US 2237641 A
Description (OCR text may contain errors)
April 8, 1941- w. VON HOFE 2.237.641
CONTROLLING MEANS FOR ADHESIVE APPLYING APPARATUS Filed June 26, 1940 2 Sheets-Sheet 1 INVENTOR. GEORGE W vo/v Hons:
A TTO/P/VE Y April 8; 1941. G. w. VON HOFE 2.231641 CONTROLLING MEANS FOR ADHESIVE APPLYING APFARATUS Filed June 26, 1940 2 Sheets-Sheet 2 INVENTOR. 650862 14 vo/v flora MWM , i atented Apr. 8, 1941 CONTROLLING Means non Annnsrva APPLYING arrana'rns George W. von Hol'e, Bound lflroolr, bi. it." assignor to New Jersey Machine Corporation, Iiohcken, N. .L, a corporation 01! New Jersey Application June 2d, 1944i, Serial No. ttt/ltll (hi. ti -lit) v Claims.
The invention relates to adhesive applying apparatus and more particularly to apparatus ior applying adhesive to labels in labeling machines and has for its object to provide a novel controlling means for such apparatus whereby the application of adhesive to the labels or their equivalent is effected in a simple and efficient manner. The invention contemplates further the provision of a novel controlling means whereby the application of adhesive is controlled in dependenceupon the presence of a label in correct and predetermined applying position on the label carrying means. Other objects will appear from the description hereinafter and the i'eatures of novelty will be pointedout in the claims.
in the accompanying drawings which illustrate an example of the invention without defining its limits, Fig. l is a fragmentary elevation, partly in section, of a labeling machine with the novel controlling means embodied therein; Fig. 2 is a iront elevation of-the adhesive applying apparatus and its novel controlling means; Fig. 3 is a detail view or said controlling means as it ap pears in big. 1, with the parts in different positions, and Fig. 4 is a detail horizontal section on an enlarged scale on the line 4-4 of Fig. 2.
l or purposes of illustration and description and without intent to define the limits of the invention, the novel controlling means for adhesive. applying apparatus is shown as embodied in a labeling machine 01' the type disclosed in tlifiigwltpielbaum Patent No. 1,711,257 of April 30,
The type of labeling machine illustrated in the drawings includes a transfer carriage l slidably mounted on guideways H suitably fixed on the irame of the machine. Asuction head I2 is adjustably supported on the carriage l0 and is reciprocated thereby between a label pick-up station at which a supply stack of labels I3 is located in a container M, and a label applying station at which a support [5 for the article A to be labeled is mounted in any convenient way. Suitable means is provided for enabling the suction head it to pick up terminal labels l3 from the upper end of the supply stack at the label plclr-up station and for adjusting said suction head it on the carriage ill at the label applying station to apply the carried labels to the articles on the support iii. During the travel from the label pick-41p station to the label applying staea]. the label It carried by the suction head 12 in correct applying position at the time, receives hereinbefore.
an application of adhesive from a suitable adhesive applying apparatus.
The latter in the illustrated example, consists of an adhesive applying roller l't in tangential receiving relation to or contact with an adhesive distributing roller ll which dips into a supply oisuitable adhesive contained in a receptacle It supported in any convenient manner on a bed plate i9 forming part of the frame of the machine;
The distributing roller ii is fixed upon a shaft it which is rotatably mounted in bearing brackets ii projecting upwardly from the bed plate it, while the applying roller it is carried by a shaft ii journalled in bearing blocks ii movably mounted in guideways it provided in levers iii pivoted on the shaft 2H; for the purpose of yieldingly maintaining the roller it in adhesive receiving relation or contact with the roller ll, springs it may be located between the bearing blocks 23 and the end portions oi the levers 2b. The latter are connected by a crossrod 2i and each has a lug it movable between stop screws it mounted in ears forming in tegral parts of the bearing brackets it.
