US 2821915 A
Description (OCR text may contain errors)
N. KATZ Feb. 4, 1958 MEANS FOR INTERMITTENTLY PERFORATING AND SKIPPING 2 Sheets-Sheet 1 Filed May 3, 1954 O I C \L 1 A .i.Ill:IIIIII IIII m H II A 1 :11- O C 5 8 L 1 II A 0 4. PI/Il! mu.
R m m m N. KATZ Feb. 4, 1958 MEANS FOR INTERMITTENTLY PERFORATING AND SKIPPING A PREDETERMINED NUMBER OF SHEETS 2 Sheets-Sheet 2 Filed May 3, 1954 INVENTOR. NATHAN 047-2.
United States Patent MEANS FOR INTERMITTENTLY PERFORATING AND SKIPPING A PREDETERMINED NUMBER OF SHEETS Nathan Katz, New York, N. Y.
Application May 3, 1954, Serial No. 427,057
2 Claims. (Cl. 101-226) This invention relates to mechanism for slitting, scoring or perforating, and more particularly is directed to providing an attachment for sheet fed printing presses for slitting, scoring or perforating selected ones of the sheets being fed through the press. This application is a continuation-in-part of my prior application Serial No. 164,801, filed May 27, 1950, now abandoned.
In books of receipts, tickets or the like, it is common practice to provide several numbered receipts or tickets on each sheet and to provide several, preferably three, superposed sheets which may be vari-colored bearing identical numbers so that carbon paper may be interposed between the mating sheets for producing copies of the top sheet upon which the clerk inscribes the necessary information. The top receipt may then be detached and given to the customer, the next receipt attached to an article, for example to a garment if the book is used by a cleaning establishment, and the lowermost receipt retained in the book as a permanent record of the transaction. To provide for the easy detachment of'the uppermost and second receipts, the boundaries or margins of such receipts are preferably perforated, while it is desirable that the lowermost sheet be imperforate for security in retaining the copies of the receipts thereon as a permanent record. In printing the sheets described above, a press having a suitable numbering device is utilized to print the identical numerals on the desired number of successive sheets fed through the press. The perforating mechanisms heretofore proposed are inadequate for the purpose of perforating selected ones of the sheets fed through the press and bearing mating numbers and leaving other sheets bearing such numbers imperforate.
A primary object of this invention is to provide an attachment for printing presses of the sheet fed type which automatically and selectively perforates, slits or scores certain of the sheets fed through the press, preferably the first two sheets and leaving the third sheet without such perforation.
Another object of this invention is to provide an attachment of the character described in which the perforating, slitting or scoring element thereof is rendered inactive during selected intervals, preferably every third revolution of the press and which intervals are coordinated directly with the operation of the printing press. A further object of this invention is to provide an attachment of the character describe-d which is simple in construction, relatively inexpensive, positive and foolproof in its operation, and easily adapted for attachment to a variety of printing presses.
These and other objects, features and advantages will appear in the following detailed description and in the accompanying drawings illustrating a specific embodiment of the invention.
In the drawing, wherein like reference characters indicate similar parts:
Fig. 1 is a plan view of three sheets of paper illus- 2,821,915 t em d Feb. 4, 1958 ICC trating the effect of the attachment in perforating only two of three sheets fed through the printing press.
Fig. 2 is a fragmentary perspective corner view of a book formed of the three sheets with carbon paper in between;
Fig. 3 is a side elevation of an attachment constructed according to this invention and installed upon a printing press, of which a portion is illustrated;
Fig. -4-is a fragmentary top plan view of the attachment illustrated in Fig. 3;
Fig. 5 is a side elevational view of the attachment similar to Fig. 3 and showing the perforating or scoring element in operative position as distinguished from the inoperative position illustrated in Fig. 3;
Fig. 6 is an enlarged perspective view of an element of the illustrative embodiment of this invention; and
Fig. 7 and Fig. 8 are enlarged detailed side elevations of the perforating or securing element showing such element in inoperative and operative position, respec tively.
