US3283881A - Universal feeding device for wrapping machines, particularly for wrapping machines for sweets - Google Patents

Description

c. TARTARINI 3,283,881

PARTICULARLY Nov. 8, 1966 UNIVERSAL FEEDING DEVICE FOR WRAPPING MACHINES FOR WRAPPING MACHINES FOR SWEETS Filed Feb. 18, 1965 c I M? 1, J a "W A 1 "i2 3 k a! E 5 )0 I I .lz... m h 3 i=2 a E! 1 w, w A w K I 3 MM WT? 0. 7 W; 5 l w 4 m 1 W w m 3 4/ f0 0 1/ 5 m y a w b im d INVENTOR. w C save aden-um BY Agent Nov. 8, 1966 c. TARTARINI 3,283,

GB FOR WRAPPING MACHINES, PARTICULAR FOR WRAPPING MACHINES FOR SWEE UNIVERSAL FEEDING DEVI 5 Sheets-Sheet 2 Filed Feb. 18, 1965 INVENTOR. (I fesqre lmfanm Nov. 8, 1966 c. TARTARINI 3,283,831

UNIVERSAL FEEDING DEVICE FOR WRAPPING MACHINES, PARTICULARLY FOR WRAPPING MACHINES FOR SWEETS Filed Feb. 18, 1965 5 Sheets-Sheet 5 LNVENTOR. B CQSQTG lmtanni Age mt United States Patent 3,283,881 UNIVERSAL FEEDING DEVICE FOR WRAPPING MACHINES, PARTICULARLY FOR WRAPPING MACHINES FOR SWEETS Cesare Tartarini, Via Roma 38, Zola Predosa, Bologna, Italy Filed Feb. 18, 1965, Ser. No. 433,576 Claims priority, application Italy, Feb. 21, 1964, 4,295/ 64 3 Claims. (Cl. 198-24) The present invention refers to a universal feeding device for wrapping machines, particularly for Wrapping machines for sweets.

It is known that particularly in sweets industry one and the same wrapping machine may be easily adapted to operate on products with different shapes and/ or dimensions and to carry out wrappings of different types. To this purpose it frequently sufiices to adjust or replace a negligible number of operating members of the wrapping machine.

It is however, not always possible to feed in the same manner the different products to the wrapping machine so that in such cases the feeding system has to be changed.

A typical example is the usual wrapping of e.g. rectangular blocks or slabs or small bars of chocolate or the like as compared to the tufted wrapping of small blocks of chocolate or similar sweets having e.g. a frustoconical or dome topped cylindrical form, which hereinafter will be called boeri.

Also in this case one and the same wrapping machine may be easily adapted for both types of wrappings. It is however necessary to deliver the product with a different orientation. In fact while the chocolate slabs may be fed to the wrapping machine in the flatwise position in which the same are disposed on the feeding device, by simply shifting them from the feeder towards the wrapping machine, the boeri which are disposed with their flat bottom on the feeding device, must be delivered to the wrapping machine in an overturned position, so that the delivering stage of the feeding operation requires a combination of rotating and shifting movements.

For this reason the known feeding devices had to be changed when passing from one to the other wrapping operation. Furthermore the known feeding devices for tufted wrapping are complicated and slow in operation, owing to the plurality of movements they have to carry out. As a consequence, also the operation of the wrapping machine must be slowed down, thereby greatly reducing the efficiency of the wrapping machine.

The object of this invention is to provide a feeding device for wrapping machines apt to function indifferently with products of the normal wrapping type as with those requiring a tuft.

A further object is to make available a feeder which, while being apt to deliver the products to the wrapping machine correctly orientated, will not limit the operation velocity of the said machine.

A further object is to provide a feeding device for wrapping machines which operates at high rhythm even with products requiring a tuft.

A further object of the present invention is to make available a feeder of great flexibility, that is capable of being adapted to various product shapes.

Another important object is to provide a feeding device endowed with safety devices apt to block the action in the case of irregularity in the flow of products or of their irregular position.

An object is also that of making available a simple and rational feeder which renders of universal use the machine to which it is coupled, this being already structurally universal.

