US3138098A - Marking apparatus - Google Patents

Description

June 23, 1964 WORTH 3,138,098

MARKING APPARATUS Original Filed May 23, 1958 3 Sheets-Sheet l I22 I48 I24 I 204 I34 I08 I46 I58 I50 all Id?! INVENTOR.

June 23, 1964 F. c. WORTH 3,138,098

MARKING APPARATUS Original Filed May 23, 1958 3 Sheets-Sheet 2 DEE: 2

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MARKING APPARATUS Original Filed May 25, 1958 3 Sheets-Sheet 3 Fun-5.3

INVENTOR. FJ AA/c/S C MRTH United States Patent 3,138,098 MARKENG APPARATUS Francis (J. Worth, Ridgewood, N.Y., assignor to Adolph Gottscho, Inc, llilisitle, NJ, a corporation of New York Original application May 23, 195$, Ser. No. 737,393, now Patent No. 2,@%,illl5, dated Aug. 15, 1261. Divided and this application lune 12, 1961, Ser. No. 116,585

2 Claims. (Cl. 101-227) This invention relates generally to marking apparatus, and more particularly is directed to a marking apparatus elfective to intermittently apply markings to a continuous web or sheet, for example, to apply markings to successive sections or lengths of a continuous web of wrapping material which are to be cut from the latter in a conventional wrapping machine. This application is a division of my co-pending application, Serial No. 737,393, filed May 23, 1958, now US. Patent No. 2,996,005.

It is an object of the invention to provide marking apparatus of the described character which is effective to apply inked impressions to the continuous web of sheet material fed to an existing wrapping machine or the like, and wherein the marking apparatus can be installed without requiring modification or alteration of the existing Wrapping machine, while the marking apparatus is made to operate in synchronism with the operation of the wrapping machine in cutting off successive sections or lengths of the continuous web of Wrapping material.

Another object is to provide marking apparatus of the described character that is easily adjustable across the continuous web of wrapping material fed to the associated wrapping machine in order to permit the inked impressions to be applied at any desired lateral position on successive sections of the web.

In accordance with an aspect of the invention, a marking apparatus includes an inking roll rotatably dipping into an ink fountain or reservoir and in rolling contact with a metering roll which is, in turn, disposed for rolling contact with the raised marking surfaces of type elements or logotype mounted on a portion of the periphery of the die wheel. The inking roll and the shaft of the die wheel are positively driven, while the metering roll is freely rotatable and is frictionally driven by reason of its rolling contact with the continuously rotated inking roll. Although the shaft of the die roll is continuously rotated, a slip clutch is provided as the coupling between the die wheel and its shaft so that the die wheel can be intermittently held against rotation in a position where its type elements, logotype or other marking members are out of contact with both the metering roll and the continuous web passing over the related impression roll. In order to hold the die roll against rotation, the latter is provided with a projecting stop pin, and an abutment is mounted for movement into and out of the circular path of movement of the stop pin, such abutment being actuated by a solenoid which is, in turn, controlled by a switch actuated by a cam on the usual rotary cut-off of the associated wrapping machine.

The above, and other objects, features and advantages of the invention, will be apparent in the following detailed description of an illustrative embodiment thereof which is to be read in connection with the accompanying drawings forming a part hereof, and wherein:

FIG. 1 is a diagrammatic side elevational view of a marking apparatus embodying this invention and of those elements of an associated wrapping machine or the like which are essential for an understanding of the operation of the marking apparatus;

FIG. 2 is an enlarged side elevational view of the mark ing apparatus of FIG. 1, with a portion of a side wall of the housing thereof being removed to show the internal structure;

FIG. 3 is a sectional view taken along the line 3-3 of FIG. 2;

FIG. 4 is a detail elevational view which is partly broken away and in section and shows the arrangement for feeding ink in the apparatus of FIGS. 1, 2 and 3;

FIG. 5 is a detail sectional view taken along the line 55 of FIG. 2; and

FIG. 6 is a wiring diagram of an electrical control circuit for the marking apparatus embodying this invention.

