US1873057A - Paper registering device - Google Patents

Description

Aug. 23, 1932. E TH 1,873,057

PAPER REGI S 'IER IN Gr DEVICE Filed Aug. 20, 1930 2 Sheets-Sheet 1 INVENTOR. 22MB? Z. J/l/M y vim ATTORNEYS.

Aug. 23, 1932. E. SMITH PAPER REGISTERING DEVICE Filed Aug. 20, 1930 2 Sheets-Sheet 2 if v 1 .u u I \k. I III k\. Wm; MHU Q s 0 MN fa \M M I l I! I 0 NW Q INVENTOR. [2 iii/P1. Jlv/n/ BY ATTORNEYS.

.companying drawings, in

Patented Aug. .23, 1932 ELMER I7. SMITH, O1? LON'GW,

CHINEBY COMPANY, 01" BPBINGFIELILHASSACHUSETTS, A CORPORATION OF MAS- sacnusarrs rum ners'rmme nnvron Application filed August 20, 930. Serial a... 476,577. 1

This invention relates to registering devices for webs of such*mate1ial as printed paper or cellophane and is of the type causing the web to be arrested in its travel at each cycle with the printed portion of the web in predetermined registration with those elements of the machine, such as cutting or printing devices, which are to web, In the preferred form, t is control is attained by a photo-electric cell, the operation of which is controlled by the passage of some indicia on the web such as a portlon of the printed matter.

One object of the invention is to provide a device of this character in which the stoppage of the paper isbrought about b the deactivation of anelectromagnet. It as been found that the deenergizing of a magnet is much more positive in action than its activation, particularly necessary to cause the armature of'the ma et to move through an air gap by the fiorce of a magnet. further ob ect is to prov1dea providing perforations therein to control the electric circuit. A further object is to provide a device of this bands The preferred form of the invention will now be described with reference to the ac which:

Fig. 1 is a side elevation of a web registering device constructed in my invention;

Fig. 2 is a wiring diagram;

F Fig. 3 is a top plan view corresponding to ig. 1; F Fig. 4 is a detail section on line 44 of Fig. 5 is a detail of one form of Fig. 6 is a diagrammatic view one manner of producing intermittent motion of the web feed rolls.

Before describing the diflerent parts of the nech'anism in detail, its general operation vill be considered. 11 the preferred form,

erate on the l latter case it is.

accordance with web; and illustrating.

of a portion ofa printed label on the web causes the electromagnet to be deenergized and ermits the brake to be applied by the spring. The setting of the photo-electric cell is such that the deenergizing of the magnet occurs ust prior to the normal stoppage of the web at each cycle, varying in upon the distance between the due to shrinkage orst'retching of the web, and the function of the registering cut varyin lengths of web so that the line of cut is a ways spaced in a predetermined relationship to theprinted portion of the label. The detailed mechanism by which this is accomplished will now be described.

e evice is mounted upon a frame 16 I 1 be of any desired form'. Journalled upon this frame are feed rolls l1 and 12 between which the web w is led; The web passes also over guide rolls13 and 14 so as to be directed in proper relationship with the photo-electric cell and brake to t e mechanism operating them being designed so that at each machine cycle they tend to feed a length of web slighty in excess of what is required. Before reaching the feed rolls the web passes over a plate 15 adjacent to which is a movable brake his brake shoe is shown as bein mounted upon a lever 17 pivoted at 18 to the frame and urged in a direction to force the by a spring 19 strained the ma of a bell crank 25 pivoted to the frame at 26. The other arm of the bell crank bears a pin 27 running in a shortslot 28 formed in a link 29 which is urged in a direction to keep one end of the slot against the pin by a spring 30 fastened at one end to the pin 27 and at the other to a in 31 on the link 29. This link is connectc at 32 to the pivoted armature 33 of an electromagnet 34. During the normal running of the machine, the magnet 34 is energized and the armature 33 is kept in the position shown in Fig. 1. In.this position the pin and slot connection 27, 28'keeps the brake 16 out of contact with the web by means of the linkage described. Once in every cycle of the machines operation the magnet is dcenergized, as will e described later, thus releasing the linkage and permitting the spring 19 to force the brake 16 toward the plate 15. After this has occurred the armature is spaced from the magnet, and re-activation of the magnet is in general insufiicient of itself to cause the armature to move through the air gap against the resistance of thespring 19. It is well known that the attractive power of a magnet is very much greater when its armature is in contact with the magnet core than when thereis an intervening air gap.