3,283,881 Patented Nov. 8, 1966 The characteristics and advantages of the invention will result clearer from the description of an embodiment preferred, but not exclusive, of a feeding device according to the invention illustrated by way of example in the attached drawing in which:

FIGURE 1 is a section view along the line II of FIG. 2;

FIGURE 2 is a section view of the feeding device, along the line 11-11 of FIG. 1;

FIGURE 3 is a lateral view of the means for blocking the rotary motion of the elements carrying the seizing and pushing members. In the representation the part of the supporting box has been omitted;

FIGURE 4 is a schematic and partial view of a wrapping machine to which the feeder, the object of the present patent, has been applied;

FIGURES 5 and 6 show details of certain operative members.

Referring to the said figures, in which the same element always retains its own index number, there is provided a box support 1 inside which is journalled thereon a driving shaft 2 on which the cams 3, 4, 5 are keyed. The first two present slots 3a and 4a cut into the facing sides, forming an endless curve, and are thus of the type which determine a positive action both in forward and reverse drive, whereas the cam 5 is of the normal radial action type controlling only one stroke.

Couples of ears 6 and 7 arranged perpendicularly to the said shaft 2 rise from the bottom 1a of the box support at opposite sides with respect to said shaft 2 and have at the summit seats for the pins 8 and 9 which thus result parallel to the said main shaft 2.

A lever 10 of the central power type is pivoted on the pin 8, and on the pin 9 are pivoted the levers 11 and 12 the first of which is similar to that designated 10 and the second in the form of an elbow and having its fulcrum at the vertex thereof.

The levers 10 and 11 c0-operating with cams 4 and 3 respectively have rollers or followers 10a and 11a in their central part which revolve on pins fixed thereon perpendicularly to the plane in which they oscillate. The rollers are received in the slots 4a and 3a of the cams respectively which thus determine an oscillation of the free extremities of the said levers.

A similar roller or follower 12a is provided on the extremity of the lever 12, this roller co-operating with the rim face of the cam 5.

The cams 3 and 4 are of the bilaterally acting type, whereas the cam 5 is of the unilaterally acting type.

The free extremities of the levers 10 and 11 are in the form of a fork indicated with the numbers 10b and 11b for the first and second lever respectively.

A connecting rod 14 is hinged to the fork 11b by means of a pin 13, and connects the fork to the central part 15a of a trestle piece 15 having seats on the arms 15b and for the slidabl-e insertion of an extremity of a tubular or hollow shaft 16, the said trestle piece being slidably engaged by a sleeve 17 inserted between its arms and fixed to the shaft, thus it is engaged to the shaft such that this can rotate but not slide independent of it.

The shaft 16 is supported at the opposite end to that carried by the trestle piece 15 by a bush 18 fixed by screws which engage one of its flanges, to the front wall 1b of the box support of the device. Between this and the shaft 16, at the end thereof protruding to the outside of the box support, there is a seal ring 19 maintained in the seat formed in the boss by a ring 20.

On the end of the shaft 16 which protrudes to the outside there is provided a ring 21 in anti-friction material acting as a supporting element for means of seizing or pushing described below and as an anti-friction element for a telescoping shaft 22 inserted inside 16 in which it is free to run. Forthe supporting of the said internal shaft the hollow one also has anti-friction means at its second extremity, constituted by a bush 23.

A trestle piece 24 is engaged with the internal shaft 22, in a rotatorily slidable relation, like the trestle piece 15 with the shaft 16, which allows the shaft to rotate but which is fixed axially to said trestle piece 24 by a sleeve 25 fixed to the said shaft 22 between the arms 24b and 240.

A connecting rod 26 is hinged on the central part 240 of the trestle piece 24 and connects it to the fork b of the lever 10. The second extremity of the shaft 22, the first protruding to the outside through the hollow shaft, is supported by a boss 27 fixed by screws to the box support at the wall 16 thereof. it is evident at this point how on rotation of the shaft 2 on which the cams 3 and 4 are keyed the shafts 16 and 22 run inside their respective bosses and how these, shaping in a desired manner the form of the cams, can follow a certain law in their rectilinear reciprocal motion, in particular moving with intermitted rectilinear reciprocating motion. It is also clear that again with appropriate shaping of the cams, a relative motion between the two shafts can be added to the motion thereof relative to the box support and thus they can actuate seizing members as will be illustrated later.

The articulated levers 11, 14 and 10, 26 form respective kinematic chains through which motion is transmitted from the respective follower members 11a and 10a to the hollow and telescoping shafts 16 and 22 respectively.

