US1876741A - Machine for continuous printing from tracings and the like - Google Patents

Description

Sept. 13, 1932. T 1,876,741

MACHINE FOR CONTINUOUS PRINTING FROM TRACINGS AND THE LIKE Filed April 5, 1928 5 Sheets-Sheet l Sept. 13, 1932. L. PETIT 1,876,741

momma FOR com'muous PRINTING FROM TRACINGS AND THE LIKE Filed April 5, 1928 5 Sheets-Sheet 2 L. PETIT Sept. 13, 1932.

MACHINE FOR CONTINUOUS PRINTING FROM TRACINGS AND THE LIKE Filed April 5, 1928 5 Sheets-Sheet 3 Sept. 13, 1932.

L. PETIT MACHINE FOR CONTINUOUS PRINTING FROM TRACINGS AND THE LIKE Filed April 5, 1928 5 Sheets-Sheet 4 Sept. 13, 1932. p rr 1,876,741

MACHINE FOR CONTINUOUS PRINTING FROM TRACINGS AND THE LIKE Filed April 5, 1928 5 Sheets-Sheet 5 I 26 I I 25. 1 l F T rx x I I k 43/ I l '39 37% I 2/ IQ I I9 N Patented Sept. 13, 1932 PATENT OFFICE LOUIS PETI'I', OF PARIS, FRANCE MACHINE FOB CONTINUOUS PRINTING FROM TBACINGS AND THE LIKE Application filed April 5, 1928, Serial No. 267,571, and. in Trance Kay 26, 1927.

Existing machines for continuous printing do not allow correct paying-out of the paper to be printed over all the length of a roller, since one side .of the paper is usually soon li carried against the side of the machine. This fault is mainly due to the fact that in these machines, the starting of the paper has to be effected by hand and substantially always in a manner causing warping of the sheet diificult to nullify; thecutting of the pa er is also an operation which cannot be e ected correctly during movement; finally, the illumination is provided by lamps with variable movement, the movement of which causes considerable slowing near the dead-points, from which result losses in time and illumination.

For these various reasons the functioning of these machines is very inferior to that required and their operation can only be confided to expert hands.

The object of the present invention is to provide a machine allowing regular passage of paper of great size on the whole length of large rollers and the obtention of continuous printing by reason of the obviation of the above-mentioned disadvantages. It comprises mechanisms for the movement of the paper and the cutting, which allow easy and correct execution of these operations by anyone. It comprises also means for the continuous displacement of the lamps, the movement of which may be limited according to the size of the paper used, and is effected at a constant speed without objectionable slowing at the ends of the travel.

The annexed figures show by way of example two forms of construction of the invention; Fig. 1 is a vertical section of a vertical machine, while Fig. .2 shows on an enlarged scale the cutting and feed mechanism.

Fig. 3 is a transverse section of the cutting mechanism.

Fig. 4.- is a transverse view of the lateral adjusting means for the paper.

Fig. 5 is a section of a horizontal machine, Fig. 6 representing on a larger scale the cutting anddriving mechanism.

1 is the frame of the machine, and 2 is a curved glass on the periphery of which slides an endless band 3, adapted to run over rollers 4, 4, 4", of which the firstis suitably driven.

When the paper to be printed is brought between the glass 2 and the endless band 3 (an operation effected mechanically and described in detail hereinafter) and is caught by the latter, the transparent negatives are introduced between the endless band andspring plate 5 to carry the sensitized paper on to the periphery o' the glass 2 to receive the light from the lamp or lamps arranged in the interior of the glass 2, and not shown in the drawings. It should be noted that the rollers 4 and 4: are so arranged as to ensure constant contact of the endless band 3 on the whole of the surface of the glass 2, and that the spring plate 5, tangential to the roller 4", allows free driving of the tracing or negative on the whole line of contact of the plate on the moving band.

When the sensitized paper and the negative commence to issue from the lower edge of the glass the operator raises the partition 6 into the position 6', seizes the extremity of the sensitized paper to carry the same on to the reel 7, whilst the negative or negatives is or are temporarily retained in the position 8, whence they fall into the position 9 only after the lowering of the partition 6.

The printed paper coming from the endless band is carried on to the hub 7 for engagement between the two half-round bars forming the same, and is there caught at its periphery by the rubbered roller 10, which is driven from the motor, the hub 7 being merely guided in lateral guides (not shown) and hearing by gravity on the driving roller 10.