Referring to the drawing in detail, and initially to FIG. 1 thereof, it will be seen that a marking apparatus em bodying the present invention and generally identified by the reference numeral 10 is mounted, in a manner hereinafter described in detail, on a cross bar 12 extending laterally above the path of movement of a continuous web W of wrapping material being fed through the infeed tunnel of a conventional wrapping machine from a supply roll 14 to the usual rotary cut-oif 16 of the conventional wrapping machine. Between the supply roll 14 and the rotary cut-off 16, the web W passes over a dancer or ten sioning roll 18 which is rotatably mounted, at its opposite ends, in pivoted arms 20, and the latter are resiliently urged in the direction for causing the roll 18 to tension the web W. After passing over the dancer or tensioning roll 18, the web W further passes over an impression roll 22, and then between feed rollers 24 disposed ahead of the location of the rotary cut-off 16. The impression roll 22 and feed rollers 24 are suitably driven in synchronism with the rotation of rotary cut-off 16 so that the web W is fed, as required, to the rotary cut-01f and is there intermittently cut into suitable sections or lengths which are to be employed for wrapping selected articles, such as, loaves of bread or the like.

Referring now to FIGS. 2 and 3, it will be seen that the marking apparatus 10 embodying this invention includes a housing which is generally identified by the reference numeral 26 and has opposite side walls 28 and 30, a cross member 32 joined to the upper edges of the side walls 28 and St) at the forward portion of the housing,

considered in the direction of movement of the web W indicated by the arrow 34 on FIG. 2, and a cover 36 extending across the remainder of the top of the housing between the upper edge portions of the side walls and removably secured to the latter, as by screws 38 having knurled heads. A front end wall 41) is pivotally mounted adjacent its lower edge on bolts 42 passing through the lower front corners of the side Walls 28 and 30 and is releasably held in closed position by a spring urged detent 44 (FIG. 2). The housing 26 is completed by a rear wall that includes a fixed lower portion 46 secured, as by bolts 48, to the side walls 28 and 30, and an upper portion 50 which is pivotally mounted adjacent its lower edge on bolts 52 passing through the side walls of the housing and which is releasably held in closed position by a resiliently urged detent (not shown) similar to the detent 44 associated with the pivotally mounted front end wall 40.

As can be seen in FIG. 2, the housing 26 is mounted from the cross bar 12 by means of a generally C-shaped bracket 54 extending upwardly from the cross member 32 to embrace the cross bar 12 at the top and one side of the latter, and a clamping plate 56 which is releasably secured across the open side of the C-shaped bracket 54 by bolts 58 in order to clamp the cross bar 12 between the bracket 54 and the clamping plate 56. Further, in order to adjustably determine the position of housing 26 relative to cross bar 12, the upper leg of the C-shaped bracket 54 has two locating screws 60 extending threadably therethrough at laterally spaced apart locations to engage the upper surface of cross bar 12, and lock nuts 62 are provided on the set screws 60 in order to prevent inadvertent rotation of the latter. It will be apparent that, by simultaneously rotating the set screws 60, the vertical position of housing 26 relative to cross bar 12, and hence also relative to the impression roll 22 which rotates about a fixed axis, can be adjusted, while the angular position of the housing relative to the cross bar and relative to the axis of the impression roll can be varied by suitable relative rotations of the two set screws 60.

The marking apparatus has a die wheel assembly generally identified by the reference numeral 64 (FIGS. 2'and 3) and including a laterally extending shaft 66 that is rotatably journalled adjacent its opposite ends in bearings 68 carried by the side walls 28 and in the forward end portions of the latter. A spur gear 70 is mounted on the end portion of shaft 66 adjacent side wall 28, and shaft 66 is made to rotate with gear 70, for example, by a pin 72 carried by the hub of gear 70 and engaging in a slot 74 extending axially in the surface of shaft 66.

The die wheel assembly 64 further includes a hollow body 76 telescoping axially over the shaft 66 and rotatable with respect to the latter. The hub of gear 72 is provided with an annular disc 78 (FIG. 3) of friction material which is glued or otherwise secured to the inner end face of the hub and frictionally engages the adjacent end surface of the die wheel body 76 so that, when the latter is urged axially toward the gear 70, the die wheel body 76 tends to rotate with gear 70 and shaft 66. In order to urge the body 76 axially toward the gear 70, the die wheel assembly 64 further includes a helical compression spring 80 extending around shaft 66 and interposed axially between an abutment disc 82 engaging against the bearing 68 carried by side wall 30 and a disc 84 which rides against ball bearings 86 in an annular race 88 abutting axially against the end of body 76 remote from gear 70.