On the extreme surface of the boss 18 there is a sleeve 28 having an car 2841 extending radially thereto to which is fixed a guide or rod member 30 by means of screws. The second extremity of the said guide is joined by screws 32 to an ear 31a of an element 31 inserted on the boss 27 acting as a pivot for it.

The central part 30a of the guide presents a slot inside which the bearings 34 and 35 are inserted acting as fo lers and sustained by pins 36 and 37 fixed to the sleeves 1'7 and 25 respectively. Evidently the presence of the guide or rod member 30 does not prejudice the running of the shafts 16, 22 under the action of the cams 3 and 4 as on the other hand the action of the levers 10, 11 working in cooperation with the said cams 3, 4 and the said shafts 16, 22 do not impede a partial rotation of said shafts 16, 22 which can take place by provoking the rotation of the sleeve elements 28, 31 which support the guide 30.

The connecting assemblies 15, 34, 36 and 24, 35, 37 are of the bush-lock type.

For the rotation of the guide 30 the element or sleeve member 31 has a fork 33, again extending radially as the ear 31a, in which a tie-rod 39 is engaged by means of a spherical joint 38, and whose second extremity engages wiith another spherical joint 40, at the extremity 12b of the lever 12 actuated by the unilaterally acting cam 5 which, as already said determines only one stroke, whereas the return stroke is controlled by a spring 41 acting by tension between the said lever and the pin 42 fixed to the wall 1c of the box support. It is clear how the spherical joints interposed between the fork 33 and the tie-rod 39 and between this and the extremity 12b of the lever 12 allow the transmission of motion, even though they are elements at 90 to each other and moving their extremes through circle arcs.

The articulated levers 12 and 39 form a further kinematic chain for the transmission of motion.

The sleeve 28 in addition to the ear 28a to which the guide 30 controlling the rotation of the coaxial shafts 16 and 22 is rigidly fixed, has a second one again extending radially, indicated by 28b to which is fixed a plate or stop means 44, by means of the screws 43, of hard material and conforming to a sector of a circular crown.

A hook or pawl member 45 cooperates with the plate or stop means 44, and is fixed with screws 46 to a radial extension 47a of a sleeve 47 keyed to the end remaining inside the box support of a shaft 48 (the support of the shaft 48 is formed in the box support at the front wall thereof, and in the figure only the thickening of the wall corresponding to the rim of its bearing portion can be seen, and in particular the thickening which acts as the support for the said shaft has not been shown in FIG- URE 3 in order not to impede the view of the elements keyed to the external extremity of the said shaft).

A pin 49 is also fixed to the sleeve 47, to which the extremity of a string is anchored (not shown) acting in the sense of engaging the hook or pawl member 45 to the edge of the sector 44. Evidently when this happens, that is reciprocal engagement between sector and hook, the pair of coaxial shafts can rotate in one sense but cannot return to the initial posit-ion until the above mentioned reciprocal engagement ceases.

' At the extremity of the shaft 48 outside the box support an arm 50 is fixed whose length is such thatits extremity 50a sensibly surpasses the upper face of a plate 51 placed on the prolongation of the upper face of a conveyor ban-d 5-2 supported by two rollers 53 (of which only one is represented) and placed at the side of :a loading hopper 54. The extremity 50a of the arm 50 is also sensibly developed in width in order to substantially take care of the whole back edge of the said plate 51 on which the products to be wrapped are pushed by the combined action of the band and of the products conveyed by this, thus because of the above said pushing action which is exerted on it, the product in the lead engages the extremity 50a of the arm 50 and thus 0vercoming the spring engaged on the pin 49, determines the rotation of the lever formed by the said arm 50, on the shaft 48 and on the hook 45 which disengages the sector 44 and thus, if a product is in such a position as to determine the above said action, allows the return rotation of the pair of coaxial shafts 16, 22.

It is pointed out that the conveyor 52 performs an intermit-t-ent or tripping motion synchronized with the motion of the feeding device, so that the conveyor tape advances always in that moment in which the operative members of the feeding device reach a preestablished position.

In this way a safety blocking device is realized through which the hereinafter described means 55 or 57 and 58 for pushing or seizing of the products act only when the said products are in the correct position and can be handled also by thewr-apping machine, in addition to the feeder, engaging them with their formed surfaces in the required position.

