US2050785A - Means for perforating paper sheets and the like simultaneously with the printing thereof - Google Patents

Description

J. DE RIDDER ET AL MEANSIOR PERFORATING PAPER SHEETS AND THE LIKE SIMULTANEOUSLY WITH THE PRINTING THEREOF Filed OG'L. 21, 1955 Aug. 11, 1936.

Patented Aug. 11, 1936 Jacobus de Ridder and Willem Gerhard Brill, Johannesburg, Transvaal, Union of South VAitrica Application October 21, 1935, Serial No. 46,018 1n Union of South Africa August 8, 1935 13 Claims.

This invention relates to means for perforating paper sheets and the like simultaneously with the printing thereof.

At present, when it is desired to make a book 5 consisting of alternate perforated and unperforated sheets, it is necessary rst to print the unperforated sheets, then insert in the bed of the printing machine a so-called perforating rule, and thereafter run off a like number of sheets which will each be perforated and printed at one operation. Finally, the two sets or" sheets are interleaved in alternate formation, so that, when the book is bound, a perforated or tear-oil sheet will intervene between each two adjacent unperforated or fixed sheets. This procedure is both laborious and liable to produce errors.

The object of the present invention is to overcome these drawbacks, and render cheaper and more expeditious the manufacture of books consisting of alternately or otherwise arranged, perforated and unperforated sheets;

According to the invention, the means for peri forating the sheets or the like comprises the combination with one or more perforating rules or members, of mechanism whereby such rule or member is moved into and out of operative position automatically in accordance with the operation of the printing machine.

More specifically, the` printing machine has movably mounted, on its type-bed, one or more perforating rules or members and a change-over mechanism which, at each impression of a sheet against the type-bed, is actuated by the platen of the machine or an element movable therewith,

sov as to turn or slide the rule or member into a position Where it will perforate, or leave unperorated, as the `case may be, the sheet or the like.

Preferably, means is provided whereby the perlforating rule or member is positively held by a spring detent or like device when moved into its .respective operative and inoperative positions. lIhe change-over mechanism may be arranged so Vto alter the position of the rule or member that every alternate sheet is perforated, or that only every'third sheet, or the sheets in any other sequence (e. g., pairs of sheets separated by a single sheet) may be perforated. In addition, locking means may be provided whereby, for the purpose of perforating all the sheets, the rule or member may be `positively fastened or held in its operative position.

A preferred form of perforating means embodying the invention will now be described, by

way of example, with reference to the annexed drawing, in whichz- Fig. 1 is a side elevation of the means with the perforating rule in inoperative position and With the front wall broken away for clearness.

Fig. 2 is a similar elevation with the rule in operative position.

Fig. 3 is a front view corresponding to Fig. 2.

Fig. 4 is an end sectional view of the means taken on the line IV-IV (Fig. 1).

Fig. 5 is a detail View of a spring detent for holding the means against accidental movement. 10

Fig. 6 is a detail View of locking means for the rule.

Fig. 'l is an enlarged detail view of a cam for operating the rule pusher lever (partly broken away).

Fig. 8 is a side elevation of a modied form of perforating means with the rule in inoperative position and the front wall broken away.

Fig. 9 is a Sectional view of the modied means taken on the line IX-IX (Fig. 8).

Referring to the drawing:-

The perforating rule I is mounted on a spindle 2 at its lower edge within a frame 3 attachable to the type bed Y(not shown). By means Vof a torque spring 5, the rule I is constrained to els-,25 sume an inclined position (see Figs. l and 4) eX- cept when held upright by a pusher lever 6, a roller l on the end of which bears against a tapered plate 8 on the rule. In its inclined position, the rule has its perforating teeth 9 located 30 below the level of the type (not shown) while, in its upright position, the teeth 9 project above such level in order to perforate the impressed sheet (not shown).

For the purpose of operating the lever 6, a 35 change over mechanism is provided including a plunger I0, acted on by a compressed spring II and carrying a pawl I2 acted on by a spring I3 is mounted within the frame 3. rIhe platen (not shown), when it carries the sheet against the 40 type, simultaneously depresses the plunger I0 and, when the platen recedes and allows the plunger I0 to rise, the pawl I2 turns a ratchet wheel I4 through one tooth-pitch. A pin gear wheel I5 is rotatable with the ratchet wheel I4, and the 45 lever 6 is so mounted on a pivot I that its adjacent end I 'I projects into the path of the gear pins I8. The pitch of the pins I8 is twice that of the teeth of the ratchet wheel I4, so that, during one movement of the wheel I5, the end I 'I 50 of the lever 6 will be depressed by a pin I8 (see Fig. 2) against the action of a tension spring I9 so as to lift the roller 'I at the other end and turn the perforating rule I upright. During the next movement of the wheel I5, the pin I8 will force its 55 way past the end I'I of the lever 6, which latter then springs up against the succeeding pin I8 (see Fig. 1), and the torque spring 5 causes the rule I to be turned to the side (Fig. 4).

As shown in Fig. 5, a notched Wheel 28 may be secured on the shaft carrying the ratchet and pin gear wheels I4 and I5 respectively (Figs. 1 to 4), so that, as each step-movement of these wheels is completed, a notch 2I is brought opposite a spring-pressed catchv 22, which holds the whole mechanism against accidental displacement from the position desired at the moment.

Moreover, as indicated in Fig. 6, there may be mounted on a pivot 23, in the frame 3, a bracket 24 of inverted L-shape, such that when the pusher lever 6 has thrust the perforating rule I over to the upright position, the bracket may be brought under the raised end 25 of such lever. The rule I and lever 6 thereupon remain stationary in that position, notwithstanding lthe operation of the Vplunger I0 (Figs. 1 to 4). A spring washer 26 is provided on the pivot 23 to prevent the bracket 24 turning accidentally.