. The novel controlling means for the adhesive apparatus comprises a main operating rod it having its upper end pivotally connected at 32 with the cross-rod ill and provided at its lower 1 end with aforked member 32 which slidably straddles a driving or power shaft 33 included in the labeling machine, said shaft it being actuated in any suitable manner as shown for instance in the Apfelbaum patent referred to A roller it is mounted on the forked member 32 in rolling engagement with a sultable cam 35 fixed upon the shaft 33, said cam 35 in cooperation with the roller 3t controlling the operation of the rod ill in a manner to adjust the adhesive'applying roller it to and from its operative position-in the normal operation of the machine. The operating rod it carries a collar 36 adjustably lined in place by a set screw 36 and from which a lug 3ft projects into opera-- tive relation with a locking member at for the purpose to be more fully set forth hereinafter. Thelocking member St at its free end terminates in a locking nose ill arranged to cooperate with said lug ill to lockthe rod 3i and prevent it from shifting the adhesive applying roller it to its operative position if no label has been picked up by the suction head it or a label is incorrectly positioned thereon; the locking member 38 depends from a sleeve W of which it preferably forms an integral part, said sleeve Ml being rotatably mounted on a pivot pin 4I projecting from a bracket 42 secured to and extending down- .wardly from'the bed plate I9. A valve arm 43 preferably also forming an integral part of the sleeve 46 extends'therefrom in a substantially horizontal direction and at its free end carries a valve 44 preferably mounted on the arm 43 so as to be adjustable relatively thereto. The valve 44 is arranged to control the vacuum opening of a suitably supported valve casing 45 which is connected preferably by means of a flexible tube 46 with a conventional source of suction such as a vacuum pump; in addition the valve casing 46 is connected by means of a preferably flexible tube 41 with the preferably mentioned suction head I2. A spring 48 has its one end secured to the outer end of the arm 43 and its other end connected with a screwthreaded hook 49 adjustably mounted on the bed plate I9 by means of a nut 56 and a lock nut The spring 48 acts to normally maintain the valve 44 in an open position and to return it thereto as will aptpear more fully from the description hereinaf er.
The novel controlling means further comprises an auxiliary operating rod 52 located in spaced parallel relation to the main operating rod 3| with its lower end slidably straddling the shaft 33 and carrying a roller 53; the latter is in rolling engagement with a suitable cam 54 secured upon the shaft 33 to rotate therewith. At its upper end the auxiliary rod 52 carries a bracket 55 in slidable engagement with the main rod 3I for guiding the auxiliary rod 52 in its vertical movements. A spring 56 has its one end secured at 51 to a collar 58 adjustably fixed upon the main operating rod 3| and its other end fastened at 59 to the auxiliary operating rod 52; the spring 56 serves to yieldingly maintain the rollers 34 and 53 in rolling engagement with the respective earns 35 and 54 and to otherwise act on said rods 3| and 52 as will be pointed out more fully hereinafter. The bracket 55 includes an upright arm 60 from which transverse members 6i and 62 project in horizontal directions above and below the valve arm 43 respectively, in spaced relation thereto. The members 6| and 62 carry adjustable projections in the form of screws '63 and 64 respectively located in vertical registry with said arm 43.
In the operation of the labeling machine referred to herein the carriage III is reciprocated on the guideways II by suitable mechanism as disclosed for instance in the Apfelbaum Patent No. 1,711,257 to shift the suction head l2 from the label pick-up station to the label applying station, and back again. At the label pick-up station provision is made, for instance, by
periodically elevating the stack of labels I3, to
cause the suction head I2 to pick-up successive terminal labels I3 from said stack and to transfer the carried labels to the applying station. During the travel from the pick-up station toward the applying station; the label I3 carried by the suction head I2 passes in tangential contact with the adhesive applying roller I6 and receives an application of adhesive therefrom. When the applying station is reached, the carried label I3 is deposited on the article A on the support, for instance by moving the suction head I2 downwardly on the carriage I0. During these operative steps the suction in the suction head I2 is controlled in operative synchronism therewith to eiiect the desired results. In Fig. 1 the carriage I9 is at that stage in the operative cycle at which the label I3 carried by the suction head I2 is about to be adhesively applied to the article A on the support I5. In proper timing with this application of the label I3 to the article A the cam 54 in co-operation'with the roller 53 and spring 56 raises the auxiliary rod 52 which carries with it the bracket 55 and causes the screw 64 thereof to engage and swing the valve arm 43 in a direction to shift the valve 44 away from the valve casing 45 to open the vacuum opening thereof. The suction in the suction head I2 is thus relieved to release the particular label I3 and thereafter the suction head I2 is returned to the raised position on the carriage III shown in Fig. 1.
The carriage I0 is then shifted to the left on the guideways II to return the suction head I2 to the pick-up station ready to remove the next successive terminal label I3 from the stack thereat. In proper synchronism with this movement of the carriage II] to the left in Fig. 1, the cam 35 acting on the roller 34 raises the main operat ing rod 35 and thereby rocks the levers 25 on the shaft 20 in a direction to shift the adhesive applying roller l6 to an inoperative position below the path of travel of the active face of the suction head I2; the latter accordingly does not contact with the roller I6 and therefore is not covered or soiled with adhesive during this movement. At the same time the locking member 38 is actuated to swing its locking nose 39 beneath the lug 31 of the collar 36 fixed upon the main rod 3|. At this stage the parts of the controlling means are in the positions illustrated in Fig. 3 and the main rod 3| is held against downward movement and the adhesive applying roller I6 is temporarily locked in its inoperative position.
