US2549544A - Margining device for use in positive printing - Google Patents

Description

April 17, 1951 J. TESSIER MARGINING DEVICE FOR USE IN POSITIVE PRINTING Filed'Mar'ch 5, 1947 2 Sheets-Sheet 1 April 17, 1951 J. TESSIER MARGINING DEVICE FOR USE IN POSITIVE PRINTING 2 Sheets-Sheet 2 Filed March 5, 1947 Patented Apr. 17, 1951 UNITED STATES PATENT OFFICE: a

MARGINING DEVICE FOR USE IN POSITIVE PRINTING J ulien Tessier, Clamart, France Application March 5.1947, Serial No. 732,517 In France March 5, 1946 Margining devices as used in the printing .of full-size or enlarged positives and the like con sist of a frame whose masks are constitutedby two adjacent sides movable with respect to the fixed sides along graduated bars to provide for 4 Claims. '(Cl. 33184.5)

accurate adjustment and by bars movable with respect tosaid frame for the adjustment of the margin.

My invention is concerned with various improvements made in such margining devices {at the purpose of making them handier in use and more accurate in adjustment.

through a hole threaded in the side wall of the stationary casing, Whose outer end carries an operating knob and whose inner end engages one side of the parallelogram.

Another feature of my invention resides in that those parts of the mechanism which are pivoted A first improvement concerns the mechanism 3 for the adjustment of the movable bars designed to determine the margin of the print; said mechanism, which is mounted on a base plate is primarily composed of a parallelogram fixedly-,, pivoted to the base plate at two adjacent apices H and to a bar movable from the outside at its' two other apices one of the links of this parallelogram is operatively connected through a link to one arm of a bell-crank lever pivoted to the base plate and whose otherarm carries a pin projecting through an arcuate aperture in said base plate; the actuated arm of the bell-crank lever is also operatively connected with the corresponding arms of a pair of similar bell-crank levers.

to the first-mentioned ones; said pin is pivotally. connected with one arm of a bell-crank lever; similar to the ones already mentioned by a bar- Whose edge constitutes the stop line for another side of the. print at right angles to the firstmentioned one. I

The other arms of the third and the fourth bell-crank levers are pivotally interconnected b a 'bar or link.

Adjacent e. g. to the third bell-crank lever is provided a scale on which the set value of the margin can be read; the margining is efiectuated automatically in both dimensions of 'theprint] the two stop bars beingdisplaced synchronously ating screw.

on the base-plate are mounted on fulcrum pins set in by rivetingror otherwise secured to. the

base-plate and serving at the same time to locate and fix inside the stationary frame the base plate carrying the assembled mechanis'm with the aid of a few screws driven thereintothrough the top of the casing.

Another feature of my invention resides in the provision of a coil or like spring adapted to keep the mechanism in the adjusted position by counteracting any backlash in the mechanism contrawise to the adjusting screw.

A further feature of my invention resides in the provision of a stay bar pivoted at a 'point of its length to one side of the frame hinged to the stationary casing, which bar is formed at one end in the shape of a hook adapted to cooperate with a stud on said stationary casing to keep the frame in its raised position to allow adjusting the position of the stop bars and locating the prints.

Still another feature of the invention resides in the provision of a short propping bar pivoted to one side of the frame, provided with an operating knob and adapted to keep the frame in a lower position. Other features and advantages of -my margining device will be pointed out in the'following description of a preferred embodiment of the same, in the course of which reference will be had to the appended drawing in which:

Figure 1 is a plan view of the margining device.

Figure 2 is a side view of the same, the frame being shown in its raised position.

Figure 3 is a plan view of the mechanism with its stationary casing removed.

Fig. 4 is a vertical sectional view taken on line IVIV in Fig. 3 and also according to line A-A of Fig. 1.

Fig. 5 is a vertical sectional view of the mechanismassembled and fixed inside of the stationary I casing, the plane of the section being indicated by the lines B-B inFigs. land '3.

The margining device is composed essentially the aid of another pair of sides or masks Hi, It

carried by and slidable lengthwise of sides 6, 1 respectively and locked in the desired positions by screws l2.

The frame is held in raised position by means of a stay l4 pivoted on a pin to the frame side 6 and formed at its remote end it 'with'a notch designed to cooperate with a stud I! carriedrby the casing.

