and forth under the cylinder and means for moving said bed back and forth beneath said main roller and cylinder.

References Cited in the file of this patent UNITED STATES PATENTS 697,487 Jackson et a1. Apr. 15, 1902 1,463,839 Raabe et a1. Aug. 7, 1923 FOREIGN PATENTS 11,442 Great Britain H. Aug. 8, 1888