The body 76 of die wheel assembly 64 carries members for securing marking elements which extend over only a portion of the circumference of the die wheel assembly. For example, as shown in FIG. 3, the outer cylindrical surface of body 76 may support locking rings 90 which are shaped in the manner disclosed in US. Letters Patent No. 2,643,609 issued June 30, 1953, to Ira S. Gottscho, in order to define annular, radially opening spaces therebetween for gripping suitable locking elements formed on the back surface of rubber type elements or logotypes T having raised characters corresponding to the inked impression to be applied to the web W. As in the above identified patent, the body 76 has a radial flange 92 adjacent one end thereof, and a locking nut 94 is screwed on the opposite end of the body 76 which is suitably threaded for that purpose so that the rings 90 can be axially compacted between flange 92 and locking nut 94 to se curely hold the locking elements on the back of the logotype T. It is to be understood that the housing 26 of marking apparatus 10 is located with respect to the impression roll 22 so that, as the die wheel assembly 64 is rotated, the raised marking surfaces of the characters on the type elements or logotype T secured on the periphery of the die wheel assembly by the locking rings 90 will come into rolling and marking contact with the web W passing over the impression roll.

In order to apply ink to the raised marking surfaces of the type elements or logotype T secured on the periphery of the die wheel assembly 64, the marking apparatus 10 may further include an upwardly opening ink fountain or reservoir 96 disposed in back of the die wheel assembly and having lateral, flat extensions 98 which are received in downwardly opening, elongated cutouts 100 formed in the bottom edges of side walls 28 and 30. The forward edges of the lateral extensions 98 and of the related cutouts 100 may be beveled, or inclined with respect to the vertical, as at 102 (FIG. 2) and a securing screw 104 extends forwardly through a suitably tapped hole at the center of the lower fixed portion 46 of the rear end wall of housing 26 to abut against a block 106 projecting rearwardly from the fountain 96.

An inking roll 108 is fixed on a shaft 110 extending parallel to shaft 66 of the die wheel assembly at a location above the lateral medial line of the ink fountain 96. Shaft 110 is rotatably journalled, adjacent its opposite ends, in bearings 112 carried by side walls 28 and 30 of housing 26. A gear 114 is secured on shaft 110 adjacent the inner surface of side wall 28 and meshes with an idler gear 116 which, in turn, meshes with the gear 70 on shaft 66 of the die wheel assembly. The idler gear 116 is rotatably mounted on a bushing 118 carried by a stud bolt 120 which is received in a suitably tapped bore in side wall 28. Thus, gear 70, and hence shaft 66 of the die wheel assembly, are rotated in response to rotation of the shaft 110 of the inking roll.

The arrangement for supplying ink to the raised marking surfaces of the type elements or logotoype T secured on the surface of the die wheel assembly further may include a metering roll 122 on a shaft 124 which extends parallel to the axes of shafts 66 and 110 and which has its opposite ends rotatably journalled in bearings 126 carried by arms 128 (FIGS. 2 and 5) disposed against the inside surfaces of side walls 28 and 30. Each of the arms 128 is pivotable about a screw 130 which passes through a smooth bore in the adjacent side wall 28 or 30 and is received in a tapped hole 132 formed in the arm 128 at a location spaced radially from the axis of shaft 124.

The inking roll 108 may include a rubber body 134 (FIGS. 3 and 4) interposed axially between metal discs or flanges 136, and the metering roll 122 may have an axial length substantially equal to the axial distance between the discs 136. As seen in FIG. 4, a doctor or scraper blade 138 is secured, as by screws 140 within the fountain 96 and engages the surface of the rubber body 134 of inking roll 108 at the front side of the latter where the surface of the inking roll is moving upwardly out of the body of ink within fountain 96, thereby to scrape the excess of ink from the inking roll prior to the transfer of ink from the latter to the metering roll 122.

It will be apparent that, in the described inking arrangement, the metering roll 122 mounted on the freely rotatable shaft 124 is frictionally driven by its rolling contact with the rotated inking roll 108. Further, it will be apparent that ink picked up by the inking roll 108 from a body of ink within fountain 96 and transferred to the metering roll 122 is then transferred from the latter to the raised marking surfaces of the type elements or logotype T on the periphery of die wheel assembly 64 as the latter is rotated to move such marking surfaces past the {metering roll in rolling contact with the surface of the atter.