In FIGURE -3 in addition to the members just described there appears a blade element 55 of right angled form constituting a pusher, joined to the head ring 21 of the hollow shaft 16, and the length of the arm joined to the shaft 16 is such that its second arm takes up a posit-ion in line with the upper face of the plate 51.

This second arm has a recess 56 and the section thereof extending from 50a of the arm 50 onwards, i.e. the part of it that remains positioned above the plate 51 has a length not greater than the width of a product to be wrapped.

In place of the above described pusher 55 the feeder can be endowed with different seizing members with which to seize the products, effect a transportation and at the same time a partial rotation. The seizing members, partially illustrated in FIGURES 1, 4 and 5 are constituted of blocks 57 and 58 having surfaces shaped so as to couple or mate with the shape of the product to be seized (boero illustrated in FIGURES '4 and 5 with the number 59) and fixed by means of screwed adjusting means and supporting armsor gripping means 60 and 61 conforming substantially to a U shape and having the sides located in different planes such that on rotating they do not interfere with the elevator 62 of the wrapping machine.

The operation of the feeder described, supposing that the principal shaft 2 be joined for the synchronization to a shaft of the wrapping machine and supposing also that the conveyor be connected to a suitable synchronized supply of rotating motion, is the following: the products are located on the hopper 54, the wrapping machine is put into operation and so also the feeder; then the products are pushed from the hopper 54 to the band 52.

For the Wrapping of elements not requiring a tuft the feeder is rigged as illustrated in FIGURE 3, that is with a pusher 55 joined to the extremity 21 of the hollow shaft 16 and whose initial position corresponds to that illustrated in the said FIGURE 3, then the forward or working stroke of the said pusher 55 is that effected with its arm in line with i.e. skimming the upper face of the plate 51.

In the interval between the putting into operation and the arrival of the first products at the vactive zone of the feeder, this latter and the wrapping machine are idling. in fact as regards the former with the rotation of the cam group the pair of coaxial shafts 16, 22 advance, and arriving at the point of inversion of the motion they rotate under the action of the cam 5 and, again under the action of the cam 5, they remain in the position arrived at and in this position they accomplish the return stroke. Arriving at the second inversion .point of the running sense, instead of effecting the return stroke, as the profile of the cam 5 would allow and as the spring 41 would effect, they remain in their position because of the engagement created between the sector 44 and the hook 45 biased by the spring connected to its pin 49 and not opposed by the action of the products on the arm 50. Thus the successive runs or strokes until the arrival of the products, are effected by the coaxial shafts with their rotation blocked, in which position the pusher has the active arm raised from the plate 51.

At the arrival of products at the plate 51, and with the action of these on the arm 50, the rotation of the coaxial shafts is unblocked and thus the pusher returns to its working position (forward run), effecting at the end of the forward stroke, also the rotation in order to carry out the return run raised from the plate, and effecting, at the end of the return stroke, a further rotation for the return in the working position, this if in the meantime another product has been placed on the plate in such a position that it impedes the reciprocal engagement between hook and sector.

As mentioned above the intermittent motion of the tape conveyor is, preferably, so synchronized with the feeding device that the unblocking action is carried out e.g. during the return stroke of the pusher in raised position.

If on the other hand the wrapping machine and the feeder have to operate with products requiring a tuft the U supports 60, 61 are fixed at the extremities of both the coaxial shafts 16, 22 together with the relative seizing blocks. According to the conformation of the supports of the blocks 57, 58 the band 52 is positioned such that the products arrive on the plate 51 at the seizing blocks 57, 58 when the feeder is in the position immediately before the beginning of the working run.

In this second case, in which the condition still applies that if a product does not press the arm 50,-the feeder continues to travel in the upwardly rotated position, that is disengaged from the zone of the plate 51, the feeder works as follows: under the thrust of the band 52 a product 59 is carried towards the end of the plate 51 and pushed against the arm 50 in the desired moment and it impedes the blocking of the rotation of the pair of coaxial shafts. In this position it is seized by the two seizing blocks 57, 58 the one joined to the hollow shaft 6 16 and the other to the cylindrical shaft 22 coaxial to the former.

In fact on rotating the cams 3 and 4, and because of the shape of the configuration of the cam slot of these, a relative sliding between the two shafts 16 and 22 is determined in the sense of bringing the one block near to the other block so that they can seize the product slightly pressing it between themselves, after which they run together until they carry the seized product outside the plate, then they revolve and the product is carried towards the gripping elements 62 of the wrapping machine which grips it with its formed surfaces.

