Патент USA US2114948код для вставки
April 19, 1938'. K..WEHNER.ET AL ‘ 2,114,948 CREASING RULE ' Filed May 21, 1937 I I. v 7P2] .77 .Fea 2,114,948 Patented Apr. 19, 1938 ATET OFFIE. 2,114,948 ' CREASING RULE Kari Wehner and Ralph Reay, Portland, Oreg. Application my 21, 1937, Serial No. 144,107 4 Claims. This invention relates to creasing rules em— ployed in creasing cardboard stock in the manu facture of boxes and cartons, being generally associated with cutting rules, the creasing and 5 cutting rules being set up‘ as a. die in the chase of a press so that the entire box or carton blank is stamped out at one operation with the neces sary cuts and creased lines of fold. ‘ ’ The cutting rules are ?at steel pieces of any desired length, with one longitudinal edge sharp~ ened to form a knife edge. The creasing rules are of exactly the same height as the cutting rules, but are ?at on the edge corresponding to the knife edge of the cutting rule, and of different thickness depending upon the thickness of the stock to be creased, since the same gauge of creas ing rule will not make a proper crease in all thick messes of stock. The conventional cutting rule is invariably of 2 point thickness (a point .01383'7 of an inch), 20 while the creasing rules usually are made of two point, 4 point and 6 point thickness, the thickness being uniform throughout the body of the rule. It may be readily understood that a cutting rule r and a 2 point creasing rule placed end to end can be clamped tight in a chase between paral lel blocks of uniform thickness, but that a cut ting rule and either a 4 point or 6 point creas ing rule so placed, cannot be clamped between 9 blocks of uniform thickness, but it is necessary ‘’ in order to have the cutting rule line with the creasing rule to use either a 4 or 2 point lead as the case may require, ‘or cardboard strips along side the cutting rule to build it up to the thickness of the creasing rule, or to cut the blocks of smaller thickness where they must clamp against the creasing rule. (01. 93-58) In the drawing which accompanies and forms a part of the following speci?cation, and through out the several ?gures of which the same char acters of reference have been employed to desig nate identical parts: Figure l is a bottom plan view of a chase with a die set up and clamped therein including cut ting and creasing rules embodying the features of the present invention; Figure 2 is a section taken along the line 2—2 10 of Figure 1; Figure 3 is a section taken along the line 3—3 of Figure 1; Figures 4 and 5 are sections through creasing rules of different thickness illustrating their 15 creasing operation upon different gauge stock; Figure 6 is a perspective View through a por tion of creasing rule constructed according to the principles of the invention; and Figure 7 is a perspective View showing a cutting rule in end to end relation with a creasing rule, illustrating uniformity in the thickness of those portions of the rules which are to be clamped in longitudinal alignment. Referring now in detail to the several ?gures, the numeral i represents in general a chase comprising the rectangular metallic frame 2 hav ing clamps 3 at one end and one side thereof, the usual furniture consisting of Wooden blocks A and 5, all of the same width and thickness, but cut to suitable lengths to correspond to the lengths of rule with which they are to be set up. The numerals 6 and ‘I represent lengths of creasing rule, which are set up in respective end wise relation to shorter pieces of cutting rule 8 and 9. The arrangement of cutting and creas ing rules as shown is adapted to out and crease a blank for the bottom or top of a rectangular box This causes considerable loss of time and lacks accuracy and even accurately done, it may cause having four sides de?ned by creased lines of 40 the die to spring when locked in the chase. Many times the dies will bulge and break while being used in the process of cutting. In nearly all such cases, this means not only losing the die, but also a broken cutting press which brings production as a and b1, these like the other blocks, are of to a standstill. The present invention has for its object the provision of a creasing rule having the base por tion, that is, the portion which clamps between the blocks of the die of the same thickness as the cutting rule and the face portion of different de sired t 'ilCkZlESS as, for example, 2 point, 4 point, 6 point, etc. Other objects of the invention will appear as the following description of a preferred and prac 55 tical embodiment thereof proceeds. fold and with the corner portions cut away. Referring to certain speci?c blocks designated uniform width and thickness. Therefore if the cutting rule 8 were of 2 point thickness and the creasing rule 6 of 4 point thickness throughout, 45 it would be impossible to clamp both rules up tightly between the blocks a and b for when the blocks b‘ were in