As the operative cycle proceeds. the auxiliary operating rod 52 is moved downwardly by the action of the cam 54 on the roller 53 and carries with it the bracket 55 which is slidably shifted in a downward direction on the main operating rod 3|. The screw 63 movable with the bracket 55 is thereby caused to engage and rock the valve arm 43 and to shift the valve 44 against the tension of the spring 48 into engagement with the casing 45 to close the vacuum opening thereof whereby suction is again developed in the suction head I2. The aforesaid movement of the valve arm 43 rocks the sleeve 40 on the pivot pin 4| to concurrently actuate the locking member 38 in a direction to shift the locking nose 39 to its inoperative position out of the path of the lug 31 carried by the main operating rod 3 I During these operations, the terminal label I3 of the supply stack and the suction head I2 are brought into surface engagement with each other. If this surface engagement is such as to correctly position said terminal label I3 on the active surface of said suction head I2, a vacuum will be developed in the suction line and the valve 44 will be held in its closed position by atmospheric pressure, even though the auxiliary rod 52 moves upward to permit said valve 44 normally to be opened by the spring 48.
With the lock ng nose 39 in its operative posit on the cam 35 and roller 34 in co-operation with the spring 56, the main operating rod 3| will be pulled downwardly and the levers 25 will be pivotallv actuated to shift the adhesive applyin roll I6 to the operative position shown in Fig. 1. In continuing the operative cycle, the carria e I0 moves toward the right in Fig. 1 along the guideways II from the pick-up station to the label applying station, the label l3 held in place pick-up station to pick-up the next succeeding terminal label ill from the top of the supply staclr.
If the label it as it is picked up by the suction head it is incorrectly positioned thereon or no label it is picked up from the supply stack, air will lealr through the uncovered holes in the suction head it and reduce the effect of the" vacuum on the inner face of the valve N and permit the spring it to open said valve 4E due to the lost motion between the arm 03 and the screw til. movement under the influence of the cam ti l will next slidaloly move the bracket 5% along the mainrod ti in a corresponding upward direction, and at the same time will actuate the arm.
ll and member "it in a manner to shift thenose oi the locking member 33 into the path of the lug At this stage the parts of the controlling means are in the positions illustrated in Fig. 3 in which the lug 3i occupies a raised position and the adhesive applying roller 16 is concurrently in its inoperative position. As the main The auxiliary rod 52 in its upward assigtii operating rod 3i starts downwardly in the further operation oi? the mechanism, the lug ill will engage the locking nose 3t and lock the main rod it against further downward movement to thereby prevent theadhesive applying roller it from being shifted to its operative position at the label line.
its a result, the suction it with the incorrectly positioned label it thereon or with no label in place on its active surface, will not engage the adhesive applying roller i6 and consequently will not be contaminated or soiled with adhesive therefrom. As soon as the suction head it in the continued operation of the machine thereafter piclrs up a label it at the label pick-up station in proper position on its active surface, the controlling means will automatically resume its normal operation and will continue to so operate until another label it! is improperly posi tioned on the suction head It or no label is picked up thereby. l u
- During an operative period of the machine, the lug fill in co-operation with the stop screws 23 serves to arrest the rocking movements of the levers lb and to insure the correct location oi"- the adhesive applying roller IS in its recurrent operative position.
From the aforesaid description it will beclear that the controlling means controls the adhesive applying means in a manner to insure applications oi adhesive only to labels properly positioned on the suction head, and to definitely prevent the application oi adhesive to the active lace of the suction head if it has failed, for some reason, to pick up a label at the pick-up station.
The novel controlling means is simple in construction and efficient in operation and requires no particular supervision at. any time. The said controlling means is capable of being installed in existing labeling machines without material difficulty.