After the seizing of the boero by the gripping elements 62 of the wrapping machine the two cams 3 and 4 determine the slackening of the seizing action of the blocks 57, 58 and then the elements 62 are lifted, together with the boom. Since the elements 62 are offset with respect to the axis of the shaft :16 and 22, noninterference occurs during the operation of these members.

The return of the seizing blocks 57, 58 to the plate 51, can then take place. As already said the rotation in the initial position of the blocks 57, 58 can take place only if in the meantime another product has arrived in the correct position and has actuated the arm 50.

The invention as conceived is susceptible to numerous modifications within the field of the inventive concept. Thus for example the rectilinear reciprocating motion of the shafts, instead of with cams, levers and connecting rods, can be imparted by cams positioned horizontally.

Further, the pusher instead of being of simple right angle form and having a recess to allow free movement of the arm 50 of the blocking device, can be of double right angled shape.

In a further variation the plate 51 at which the feeder works, can have lateral guides in order to impede disalignment of the products. The guides may define a flored entrance.

In practice the feeder can be constructed of any size, of any shape and of different materials. In addition all the detailed elements can be substituted by others technically equivalent.

I claim:

1. A feeding device for feeding shaped products to a wrapping machine, which comprises a frame, a hollow shaft supported axially slidable and rotatable on said frame, a telescoping shaft slidable within said hollow shaft and coaxial therewith, said telescoping shaft extending beyond the ends of said hollow shaft, a first connecting assembly fixed on said hollow shaft, a second connecting assembly fixed on said telescoping shaft at a portion thereof outside said hollow shaft, a driving shaft spaced from said hollow shaft and supported on said frame, a first bilaterally acting cam means, a second bilaterally acting cam means and a unilaterally acting cam means, all said cam means being fixed on said driving shaft, first kinematic chain means having on one end thereof a follower member bilaterally guided by said first cam means and on the other end thereof a member articulated to said first connecting assembly, a second kinematic chain means having on one end the-reof a follower member bilaterally engaged by said second cam means and on the other end thereof a member articulated to said second connecting assembly, said first and second cam means when rotated by said driving shaft, imparting through said first and second kinematic chains an axial reciprocating motion to said hollow and said telescoping shafts, a first sleeve member coaxial with said telescoping shaft and rotatably supported on said frame near one end of said telescoping shaft, said first sleeve member having a radially projecting portion, a second sleeve member coaxial with said first sleeve member and rotatably supported on said frame at a distance from said first sleeve member, a rod member fixed on said first and said second sleeve member and extending parallel .to said hollow and said telescoping shaft at a distance therefrom, said rod member sl-ida-b'ly engaging said first and said second connecting assembly and allowing a relative movement between said rod memher and said connecting assemblies in the direction parallel to said hollow and said telescoping shafts and preventing relative movements therebetween in the direction transverse to said rod member, a third kinematic chain means having at one end thereof a unilateral follower member unilaterally guided by said unilaterally acting cam means and having at the other end thereof a member articulated to said radially projecting portion of said first sleeve member, spring means connected with one end thereof to said frame and with the other end thereof to said unilateral follower member and resiliently urging said unilateral follower member against said unilaterally acting cam means, said unilaterally acting cam means, when rotated by said drivingshaft, imparting through said third kinematic chain means a rotatory motion to said first sleeve member and there-through to the group including said rod member, said second sleeve member, said hollow shaft and said telescoping shaft; a first gripping means fixed on an end of said hollow shaft and a second gripping means fixed on the end of said telescoping shaft'nearest to said first gripping means, stop means rigid with said second sleeve member, a pawl member normally engaging said stop means to prevent rotation of said sleeve member and, through said rod member, of said hollow and telescoping shafts in an angular position thereof in which said unilateral follower member is at the maximum distance from the axis of rotation of said unilaterally acting cam means, lever means connected with said pawl member, conveyor means for the products to be fed, said conveyor means defining a path for said products, said lever means having an arm reaching into the path of said products and adapted to disengage said pawl from said stop means when one of said products is urged by said conveyor means against said arm [thereby allowing rotation of said gripping means, said path extending between said first and said second gripping means thereby allowing said gripping means to engage and entrain said products.