The frame can be held in half-raised pellets by a short propping bar it pivoted to the frame side 5 on a pin 19 knob. I The mechanism for the accurate and quick adjustment of -the margin size is as follows (Figs 3 to 5) A base plate 3 is cut out as illustrated in Fig. Sto fit inside of the stationary casing I and carries centrally threaded fulcrum pins 21, 22,

provided 'with an operating 23, 24 into which fastening screws 25, 26, 21, A

etc., are secured through the top of the casing enclosing and locating the mechanism in the space delimited between said top and base plate 3 and leaving under said plate another space for 'mdving the stop barsBl and 5ilthrough the action P of said mechanism. I p v Mounted on the fulcrum pins 24 are a pair of links 28, 29 which, in association with a bar 38, constitute a parallelogram; the 'bar 38 can be acted upon with the aid of a screw 3! threaded through a hole tapped in the stationary casing. The action upon bar 30 is transmitted through the link 22 and a connecting bar 32 to one arm of a bell-crank lever 34 pivoted at 23 and whose other arm carries a pin 35 projecting through w an arcuate aperture 36 milled in the base-plate; pivotally secured to said pin below the baseplate 3 in a bar 3'! providing one of the print squaring side stops.

Mounted on fulcrum pin 22 at some distance from the bell-crank lever 34 isa similar bellcrank lever 33 whose pin 38 projects likewise through an arcuate aperture 49 in the base-plate below which the other end of the bar 31 is 5 ivotally connected with said pin 39. o

A helical-spring 48, as seen in Fig. 3, has one end fastened-to the base 3 and its other end fastened to an arm 4| of the bell-crank 38. Parts" hereinafter described cause the arm 4| to be moved when the screw 3i 'is operated. The spring therefore moves the arm li in opposition to that of the pressure screw 3| and also eliminates play in the various pivotal connections of the parts.

The arm 4| of the bell-crank lever 38 is pivotally connected with a coupling bar 4? connecting the arm "33' of bell-cranklever-M with'the' arm 43 of a bell-crank lever 44 associated with a similarbell-crank lever '45; the'fulcruins of ":be 1 l crank levers '44 and 45 are located on a li ne at right angles to the line through 22 and 23 and are constituted by centrally threaded fulcrum pins 2i which at the same time serve to maintain and locate the base plate '3 carrying the mechanisminside' the stationary casing l V The arms 43am 46 of the bell-crank' levers 4 44 and 45 carry pins projecting through arcuate apertures 41, 48 cut in the base-plate at right angles to apertures 36, 49; pivotally secured to the ends of said pins below the baseplate 3 is a bar 56 at right angles to bar 42. The other arms of the bell-crank levers 44, 45 are interconnected by a coupling bar 5 I. Graduated on a portion of the plate 3 projecting to the outside of the stationary casing l adjacent to the slot 411s a scale 53.

It will be appreciated that with this mechathem any deformation of the parallelogram 24,

' '28, 2'9, 30 by the action of the screw 3| results in synchronous displacements of the stop bars 3'! and 50 by the action of the two sets of bell-crank levers 34, 38, 44, 45, which displacements are ex- 'actly indicated on the scale 53.

,Theoperation of this margining device is as follows After the masks IE! and ll have been correctly positioned with respecttofthe graduations on scales 3 and 9 the frame is raised and held in its new position with theaid of the sta M or the propping bar l8, whereafter the screw BI is actuated to adjust the margin width as desired by reference to the scale 53, the sheet of printing paper is laid in'with two edges thereof exactly abutting the stop bars 31 and 50 and the frame is dropped again.

It is to be understood that the invention is by no means limited to the embodiment described hereinbefore merely by way of example, and that inodificatiohs may be made in the arrangement of the mechanism, the mounting of the parts on the base-plate, the connection of the cover plate with said base-plate, the connection of the cover plate with said'bas e plate, etc., without thereby departing from the scope of the invention. What 'I claim as my invention and desireto secure by Letters Patent is: v v s l. A margining device for use in positive printing of the type comprising a rectangular frame providing a mask, two adjacent sides of which 6, I constitutea rigid unit similar to a carpenterfs square, two graduated rails 8, 9 respectively fastened to said two adjacent sides 5, l, the two other sides l0, ll being adjustable by sliding on the graduated rails 8, 9 along the two first sides as desired, and a pair of horizontal margining stop bars'SB, 3 parallel respectively with either side 5, l of said rigid unit and horizontally adjustable perpendicularly to their direction as desired, in combination with a stationary casing I to which one i of of the first sides of said rigid unit is hinged on 'a horizontal line, means 14, 18 to support s'aid'rigidunitihat least one raised position around said horizontal line and in dropped position as desired, a movement trans?- mitting mechanism ho used inside of the stationary casing 'l and operatively associated withboth marginingstop bars 503'l to provide for adjustment of said stop bars horizontally simultaneously in parallel motion towards the center of the maskt, 7, I2, I l or outward and means to actuate said mechanism. 2. A margimng device for use in positive printing of the type comprising a rectangular frame providing a mask, two adjacent sides of which 5, l'consti'tute a rigid unit similar to a carpenters square, two graduated rails 8, 9 respectively fastened to'saidtwo adjacent sides 5, l, the two other sides It, being adjustable by sliding on the graduated rails 8 allonglthe two first sides as desired and a pair of horizontal margining stop bars 50, 3'! parallel respectively with either side 6, 1 of said rigid unit and horizontally adjustable perpendicularly to their direction as desired, in combination with a stationary casing l to which one 1 of the first sides of said rigid unit is hinged on a horizontal line, a stay bar [4 pivoted to the other side of the said rigid unit and adapted to be removably anchored to said stationary casing I for the purpose of keeping said rigid unit in raised or dropped position as desired, a movement transmitting mechanism housed inside of the stationary casing l, and operatively associated with both margining stop bars 50, 31 to provide for adjustment of said stop bars horizontally simultaneously in parallel motion towards the center of the mask 6, 1, ll], H or outward, and means to actuate said mecha- 1115111.