In order to maintain a substantially constant supply or body of ink within the reservoir or fountain 96, the marking apparatus 10 may further include an inverted tank or container 142 having a removable closure 144 at its lower end from which a hollow stem or tube 146 depends (FIGS. 2 and 4). A longitudinally split tube 148 may be fixedly secured, at its upper end, in a suitable opening in the cover 36 of the housing 26 and be dimensioned so that the stem 146, when extended downwardly through the longitudinally split tube 148, will be frictionally retained in the latter with the lower end of the hollow stern 146 entering into a rearward extension 150 (FIG. 3) of the fountain 96. Thus, ink can pour from the container 142 through the hollow stem 146 into fountain 96 for replenishing the supply of ink in the latter as the ink is taken up by the inking roll 108.

The lower end edge 152 of hollow stem 146 may be cut at an acute angle with respect to the axis of the hollow stern so that the end edge 152 will be inclined from the horizontal when the container 142 is disposed in its normal operating position in which the hollow stem depends vertically into the ink fountain.

Further, the interior of hollow stem 146 may be formed with an upwardly facing valve seat 154 (FIG. 4) against which a ball or check valve 156 is urged by a spring 158, and a valve opening pin 160 may project upwardly from the rearward extension 150 of the reservoir or fountain 96 in axial alignment with the longitudinally split tube 148 carried by the cover 36 to unseat valve 156 when the container 142 is installed in its operative position with the stem 146 extending downwardly into the rearward extension 150 of fountain 96.

In accordance with this invention, the inking roll 108 is positively driven from the associated wrapping machine or the like in synchronism with the rotation of the rotary cut-off 16 of the latter and, for this purpose, an end of the shaft 110 is extended outwardly through side wall 28 and has a sprocket 162 fixed thereon (FIGS. 1 and 3) to be driven by a chain 164 which passes over a sprocket 163 on a rotated drive shaft 165 (FIG. 1) of the associated wrapping machine. Thus, inking roll 108 is continuously rotated in synchronism with the rotation of the rotary cut-off 16, and the metering roll 122 is similarly continuously rotated by reason of its frictional contact with the inking roll. It will also be apparent that, by reason of the gear train formed by the gears 114, 116 and 70, the shaft 66 of die wheel assembly 64 is also continuously rotated. The clutch disc 78 carried by gear 70 and frictionally engaging the adjacent end of the die wheel body 76 tends to rotate the latter along with the shaft 66. However, in the marking apparatus embodying this invention, the flange 92 of the wheel body 76 is provided with an axially projecting stop pin 166 (FIGS. 2 and 3) which is directed toward the adjacent side wall 28 and which is spaced radially from the axis of rotation of the die wheel assembly. Further, an abutment in the form of a pin 168 (FIGS. 2 and 5) is mounted for movement into and out of the circular path of movement of the stop pin 166 with the die wheel body 76 so that, when the pin 168 is moved into the path of movement of stop pin 166, as in FIG. 2, pin 166 moves into engagement with pin 168 to prevent further rotation of the die wheel body 76 and of the type elements or logotype T mounted on the periphery thereof while the friction disc 78 slips relative to the adjacent end surface of the die wheel body. On the other hand, when the pin 168 is moved out of the path of movement of pin 166, the die wheel body 76 is then free to be rotated with shaft 66 by the action of the clutch disc 78.

The stop pin 166 is preferably located with respect to the circumference of the die wheel body 76 so that, when pin 166 engages pin 168, the raised marking surfaces of the type elements or logotype T carried at the periphery of the die wheel assembly face away from both the metering roll 122 and the web W passing over the impression roll 22, as shown in FIG. 2, thereby to permit continued rotation of the metering roll and continued feeding of the web W without interference from the halted die wheel assembly. It will be apparent that, following each movement of the abutment pin 168 to its inoperative or released position out of the path of movement of the stop pin 166, the die wheel body 76 will be free to complete one full revolution.