2. A device according to claim 1, wherein said first and second connecting assemblies are adjustable bushlock members.

3. A device according to claim 1, wherein said hollow and said telescoping shafts project overhanging from said frame with the ends thereof carrying said gripping means and said conveyor means is arranged outside said frame within the reach of said gripping means.

References Cited by the Examiner UNITED STATES PATENTS 5/1933 Crosbie 214147 1/1963 Seidel 214l

Claims (1)

1. A FEEDING DEVICE FOR FEEDING SHAPED PRODUCTS TO A WRAPPING MACHINE, WHICH COMPRISES A FRAME, A HOLLOW SHAFT SUPPORTED AXIALLY SLIDABLE AND ROTATABLE ON SAID FRAME, A TELESCOPING SHAFT SLIDABLE WITHIN SAID HOLLOW SHAFT AND COAXIAL THEREWITH, SAID TELESCOPING SHAFT EXTENDING BEYOND THE ENDS OF SAID HOLLOW SHAFT, A FIRST CONNECTING ASSEMBLY FIXED ON SAID HOLLOW SHAFT, A SECOND CONNECTING ASSEMBLY FIXED ON SAID TELESCOPING SHAFT AT A PORTION THEREOF OUTSIDE SAID HOLLOW SHAFT, A DRIVING SHAFT SPACED FROM SAID HOLLOW SHAFT AND SUPPORTED ON SAID FRAME, A FIRST BILATERALLY ACTING CAM MEANS, A SECOND BILATERALLY ACTING CAM MEANS AND A UNILATERALLY ACTING CAM MEANS, ALL SAID CAM MEANS BEING FIXED ON SAID DRIVING SHAFT, FIRST KINEMATIC CHAIN MEANS HAVING ON ONE END THEREOF A FOLLOWER MEMBER BILATERALLY GUIDED BY SAID FIRST CAM MEANS AND ON THE OTHER END THEREOF A MEMBER ARTICULATED TO SAID FIRST CONNECTING ASSEMBLY, A SECOND KINEMATIC CHAIN MEANS HAVING ON ONE END THEREOF A FOLLOWER MEMBER BILATERALLY ENGAGED BY SAID SECOND CAM MEANS AND ON THE OTHER END THEREOF A MEMBER ARTICULATED TO SAID SECOND CONNECTING ASSEMBLY, SAID FIRST AND SECOND CAM MEANS WHEN ROTATED BY SAID DRIVING SHAFT, IMPARTING THROUGH SAID FIRST AND SECOND KINEMATIC CHAINS AN AXIAL RECIPROCATING MOTION TO SAID HOLLOW AND SAID TELESCOPING SHAFTS, A FIRST SLEEVE MEMBER COAXIAL WITH SAID TELESCOPING SHAFT AND ROTATABLY SUPPORTED ON SAID FRAME NEAR ONE END OF SAID TELESCOPING SHAFT, SAID FIRST SLEEVE MEMBER HAVING A RADIALLY PROJECTING PORTION, A SECOND SLEEVE MEMEBR COAXIAL WITH SAID FIRST SLEEVE MEMBER AND ROTATABLY SUPPORTED ON SAID FRAME AT A DISTANCE FROM SAID FIRST SLEEVE MEMBER, A ROD MEMBER FIXED ON SAID FIRST AND SAID SECOND SLEEVE MEMBER AND EXTENDING PARALLEL TO SAID HOLLOW AND SAID TELESCOPING SHAFT AT A DISTANCE THEREFROM, SAID ROD MEMBER SLIDABLY ENGAGING SAID FIRST AND SAID SECOND CONNECTING ASSEMBLY AND ALLOWING A RELATIVE MOVEMENT BETWEEN SAID ROD MEMBER AND SAID CONNECTING ASSEMBLIES IN THE DIRECTION PARALLEL TO SAID HOLLOW AND SAID TELESCOPING SHAFTS AND PREVENTING RELATIVE MOVEMENTS THEREBETWEEN IN THE DIRECTION TRANSVERSE TO SAID ROD MEMBER, A THIRD KINEMATIC CHAIN MEANS HAVING AT ONE END THEREOF A UNILATERAL FOLLOWER MEMBER UNILATERALLY GUIDED BY SAID UNILATERALLY ACTING CAM MEANS AND HAVING AT THE OTHER END THEREOF A MEMBER ARTICULATED TO SAID RADIALLY PROJECTING PORTION OF SAID FIRST SLEEVE MEMBER, SPRING MEANS CONNECTED WITH

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