tight engagement with the 4 point creasing rule 6, the 2 point cutting rule 8 would be loose in the space between the blocks a. 50 This is the condition which attends the use of cutting and creasing rules of the type at present employed. In order to make the cutting rule tight it is necessary to ?ank it on both sides with pieces 55 2 2,114,948 of cardboard of suitable thickness or with pieces of lead. As has been stated in connection with the objects of the invention it is quite unusual that the buliding up of the thickness of the cut ting rule to that of the creasing rule can be done with accuracy, the result being that when the die is clamped up in the chase, the unequal pressure in various parts of the die will cause the die to bulge and break out from the chase in the act of pressing which means not only losing the die, but breaking the rule and the press. Figure 1 however does not disclose the supposed case where cutting and creasing rules with bases of different thickness are used, but it illustrates the present invention in which the bases of the creasing rules are all of 2 point thickness, the same as that of the cutting rule regardless of whether the faces of the creasing rules are of 2 point, 6 point, or any other point thickness. Figures 2 and 3 are comparative, showing that the base portion 10 of the creasing rule is of the same thickness as the cutting rule 9, but that the face H of the creasing rule is of the desired thickness, for example, 4 point, as shown. It is quite evident that since the bases of both the cut ting and creasing rules are of the same thickness it is an easy matter to clamp them up in the chase between the blocks of the die without having to build up the thickness of the base of the cut ting rule and without the necessity of cutting thinner those blocks between which the creasing rules are clamped. It will be observed from the several ?gures and particularly Figures 2 and 3 that the blocks 4 and 5 are of the same thickness and it is preferred to make the base portion of the creasing rule of a width equal substantially to the thickness of the blocks so that when the creasing rule is clamped between the blocks the thin portion of the creasing rule will be fully supported by the blocks substantially throughout its entire height. The employment of creasing rules of different width is made necessary through the fact that a single width of creasing rule is not practical for creasing all widths of cardboard. Figures 4 and 5 illustrate the action of creasing rules [2 and I3, being respectively of 2 point and 4 point thickness increasing pieces of stock l4 and [5 respectively of different thickness. It will be apparent that creasing rules embody ing the principles of our invention may be used in end to end or in any other relation with 2 point cutting rules and that they are freely inter changeable, without the necessity of employing any expedient for building up the thickness of the thinner rule so as to enable it to be clamped uniformly with respect to the thicker rule. While we have in the above invention disclosed what we believe to be a preferred and practical embodiment of the same, it will be understood to those skilled in the art that the details of construction as illustrated and described are 10 merely by way of example and not to be con strued as limiting the scope of the invention as de?ned in the appended claims. What we claim is: 1. In a box blank cutting and creasing die, in combination with means having parallel equi spaced clamping faces, a cutting rule and a creasing rule having base portions both of the same thickness adapted to be clamped between said faces, said creasing rule having a portion 20 including the working face thicker than said base portion. 2. creasing rule adapted to be clamped in end to end relation with a cutting rule of standard thickness, between the parallel equi-spaced faces of clamping members in a chase, the creasing rule having the base portion which is engageable by said clamping means, of the same thickness as the cutting rule, and having a portion including the working face, of greater thickness than the 30 base portion. 3. Creasing rule comprising a metal piece hav ing a base portion of uniform thickness through out adapted to be clamped between blocks in a chase, and a portion including the working face adapted to project from said blocks said last named portion being thicker than said base por tion. 4. In combination a creasing rule and cutting rule adapted to be arranged end to end between equi-spaced clamping members, and of such height as to project above said members, por tions of said creasing and cutting rules which are adapted to be engaged by said clamping mem bers being of equal and uniform thickness throughout, the projecting portion of said creas ing rule being of greater thickness than the por tion which is adapted to be clamped between said clamping members. KARL WEHNER. RALPH REAY.