To replace the armature positively against the magnet, the following mechanism is provided. The end of the second arm of the bell crank 25 carries a pin 35 running in a slot 36/formed in a plate 37. This plate is attached to a link 38 which is pivoted at 39 to one arm of a bell crank lever 40 swinging on the'frame at 41. The other arm of this bell crank carries a cam roll '42 running on a cam 43 fixed to the constantly rotating cam shaft 44. A spring 45 is strained between the second arm of the bell crank and a pin 46 on the frame and serves to keep the roll 42 constantly against its cam. The cam 43 has its surface formed so that once in each cycle of operation the bell crank 40 will be rocked and the armature 33 replaced against the core of gnet 34. The pin and slot connections 35, 36 and 27, 28 form lost motion connections between this cam and the magnet. The first of these connections ermits release of the armature upon de-activation of the magnet when the plate hand end of its travel. Fig. 1 shows the plate at substantially the right hand end of its travel. The second lost motion connection serves merely to prevent undue strain upon the armature when it is moved against the core, it being necessary merely to bring the armature 1nto contact with the core without more pressure than is afiorded by the light spring 30.

Mounted adjacent to the web w at a point prior to'the en agement of the web by the feed rolls is a photoelectric cell 50 mounted within a shield 51 having a hole 52 37 has been moved to the left-' the path of travel of.

upon the side adjacent the web. A constant hglht'source 53, which may be an incandescent amp, is placed directly 0 posite this hole so that the cell will be il uminated at all times except when the light is eclipsed by the passage of a printed portion of the wrap er over the hole. This printed portion 0 the web may be part of the regular design printed thereon or may be an area darkened particularly for this purpose. It will be understood that instead of operating a photoelectric cell in this fashion it could be caused to operate by the passage of a transparent area in a normally opaque web or could be actuated by reflected light instead of by transmitted light.

While the particular electrical connections of the photo-electric cell do not form a part of my invention but are of standard commercial nature, I have indicated diagrammatically in Fig. 2 one form of connection suitable for this purpose. The photo-electric cell 50 is connected through a grid, low tube 54 which serves as an amplifier to t e coil of a relay magnet 55, a transformer 56 furnishing the necessary electrical current. The connections shown are of such a nature that upon eclipse of the photo-electric cell the relay ma et is operated, attracting its armature 5 and releasing its contact arm 58 from the stationary contact arm 59. opens the magnet circuit 60 and causes armature 33 to be released.

The particular operation which is to be performed on the web may vary and the mechanism operating upon the web does not form a art of my invention. In Fig. 1 I

the

have in icated at 61 a line of out where the temporarily arrested web may be severed by any suitable device. If such a on device is used, the registering device cause the web to be severed at a predetermined point intermediate the printed areas a of the web 10, as shown in Fi 5. By shifting the photoelectric cell on e frame along the path of the web the relation of the line of out to the rin areas may be adj As stated ve, it is preferable to oper-' ate the feed rolls intermittently as this causes the slippage of the paper and introduces the least cause for error. urthermore by using intermittentl operated rolls the operation of the photoe ectric cell may be caused to occur just prior to the stopsurface speed. This also assists in increasing the accuracy of the device. The articular form of mechanism for rotating t e rollsmay be varied as desired and I have indicated in Fig. merely in the interest of completeness of disclosure. In this diagram the roll 11 is shown as provided with a gear 62 meshing with a gear 63 which carries a ratchet 64. Rotat- 6 onemethod of operation.

. normally holding 7 claim set the brake and of the machine and for this mounted upon'a tating shaft claim:

1. A web registering device comprising a rolls, mechanism or rotatcess of that required for feeding one unit of web under normal conditions, a brake adapted to stop the feeding movement of the web, to set the brake, a magnet the brake against the action of the spring, and means responsive to the passage of web-carried indicia for releastravel of the web. I

2. A web registering device as claimed in claim 1 having mechanism periodically acting to reset the magnet after its release. web registering device as claimed in l in which the indicia-responsive means comprises a photo-electric cell controlled by variations in light transmitted through the web.

4. A web registering device comprising a pair of intermittently actuated web feed rolls, a brake adapted to stop the feeding motion of the web so that the feed rolls will slip upon it, a spring tending to set the brake, a magnet normally holding the brake against the action of the spring, and means responsive to the passage of web-carried indicia for releasing the magnet during t e time just prior to the stoppage of the feed rolls an thus permitting the spring to interrupt the travel of the we A web registering device as claimed in a photo-electric cell controlled by variations 1n light caused by the a surface speed slightly in excess of that re- ;uired for normal web feeding operations, t web brake, a

spring tending to set the aim 4 having mechanism periodically actb, and a brake mature against the electromagnet. In testimony whereof I have affixed my signature.

ELMER L. SMITH.

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