3. A margining device for use in positiv printing of the type comprising a rectangular frame providing a mask, two adjacent sides of Which 6, 1 constitute a rigid unit similar to a carpenters square, two graduated rails 8, 9 respectively fastened to said two adjacent sides 6, 1, the two other sides Ill, ll being adjustable by sliding on the graduated rails 8, 9 along the two first sides as desired, and a pair of horizontal margining stop bars 50, 31 parallel respectively with either side 6, 1 of said rigid'unit and horizontally adjustable perpendicularly to their direction as desired, in combination with a stationary casing l'to which one 1 of the first sides of said rigid unit is hinged on a horizontal line, means l4, 18 to support said rigid unit in at least one raised position around said horizontal line and in dropped position as *desired, a movement transmitting mechanism housed inside of the stationary casing I, and operatively associated with both margining stop bars 50, 31 to provide for adjustment of said stop bars,

horizontally simultaneously in parallel motion towards the center of the mask 6, 1, I0, I l or outward, said mechanism comprisin a horizontal base plate 3 fixed inside of the stationary casing I, a pair of bell-crank levers 34, 38 pivoted each on a separate pivot to said horizontal base plate and pivotally connected with that 31 .of said margining stop bars which is parallel to the hinged said. 1 of the rigid unit 6, 1, another pair of bellcrank levers 43, 45 pivoted to saidbase' plate 3 and pivotally connected with the other 50 of said margining stop bars, a-bar 42 coupling one arm T of the levers in the first-mentioned pair with one arm of one lever in the last mentioned pair, a further bar 5! coupling the levers in the last-mentioned pair with each other, the arm lengths of these various bell-crank levers being so proportioned, that either stop bar 50, 31 shall be displaced in parallel motion by an amount suitably related to the displacement of the other, and means to move any one of said levers as desired.

4.. A margining device for use in positive printing of the type comprising a rectangular frame fil providing a mask, two adjacent sides of which square, two graduated rails 8, 9 respectively fastened to said adjacent sides 6, 1, the two other sides l8, II being adjustable by sliding on the graduated rails 8, 9 along the two first sides as desired, and a pair of horizontal margining stop bars 59, 31 parallel respectively with either side 6, 1 of said rigid unit and horizontally adjustable perpendicularly to their direction as desired, in combination with a stationary casing I to which one 1 of the first sides of said rigid unit is hinged on a horizontal line, means I4, l8 to support said rigid unit in at least one raised position around said horizontal line and in dropped position as desired, a movement transmitting mechanism housed inside of the stationary casing I and operatively associated with both margining stop bars 50, 31 to provide for adjustment of said stop bars horizontally simultaneously in parallel motion towards the center of the mask 6, 1, I0, I l or outwards, said mechanism comprising a horizontal base plate 3 fixed inside of the stationary casing l, a pair of bell-crank levers 34, 38 pivoted each on a separate pivot to said horizontal base plate and pivotally connected with that 31 of said margining stop bars which is parallel to the hinged side 1 of the rigid unit 6-, 1, another pair of bell-crank levers 43, pivoted to said base plate 3 and pivotally connected with the other 50 of said margining stop bars, a bar 42 coupling one arm'of the levers in the first-mentioned pair with one arm of one lever in the last mentioned pair, a further bar 5! coupling the levers in the lastmentioned pair with each other, the arm lengths of these various bell-crank levers being so proportioned that either stop bar 50, 31 shall be displaced in parallel motion by an amount suitably related to the displacement of the other, an actuating lever 29 pivoted to the stationary casing l, a link 32 connecting said lever with one of the bell-crank levers, means 3| to move the whole system of levers and bars in one or the other direction andto secure said system as desired, and a spring 40 pulling on the same in the proper direction to take up any backlash in the mechanism.

J ULIEN TESSIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 754,086 Nichols Mar. 8, 1904 2,114,946 Trotter Apr. 19, 1938 FOREIGN PATENTS Number Country Date 19,759 Great Britain Sept. 1, 1913

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