Referring to the drawings in detail, and initially to Figs. '1 and 2 thereof, a composite of a receipt book or the like is illustrated. The same consists of a top sheet 12, a middle sheet 14 and a bottom sheet 16, which may be formed of paper or similar material of varied colors;
The top and middle sheets 12 and 14, respectively, are
divided into a plurality of rectangular areas by the perforated line 18. As noted in Fig. 1, the bottom sheet 16 is not scored. Each of the sheets making up a page is further printed with the identical identifying symbol or indicia to provide individual receipts. In the use of a page of receipts of the character described, carbon paper C may be interposed between the sheets 12 and 14 and between the sheets 14 and 16 so that any writing" upon the top sheet 12 will be reproduced on the underlying sheets. The portion of the top sheet 12 may then be separated along the score line 18 and presented to the customer as a receipt, the portion of the middle sheet 14 may be similarly detached and secured to an article for the purpose of identifying it, and the nonperforated bottom sheet retained as a permanent record of the transaction. A margin 13 may be provided on the left hand side for binding purposes. In printing the indicia upon the three sheets, sheets are fed through a printing press of suitable type equipped with number ing devices of well known construction which change the numerals printed on the sheets after three sheetshave been printed. In order to perforate only two out of each group of three sheets bearing the same indicia a perforating attachment soon to be described is mounted directly upon the printing press and perforates the sheets as the latter undergo the printing operation with the perforations in the other direction, if more than one ticket appears on a sheet, being formed either before or after .the printing opeation by a similar or any other suitable perforating device.
- Figs. 3-8 illustrate a perforating attachment accord formed with stub shafts 26 at its opposite ends which are rotatably journalled in the side frames. The impression cylinder 24 has a resilient surface, for example, rubber, and is rotated by mechanism (not shown.)
The perforating attachment, generally indicated by the numeral 2%, includes a supporting shaft 30 extending parallel to the axis of rotation of cylinder 24 and rockably journalled at its opposite ends in the bushings 32 carried by side frames 22. A plurality of suitable perforating devices 34 are mounted upon the shaft 30 in spaced apart relation. The perforating devices 34 are of known construction, and each of such devices includes a housing 36 having a split-clamp portion clamped non-rotatably on the shaft 30 by the pressure screw 38 and a perforating wheel 40 rotatably carried by the free end of the housing. By loosening the pressure screws 38, the respective perforating devices may be adjusted manually axially and angularly relative to the shaft 30.
A crank-arm 42, seen in detail in Figure 6, includes a top portion 43 having a bore 44 formed intermediately therethrough said receiving an end of the shaft 30. A set screw (as shown) extends into the bore 44 and non-rotatably clamps the crank-arm relative to the shaft. A spring 45 is secured at one end to the side frame 22 and at the other end to an end of the top portion 43 of the crank-arm. The spring 45 constantly urges the shaft 30 to rock in the direction for moving the perforating wheels 40 against the surface of the cylinder 24. A right angled member 46 extends from the end of the top portion remote from the spring connection, and terminates in a laterally disposed U-shaped portion 47 extending from its lower end. The free end of the U-shaped portion 47 is bifurcated, as at 48, and a cam follower roller 49 is journalled in that bifurcated end.
A pinion gear 50 is non-rotatably fixed upon the stub shaft 26 and meshes with the relatively large spur gear 52 which is rotatably supported by the boss 54 mounted upon the side frame 22. A cam member 56 is mounted upon the spur gear by the fastening devices 57 and is spaced laterally from the gear by the spacers 58. The cam follower 49 engages the peripheral edge of the cam member 56 and the parts are so proportioned that such engagement rocks the arm 42 and shaft 30 for moving the perforating wheels 40 away from the cylinder surface to an inoperative position illustrated in Figures 3 and 8. When the gear 52 is further rotated and moves the cam member 56 beyond the cam follower 49, the arm 42 is free to rock under the influence of the spring 45 to force the perforating wheels against a sheet on the cylinder, as shown in Figs. and 7. In Fig. 4 it can be seen that the spur gear 52 is received within the U-shaped portion 47 of the crank-arm 42 and therefore does not interfere with the swinging of the latter when it is released from the cam surface.