In the illustrated embodiment of the invention, the abutment pin 168 extends from the lower end of a lever 170 which is pivotally mounted, intermediate its ends, on a pivot pin 172 carried by a block 174 which is secured, as by screws 176 and 178, to the side wall 28. A tension spring 180 is connected, at its opposite ends, to an anchor 182 provided on lever 170 above the pivot pin 172 and to an extension 184 of the screw 178 in order to urge the lever 170 in the clockwise direction, as viewed in FIG. 2, to a position where the upper end of lever 170 rests against a pin 186 (FIG. 5) projecting from block 174 and where pin 168 is interposed in the path of movement of the stop pin 166. Further, a solenoid 188 is mounted on the side wall 28, as by screws 190 and has a movable armature 192 which is pivotally connected, as by a pin 194, to one end of a link 196. The opposite end of link 196 is in the form of a hook 198 (FIG. 2) which extends around a pin 200 extending between the legs of an upper bifurcated end of the lever 170.

The solenoid 188 is arranged so that, upon the energization thereof, the armature 192 is retracted, thereby to pull the link 196 for rocking lever in the counterclockwise direction, as viewed in FIG. 2, so that the abutment pin 168 is then removed from the circular path of movement of the stop pin 166 and the die wheel body 76 is free to complete a full revolution.

In order to coordinate the operation of marking apparatus 10 with the operation of the rotary cut-off 16 of the associated wrapping machine, the electrical circuit for energizing the solenoid 188, as shown in FIG. 6, has a normally open switch 202 interposed therein, and such switch is actuated by a cam 204 (FIG. 1) secured on the shaft of the rotary cut-off 16 so that, during each revolution of the latter, and consequently during each cut-01f of a section or length of the web W, the solenoid 188 will be energized to release the abutment pin 168 from the stop pin 166 and thereby permit a full revolution of the die wheel assembly 64 for applying a suitable inked impression to the web W. At the end of such full revolution of the die wheel assembly 64, the type elements or logotype T, which occupy only a segment of the periphery of the die wheel assembly, will be returned to their normal rest position out of contact with both the web W and the metering roll 122. It is apparent that, by controlling the operation of the marking apparatus 10 from shaft of the rotary cut-off 16, the location of each inked impression along the web W will be positively registered with respect to the lengths or sections cut from the web W by the rotary cut-off.

Although an illustrative embodiment of the invention has been described in detail herein with reference to the accompanying drawings, it is to be understood that the invention is not limited to that precise embodiment, and that various changes and modifications may be effected therein without departing from the scope or spirit of the invention, except as defined in the appended claims.

What is claimed is:

l. The combination of a wrapping machine including a rotary cut-off means operative to cut successive sections from a continuous web during movement of the Web through said rotary cut-off means, which sections are utilized by said machine during repeated operating cycles for the wrapping of articles; and an apparatus for applying markings to the successive sections of the continuous web comprising a rotatable die wheel having marking means projecting radially therefrom over a portion of the periphery of the die wheel to effect rolling and marking contact with the web during rotation of the die Wheel, means driven by said machine for rotating said die wheel and including a slippable clutch, a projecting stop member movable in synchronism with said die wheel to move along a circular path during rotation of the latter, an abutment member, means mounting said abutment member for movement between an operative position, where said abutment member extends into said circular path to block rotation of said die wheel with said marking means facing away from said web and while said clutch slips, and an inoperative position where said abutment member is withdrawn from said circular path to free said die wheel for rotation, resilient means urging said abutment member to said operative position, electromagnetically actuated means energizable to move said abutment member to said operative position, circuit means for energizing said electromagnetically actuated means including a normally open switch, and cam means rotated in synchronism with said rotary cut-off means and operative to momentarily close said switch for only momentarily moving said abutment to its inoperative position during the cutting 01f of each section from the web, said abutment member being mounted at one end of a lever which is pivotally supported intermediate its ends, and said electromagnetically actuated means including a solenoid having a normally extended armature which is retracted upon energization of the solenoid, a link pivotally connected, at one end, to said armature and having a hook-shaped configuration at the other end opening generally in the longitudinal direction of the retracting movement of the armature, and a pin projecting from the other end of said lever and received in said hook-shaped end of the link to cause rocking of the lever in the direction moving said abutment member to its inoperative position upon energization of said solenoid.

2. The combination as in claim 1; wherein said stop 8 member and abutment member have cylindrical surfaces with parallel axes so that said abutment member can cam over said stop member during the initial rotation of said die wheel following the momentary energization of said solenoid.