In Fig. 7, a cam device is shown which may be used in substitution for the pin gearing'described with reference to Figs. 1 to 4. The device comprises a cam 2T having a slot 28 in which engages a pin 29 carried by the end IIa of the pusher lever 6. The cam 2'I is rotatable with a step by step motion by a ratchet wheel 30, which is, in turn, actuated by a pawl-carrying plunger such as I0 already described. The slot 28 is shaped so that the ,lever 6 maintains the perforating rule I in its upright position during two successive depressions of the plunger IG (Figs. 1 to 4), and lets it drop to the inclined position at every third depression. As a consequence, pairs of successively printed sheets will be perforated, with the regular intervention of a single unperforated sheet.

In the modification shown in Figs. 8 and 9, the perforating rule 3| is carried by parallelrlinks 32 and is adapted to be raised thereon by a bentarm lever 33 against the action of a tension spring 34. The end 35 of the lever 33 projects into the path of the pins I8 of a pin wheel I5.

'I'his latter is operated by a ratchet wheel I 4, pawl I2 and plunger I0 as already described. Since, in this construction, the movement of the rule I is purely in one plane normal to the sheet .being printed, a more effective perforating action and subsequent separation of the rule and paper are obtainable than with a rule of the hinged type.

In practice, we have found that the invention gives very satisfactory results with all types of printing machines, and, where the perforating rule or member is of appreciable length, a plunger or other change-over mechanism can be provided at each end.

As a further alternative mode of operating the perforating rule, We may use wedge means which Will lift the rule, or let it fall, according as wedges, e. g., one wedge at each end-are moved in towards, or out from, the bottom of the rule. Such latter, moreover, may be made in sections instead of one piece. These sections may be connectible and disconnectible at will, to vary the length of the rule. In this case, where a change-over mechanism is provided for each end of the rule, one such mechanism will be adjustably mounted so that it can be moved to suit the different lengths. As will be appreciated, the joints of the sections may be of telescopic or other type giving transverse rigidity, with ease in longitudinal separation.

We claim:-

1. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member, of a change-over mechanism which, on the printing of the successive sheets is so actuated by a part of the machine that said member in predetermined sequence will leave unperforated certain sheets and perforate others.

2. In or for a printing machine having a type bed and platen, means for perforating sheets simultaneously with the printing thereof, comprising the combination of a perforating member, with means whereby said member is movably `mounted on the type bed, and a change-over mechanism which, at the successive movements of the platen against the type bed, is so actuated thereby that said perforating member, in predetermined sequence, will leave unperforated certain sheets and perforate others.

3. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a pertion automatically in accordance with the operation of the machine, and means whereby said perforating member is positively held when moved into its respective operative and inoperative positions.

4. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member, of mechanism whereby said member is moved into and out of operative position automatically in accordance with the operation of the machine, and locking means whereby, for the purpose of perforating all the sheets, the perforating member is separated 'from said mechanism and positively held in its operative position.

5. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member, of a change-over mechanism whereby said member is so moved into and out of operative position that pairs of successive sheets are perforated alternately with a single sheet left unperforated.

6. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising, in combination, a perforating rule, means for mounting said rule movably, spring means whereby said rule is normally constrained to occupy an inoperative position, and means whereby said rule is moved into operative position before each alternate sheet is printed.

7. In or for a printing machine having a type bed and platen, means for perforating sheets simultaneously with the printing thereof, comprising, in combination, a perforating rule, means for mounting said rule on the type bed movably, spring means whereby said rule is normally constrained to occupy an inoperative position, plunger means depressible by the platen when brought up to the type bed, ratchet mechanism operable by said plunger, and a shifting Ymeans in predetermined ratio with said mechanism so as to move said rule into operative position before each alternate sheet is printed.

8. In or forY a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member of unidirectional-drive vforating member, of mechanism whereby said `member is moved into and out of operative posimechanism whereby said member is moved into operative position automatically in accordance with the operation of the machine, and self acting means whereby at other times said member is maintained in inoperative position.

9. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member of unidirectional-drive mechanism whereby said member is moved into operative position automatically in accordance with the operation of the machine, self-acting means whereby at other times said member is maintained in inoperative position, and locking means whereby, for the purpose of perforating all the sheets, said member is positively held against operation by said self-acting means in the extreme position to which it is moved by said unidirectional-drive mechanism.

l0. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising the combination with a perforating member, of mechanism whereby said member is moved into and out of operative position automatically in accordance with the operation of the machine, and a spring detent whereby said mechanism is held against accidental displacement while the perforating member is in its operative and inoperative positions.

11. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof,.comprising the combination with a perforating member, of cam mechanism rotatable with a step-by-step motion, means for advancing said cam mechanism one step at each successive printing operation of the machine, and shifting means operable by said cam mechanism so as to move said member into and out of operative position.

12. In or for a printing machine having a. type bed and platen, means for perforating sheets simultaneously with the printing thereof, comprising, in combination, a perforating rule, means for mounting said rule on the type bed movably, spring means whereby said rule is normally constrained to occupy an inoperative position, plunger means depressible by the platen when brought up to the type bed, cam mechanism rotatable with a step-by-step motion by said plunger means, and shifting means operable by said cam mechanism whereby said member is so moved into and out of operative position that pairs of successive sheets are perforated, alternately with a single sheet left unperforated.

13. In or for a printing machine, means for perforating sheets simultaneously with the printing thereof, comprising, in combination, a perforating rule, parallel link means carrying said rule, spring means whereby said rule is normally constrained to occupy an inoperative position, and means whereby said rule is moved into operative position before each alternate sheet is printed.

JACOBUS DE RIDDER. WILLEM GERHARD BRILL.

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