Since in printing presses of the sheet fed type the impression roller or cylinder makes two revolutions for each sheet that is printed, one revolution for taking up the sheet and the second revolution for printing the perforating wheels must be retained in the inoperative position for two revolutions after every two sheets have moved through to provide for the imperforate third sheet. In the specific embodiment illustrated, the gear ratio of gears 50 and 52 is 1:6; that is, gear 50 makes six revolutions for each complete revolution of gear 52. The marginal edge or periphery of the cam member 56 has a length equal to one third the circumference of the generating circle. Therefore, the roller 49 will be engaged by the cam member for one third of a revolution of the gear 52 or for two revolutions of the gear 50 out of every six revolutions of the latter. Of course, the gear ratio and the length of-the cam member may be varied to provide for the moving of the perforating wheels to inoperative position coincident'with the feeding of every second sheet, every fourth sheet or at any other selected interval.
Since the surface of the impression roller 24 is resilient, metallic bands 60 are disposed upon the cylinder and slidable axially thereon for registration with the respective perforating wheels 40 to provide a suitably rigid surface against which the perforating wheels may act and to prevent damage to the cylinder surface by such wheels. As seen in Figure 6, the sheet 62 is disposed about the cylinder 24, and the perforating wheel when operative cuts perforations into the sheet.
While sets of three pages having only three tickets on each page are shown, it is understood that more than three tickets may be provided for on each page. Thus, there may be horizontal rows of 4 or more tickets, or rows may be placed horizontally underneath each other. In such case horizontal perforations are provided on the first two sheets.
Having thus described a specific illustrative embodiment of the invention, it is apparent that various changes and modifications obvious to one skilled in the related art may be effected without departing from the scope of the invention as defined by the appended claims.
What I claim is:
1. In a printing press which includes a pair of side frames, a rotatable impression cylinder journalled at its opposite ends in the side frames, and a perforating attachment having a plurality of spaced perforating elements each of which elements includes a housing non rotatably mounted on a shaft and extending radially from the latter and a perforating wheel rotatable on the free end of said housing; the combination of means for rockably mounting said shaft at its opposite ends in the side frames for movement about an axis parallel to that of the cylinder, a crank arm fixed on one end of said shaft, spring means connected to said crank arm for yieldably urging said perforating wheels against the surface of the cylinder for perforating a sheet on the latter, a small gear adapted for mounting on one end of the impression cylinder, a relatively large gear mounted for rotation about an axis parallel to and spaced from the axis of the cylinder and meshing with said small gear, the gear ration between said large and small gears being amultiple of two, a segmental radial cam member fixed on said large gear and having a periphery formed as the arc of a circle equal in length to the inverse of said multiple times the circumference of the generating circle, and a cam follower carried by said crank arm and em gageable with the periphery of said cam member for rocking. said shaft to move said perforating wheels inthe direction away from the surface of the cylinder.
2. A perforating attachment as set forth in claim 1; wherein said gear ratio is one to six and the length of the periphery of said cam member is one-third of the circumference of the generating circle so that said pe'rforating wheels are successively spaced from the surface of the cylinder for two revolutions of the latter. and then urged against the cylinder by said spring, means for the subsequent four revolutions of the cylinder.
References Cited in the file of this patent UNITED STATES PATENTS 366,104 Holm July 5, 1887 771,504 Spoerl Oct. 4, 1904 1,541,201 Wennerblad et a1. June 9, 1925 2,434,624 Peterson Ian. 13, 1948