The mounting of the roll of pa er to be printed, represented at 11, if effects by placing the same on a shaft 12, forming a mandrel, and is laterally guided thereon by the sides 13. The whole is placed in theblocks 14, 14', arranged on each side of the machine, and subjected on the one hand to the action of a spring 15, and on the other hand to the actionof a screw 16, which allows the paper to be printed to have its movement laterally regulated at any instant.

Correct tension of the paper unrolled is ensured by a. wiper 17, whose action is re ulable by an adjustable counterweight 18.

en the roll is in place it is only necessary for the operator to bring the end of the sheet between the roller 4" and the driving mechanism, the first element of which is constituted by the press roll 19, normally held at a small distance from the roller 4" and the endless band.

The press roller 19 is provided with rubber discs 20, between which are lodged the ends of gides 21, placed so that the sheet is caused, when introduced between the fixed block 22 and the cutting blade 23, to come into the position 24, where it is acted upon by the wedge 25. The wedge 25 is guided at its ends in the slots 26 of the guides 27, and is driven by means of rods 28 from the levers 29 (provided with a handle 30 and held in a mi dle position (position shown in dotted lines in Figs. 2-6) by springs 31, 31, acting on the lever 29.

When, in the form of construction shown in Fig. 2, the handle 30 is raised, the levers 29 act on the wedge 25 and raise the same into the position 25. On continuing the raising movement of the handle, the lever 29 is given a further movement, the axes 32 sliding in the grooves 33 of the rods 28 while stressing the spring 34, and this supplementary movement allows the ends 35 of the levers 29' to act on the ramps 36 of the cranked levers 3?, to cause the press roller 19 to bear on the endless band 3, which latter is driven in the sense of the arrow a. The paper is consequently driven and its end is caused to 00- cupy the position 24. At this instant, the upward movement of the handle 30 is terminated, so that the paper is no longer driven, the wedge being brought into the position 25, to fold before it the end of the paper. The downward action of the handle 30 causes the wedge to he pushed between the spring plate 5 and the endless band 3 (position 25") which, from this moment, clamps the folded paper on the end of the wedge 25 and commences to drive the same towards the glass 2. The actuation of the handle is then finished and the wedge returns to the position 25, to allow introduction of the negatives between the moving paper and the spring plate.

In this movement of the paper, the latter is turned round the exterior of the fixed block 22, on which it slides freely. It should be noted that this block is provided with a oove 38 with rounded edges in which is lodged the cutting wire 39, stretched between the arms 40 of the lever 41, and the tension of which is ensured by a spring blade 42 (Fig. 3).

When the end of the last negative to be printed reaches on the plate 43 a mark conveniently placed (at 44, for example) the lever 41 is moved rapidly upwards to bring the levers 40 into the position 40. (Fig. 2).

wire 39 returns into its recess, and the whole of themechanism is ready to be started again for the same procedure.

In the form of construction shown in Figs. 5 and 6, the arran ement of the parts is slightly different, the wedge 25 being arranged so that when it reaches the position 25, it acts by its rear end on the ends 36 of the levers 37 carrying the press roll 19. It thus allows passage of the sheet between the fixed block 22 and the cutting blade 23 to reach position 24, in which the wedge 25 is adapted to fold it and carry it between the spring plate 5 and the endless band 3 when the lever 30 is actuated in the direction I). The cutting lever 41 carrying the cutting wire 39 is actuated in the direction 0, to obtain the same effect as that previously described.

The displacement of the lamp or lamps (not shown) is obtained by means of a cord passing to one end of the machine on a pulley 45 and return pulleys 46. On the other side of the machine, the cord is carried over a pulley 47.

On the shaft 48 of the pulley 45 is fixed a pinion 49 engaging in a movable rack 50, whose end is pivoted at 51 to a lever 52, itself pivoted at 53 to a rod 54, terminated by a toothed extension 55 engaging a pinion 56, causing continuous reciprocating movement without appreciable slowing at the ends of the stroke. The lever 52 itself carries an extended part 57, toothed on one side, in which engages a pinion 58 also meshing with a fixed member 57 of similar form. The pinion 58 is adapted to be rotatably displaced to vary the point of oscillation of the lever 52, and consequently to vary the movement of the rack 51 and the cord 59, without altering the nature of the movement, which is always continuous, and without appreciable slowing down at the ends of the stroke. The pinion 56 is keyed to a shaft 60 which is driven by a wheel 61 and worm 62 from a motor 63, and transmits movement by means of a train of pinions 64, and a shaft 65, to the roller 4 driving the endless band 3.

The connection between the shaft 65 and the roller 4 is obtained from a movable member 66, sliding on the shaft 65 and carrying two pinions that engage on opposite sides of a toothed wheel 67, keyed to the roller 4.