References Cited in the file of this patent UNITED STATES PATENTS 2,061,893 Cady Nov. 24, 1936 2,205,838 Redd June 25, 1940 2,362,736 Weiss Nov. 14, 1944 2,435,369 Simonds Feb. 3, 1948 2,743,671 Weber et al. May 1, 1956 2,782,712 Clatf et al. Feb. 26, 1957 2,812,938 Haskin et al. Nov. 12, 1957 2,963,965 Baumgartner Dec. 13, 1960

Claims (1)

1. THE COMBINATION OF A WRAPPING MACHIEN INCLUDING A ROTARY CUT-OFF MEANS OPERATIVE TO CUT SUCCESSIVE SECTIONS FROM A CONTINUOUS WEB DURING MOVEMENT OF THE WEB THROUGH SAID ROTARY CUT-OFF MEANS, WHICH SECTIONS ARE UTILIZED BY SAID MACHINE DURING REPEATED OPERATING CYCLES FOR THE WRAPPING OF ARTICLES; AND AN APPARATUS FOR APPLYING MARKINGS TO THE SUCCESSIVE SECTIONS OF THE CONTINUOUS WEB COMPRISING A ROTATABLE DIE WHEEL HAVING MARKING MEANS PROJECTING RADIALLY THEREFROM OVER A PORTION OF THE PERIPHERY OF THE DIE WHEEL TO EFFECT ROLLING AND MARKING CONTACT WITH THE WEB DURING ROTATION OF THE DIE WHEEL, MEANS DRIVEN BY SAID MACHINE FOR ROTATING SAID DIE WHEEL AND INCLUDING A SLIPPABLE CLUTCH, A PROJECTING STOP MEMBER MOVABLE IN SYNCHRONISM WITH SAID DIE WHEEL TO MOVE ALONG A CIRCULAR PATH DURING ROTATION OF THE LATTER, AN ABUTMENT MEMBER, MEANS MOUNTING SAID ABUTMENT MEMBER FOR MOVEMENT BETWEEN AN OPERATIVE POSITION, WHERE SAID ABUTMENT MEMBER EXTENDS INTO SAID CIRCULAR PATH TO BLOCK ROTATION OF SAID DIE WHEEL WITH SAID MARKING MEANS FACING AWAY FROM SAID WEB AND WHILE SAID CLUTCH SLIPS, AND AN INOPERATIVE POSITION WHERE SAID ABUTMENT MEMBER IS WITHDRAWN FROM SAID CIRCULAR PATH TO FREE SAID DIE WHEEL FOR ROTATION, RESILIENT MEANS URGING SAID ABUTMENT MEMBER TO SAID OPERATIVE POSITION, ELECTROMAGNETICALLY ACTATED MEANS ENERGIZABLE TO MOVE SAID ABUTMENT MEMBER TO SAID OPERATIVE POSITION, CIRCUIT MEANS FOR ENERGIZING SAID ELECTROMAGNETICALLY ACTUATED MEANS INCLUDING A NORMALLY OPEN SWITCH, AND CAM MEANS ROTATED IN SYNCHRONISM WITH SAID ROTARY CUT-OFF MEANS AND OPERATIVE TO MOMENTARILY CLOSE SAID SWITCH FOR ONLY MOMENTARILY MOVING SAID ABUTMENT TO ITS INOPERATIVE POSITION DURING THE CUTTING OFF OF EACH SECTION FROM THE WEB, SAID ABUTMENT MEMBER BEING MOUNTED AT ONE END OF A LEVER WHICH IS PIVOTALLY SUPPORTED INTERMEDIATE ITS ENDS, AND SAID ELECTROMAGNETICALLY ACTUATED MEANS INCLUDING A SOLENOID HAVING A NORMALLY EXTENDED ARMATURE WHICH IS RETRACTED UPON ENERGIZATION OF THE SOLENOID, A LINK PIVOTALLY CONNECTED, AT ONE END, TO SAID ARMATURE AND HAVING A HOOK-SHAPED CONFIGURATION AT THE OTHER END OPENING GENERALLY IN THE LONGITUDINAL DIRECTION OF THE RETRACTING MOVEMENT OF THE ARMATURE, AND A PIN PROJECTING FROM THE OTHER END OF SAID LEVER AND RECEIVED IN SAID HOOK-SHAPED END OF THE LINK TO CAUSE ROCKING OF THE LEVER IN THE DIRECTION MOVING SAID ABUTMENT MEMBER TO ITS INOPERATIVE POSITION UPON ENERGIZATION OF SAID SOLENOID.

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