Various changes in the specific forms shown and described may be made within the scope of the claims without departing from the spirit of the invention.
i. In an adhesive applying apparatus including pivotally mounted levers, and an adhesive applying roller rotatably mounted on said levers, that improvement which comprises a suction line having a vacuum opening, a main operating rod connected with said'levers, acam-whereby said main operating rod is actuated to rock said levers and adjust said adhesive applying roller from an inoperative to an operative position and vice versa, a valve for controlling said vacuum opening to render the suction effective and nonedective to develop a vacuum in said suction line in dependence upon the position of said valve, a pivoted valve arm carrying said valve, a spring for normally maintaining said valve in its open position and for returning it thereto, an auxiliary operating rod, a cam for reciprocating said auxiliary rod vertically, projections movable with saidauxiliary rod and acting on said valve arm to initially close said valve and to open the same, said valve being held inits closed-position independently of said auxiliary rod and its projections by atmospheric pressure when a vacuum exists in said suction line, a
locking member movable with said valve arm,
and a locking lug carried by said main operating rod for engagement by said locking member when said valve is in its open position to thereby lock said main rod against operation and maintain said adhesive applying roller in its inoperative position. v
2. In an adhesive applying apparatus including. pivotally mounted levers, and an adhesive applying roller rotatably mounted onsaid levers, that improvement which comprises a suction line having a vacuum opening, a main operatina rod connected with said levers, means whereby said main operating rod is actuated to roclr said levers and adjust said adhesive applying roller from an inoperative to an operative position and vice versa, a valve for controlling said vacuum opening to render said. suction effective and noneffective to develop a vacuum in said suction line in dependence upon the position oi said valve, a movable valve arm carrying said valve, a spring for normally maintaining said valve in its open position and for rettuning it thereto, auxiliary means co-operating with said valve arm for initially closing said valve and for opening the same,said valve being heldin its closed'positlon independently of said co-operating means by atmospheric pressure when a vacuum exists in said suction line, a locking member movable with said valve arm, and a locking lug carried by said main operating rod for engagement by said locking member when said valve is in its open position to thereby loclr said main rod against operation and maintain said adhesive applying roller in its inoperative position.
3. in an adhesive applying apparatus includan operative position and vice versa,a valve for.
controlling said vacuum opening to render the suction eifective and non effective to develop a vacuum in said suction line in dependence upon the position of said valve, auxiliary operating means for initially closing said valve and.- for opening the same, said valve being held in its closed position independently of said. auxiliary operating means by atmospheric pressure when a vacuum exists in said suction line, and locking means controlled by said valve whereby said main operating means is prevented from adjusting said adhesive applying roller to its operative position to thereby maintain said roller in its inoperative position.
4. In an adhesive applying apparatus including pivotally mounted levers, and an adhesive applying roller rotatably mounted on said levers, that improvement which comprises a suction line having a vacuum opening, operating means for pivotally rocking said leversv to adjust said adhesive applying roller from an inoperative to an operative position and vice versa, a valve for controlling said vacuum opening to render the suction effective and non-effective to develop a vacuum in said suction line in dependence upon the position of said valve, the latter being held in its closed position by atmospheric pressure when a vacuum exists in said suction line, a spring for opening said valve when no vacuum exists in said suction line, and locking means controlled by said valve whereby said operating means is locked against operation to thereby maintain said adhesive applying roller in its inoperative position.
5. In an adhesive applying apparatus including an adhesive applying roller movable from an inoperative to an operative position and vice versa, that improvementwhich comprises a suction line, a valve controlling said suction line to render the suction effective and non-effective to develop a vacuum therein, operating means for shifting said adhesive applying roller to its operative position and to its inoperative position, and locking means controlled by said valve for looking said operating means against operation when no vacuum exists in said suction line to thereby maintain said adhesive applying roller in its inoperative position.
6. In a labeling machine including means for supporting a supply stack of labels, means for supporting articles to be labeled, a suction transfer head for removing terminal labels from said stack and depositing said labels on said articles, and adhesive applying means for applying adhesive to said labels during transfer from the supply stack to the articles, said adhesive applying means being movable from. an inoperative to an operative position and vice versa, that improvement which comprises a suction line connected with the suction head and provided with I a vacuum opening, the development of a vacuum" in said suction line being dependent upon the presence of a label on said suction head, operating means for shifting said adhesive applying means to its operative position, a valve for controlling saidvacuum opening and held in its closed position by atmospheric pressure when a vacuum exists in said suction line, and locking means movable with said valve whereby said operating means is prevented from'shifting said adhesive applying means from its inoperative to its operative position when said valve occupies its open position because of the non-existence of a vacuum in said suction line due to the absence of a label on said suction head.
7. In an adhesive applying apparatus including an adhesive applying roller movable from an inoperative to an operative position and vice versa, that improvement which comprises a suction line, a valve controlling said suction line to render the suction effective and non-efiective to develop a vacuum therein, operating means for shifting said adhesive applying roller to its operative position and to its inoperative position, and mechanical locking means controlled by the existence or non-existence of a vacuum in said suction line and serving to lock said operating means aga nst operation when no vacuum exists in the suction line to thereby maintain said adhesive applying roller in its inoperative position.
GEORGE W. VON HOFE.