The longitudinal movement of the member (36 is obtained from a lever 68, provided with a fork 69. It is thus possible to correct a false movement, without altering the movement of the lam or lamps.

It is to be an erstood that the constructional arrangements indicated in the embodiments above described are only given by way of example. The movement of the paper and the cutting thereof, in particular, have been shown, for the sake of clearness, as provided with separate control means, but it is evident that these may be formed by a single drive member with the necessary combined movement. Many other variations of construc tion can be imagined without exceeding the scope of the characteristics of the invention clauned below.

lVhat I claim is 1. A machine for continuous photographic printing which comprises a supporting frame, a supply roll mounted within said frame for rotatably holding a roll of photographic printing paper, means for braking said supply roll when a roll of sensitized paper is carried thereon, printing means having a glass surface, an endless driving band running in contact with said glass surface and having an inlet adjacent to said roll for printing paper, and automatic feeding mechanism located in the proximity of said inlet for feeding the sensitized paper across the entire width thereof from said supply roll to said endless driving belt.

2. A machine for continuous photographic printing which comprises a suporting frame, a supply roll mounted within said frame for rotatably holding a roll of photographic printing paper,printing means having a glass surface, an endless driving band running in contact with said glass surface and having an inlet adjacent to said roll for printing paper, automatic feeding mechanism located in the proximity of said inlet for feeding the sensitized paper across the entire width thereof from said supply roll to said endless driving belt and a cutting device for cutting the sensitized paper at the inlet of said endless hand, said device consisting of a wire, a housing for said wire, and a fixed knife disposed on the other side of the paper to be cut, the arrangement being such that the cutting movement of the wire is effected along the length of the knife to effect cutting at the edges thereof.

3. A machine for continuous photographic printing which comprises a suporting frame, a su ply roll mounted within said frame for rotatably holding a roll of photographic printing paper, printing means having a glass surface, an endless driving band running in contact with said glass surface and having an inlet adjacent to said roll for printing paper, and automatic feeding mechanism located in the proximity of said inlet for feeding the sensitized paper across the entire width thereof from said sup ly roll to said endless driving belt, said feeding mechanism including a feed bar of wedge shape type mounted transversely of the sensitized paper and arranged so that during the feed movement of the bar the free end of the paper is folded and introduced over the whole of its width under the driving band.

4. A machine as set forth'in claim 3 in which the feed bar acts between a driving roller of said endless driving band.

5. A machine as set forth in claim 3 in which starting mechanism is so arranged as to allow momentary advance of the end of the paper to bring the same into the correct ,POSItlOD before the feed bar operates.

6 A machine as set forth in claim 2 in wh1ch the paper passes during the starting operation within a cutting device constituted by a fixed knife, and a recessed block in which reposes a tensioned wire, the wire being movable towards the fixed knife to cut the paper symmetrically.

7 A machine as set forth in claim 3 in which the starting mechanism and the feed mechanism for the paper are controlled by a single member.

8. machine for continuous photographic pr nt ng, comprising a supporting frame, printing means having a glass surface, a supply roll mounted within the frame, an endless driving belt running in contact with sald glass surface, and having an inlet adjacent to said roll for the insertion of printing paper, automatic paper mechanism adjacent to said inlet, and automatic feeding mechanism for feeding the paper across the entire width thereof from said supply roll to said driving belt and feeding means, including a pressure roller positively movable to and out of contact with the roll and a feed bar to direct the paper into contact with the driving belt.

9. A machine of the character described and as claimed in claim 8, provided with a cutting device for severing paper from the rolll its entire width, at the inlet to the endless be t.

10. A machine of the character described comprising, in combination a supporting frame, printing means having a glass surface, an endless driving belt contacting with said glass surface. a supply roll mounted on said supporting frame, a pressure roll moving positively intoand out of contact with said roll, a stationary block over which the paper from the roll is carried, cutting means assoc ated with said block, and a feed bar operable to direct paper from the roll toward the driving belt.

11. A machine as claimed in claim 8, inwhich the supply roll is mounted on a shaft carried by laterally adjustable supports, the supply roll being held by means adjustable according to the width of the roll employed.

12. A machine for continuous photographic printing which comprises a supply roll for pa er, an endless hand runnin over a glass sur ace and mechanism for feeding of paper from the roll to the endless band, said mechanism including means for folding the paper and introducing it over its whole surface to the endless band.

13. A machine as set forth in claim 12, and including a wiper which contacts with the paper on the supply roll, and an adjustable counterweight controlling the same.

In testimony whereof I have signed my name to this specification this 21st day of LOUIS PETIT.

March, 1928.

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