Патент USA US2137656код для вставки
Nov. 22, 1938. A, G.’ ROSE 2,137,656 WRAPPING MACHINE Filed Sept‘, 7, 1937 » 265 2 Sheets-Sheet 1 15 A wMI/I/G/ 177087711024 VWWM/ £22213, Nov. 22, 1938. A. G. ROSE ' Y ‘ 2,137,656‘ WRAPPING MACHINE Filed Sept. 7,. 1937 129.2. - 2 Sheets-Sheet 2 Patented Nov. 22, 1938 2,137,656 UNITED STATES ' PATENT OFFI€E 2,137,656 WRAPPING MACHINE Alfred German Rose, Gainsborough, England, as signor to Rose Brothers (Gainsborough) Lim ited, Gainsborough, England, a British com Dally Application September 7, 1937, Serial No. 162,808 In Great Britain September 14, 1936 8 Claims. This invention relates to wrapping machines of the type comprising a rotatable pocket-wheel provided with a plurality of receiving pockets and movable intermittently to carry each pocket 5 in turn up to a succession of stations at which the various operations involved in enclosing an article in a wrapper are effected. Usually in this type of machine when any one of the wheel pockets is brought temporarily to 10 one of the stations, hereinafter referred to as the feed station, an article and wrapper are pushed into the pocket and by this movement the sides of the pocket fold the wrapper on to three sides of the article. Two ?at portions of the " wrapper extend outwardly from the pocket and a 2 (01. 93—7) jaws to an extent determined by the setting of the cam. The machine may include striker mechanism operable on the toggle linkages associated with the wheel pockets periodically to open the grip per jaws, said mechanism being actuated by means (for example push rods, the effective lengths of which may be varied) which are ad justable to vary the timing of‘ the strikers to compensate for any variation effected in the minimum separation between the jaws of the pockets. An example of the invention, as applied to a wrapping machine adapted for wrapping sweet meats, will now be described with reference to 15 portion of the wrapper projects sideways beyond the accompanying drawings, in which: each end of the article. Folding means serve to fold the two ?at portions of the wrapper one after the other on to the outer and hitherto uncovered side of the article. After each pocket with the article and wrapper held therein has been carried from the feed station, means is provided at a succeeding station to fold or grip and twist the Figures 1 and 2 are elevations at right-angles to each other showing those portions of the ma chine in which the invention is embodied. sizes of which vary within given limits and also The drawings are to some extent diagrammatic and in each certain parts have been omitted for the sake of clearness. The machine illustrated is of known type com prising a rotatable pocket wheel ll} mounted for intermittent rotational movement about a hori~ 25 zontal axis l I. The pocket-Wheel is provided with peripheral receiving pockets l2 each of which is constituted by a pair of relatively movable jaws l3, M. In the present example there are four pockets arranged at equally spaced angular in 30 tervals, and the pocket-wheel is so driven (by articles of a very fragile or delicate nature such as chocolates or sweetmeats having soft centres. According to this invention a wrapping ma 35 chine of the type referred to is characterized by the provision of a single control means com mon to the several pockets of the pocket-wheel known mechanism, not illustrated) as to move through one quarter of a revolution at each step. The sweetmeats to be Wrapped are fed, for ex~ ample by hand, into recesses [5 arranged in a 35 circumferential series around a circular hori zontal plate [6 which is rotatable about a ver and operable at will to vary, simultaneously in all the pockets, the receiving capacity of each. 40 In one construction according to the invention each of the wheel pockets comprises a pair of relatively movable gripper jaws interconnected by a toggle linkage, and the aforesaid single con the rotation of the pocket-wheel in such manner as to bring each of the recesses E5 in succession 40 into a position beneath the pocket wheel and portions of the wrapper extending sideways be 25 yond the ends of the article and ?nally the com pletely wrapped article is ejected from its pocket. An object of the present invention is to pro vide an improved wrapping machine of the type referred to, which is adapted to Wrap articles 30 such as sweetmeats or the like, the shapes and trol means comprises a cam which is angularly tical axis step by step in timed sequence with in register with the pocket temporarily arrested at the feed station 1. e. vertically below the axis of the pocket-wheel. The mechanism for feed adjustable with respect to the pocket-wheel about ing the sweetmeats one at a time from the plate 45 the axis of rotation of the latter and which is ar ranged to operate simultaneously on the toggle linkages associated with the several pockets to l6 into the pocket-wheel is of known type and comprises a vertically reciprocatable pusher ll which operates, in timed sequence with the pock effect an adjustment in the minimum separa tion between the jaws of each pocket. The ma chine may include spring means bearing on the et-wheel, to lift each sweetmeat Hi from the re cess IS in the feed plate I6 and force it into one 50 of the wheel pockets.‘ toggle linkage and tending to move the pocket The wrappers are constituted by successive jaws towards one another, and a follower on the portions in the length of a continuous strip 69 linkage engaging the angularly adjustable cam to limit the degree of approach of the pocket traversed intermittently past the feed station between the pocket Wheel and the feed plate i6. 55 2 2,137,656 Cutter mechanism 20 operates, in timed sequence with the pocket-wheel, to sever the leading por tion of the wrapper strip 19 at about the same instant as the sweetmeat IS in its upward travel meets the paper. A transfer ?nger 2| is ar ranged to engage the upper surface of the wrap per over the sweetmeat so that during upward travel of the pusher, the sweetmeat and its wrap per are gripped between the transfer ?nger and the upper end of the pusher. During further up ward movement of the pusher the sweetmeat and its wrapper are carried through a stationary guide ‘22 and into the wheel pocket, during which movement the wrapper is folded about two sides During step by step rotational 15 of the sweetmeat. movement of the pocket-wheel the remaining folding operations, comprising the folding of the wrapper onto the exposed front side of the sweet meat, and the closing of the end portions of the 20 wrapper by twisting or folding, are carried out in known manner and the completely wrapped sweetmeat is ?nally ejected from the pocket wheel at an ejection station 23, at which each pocket is arrested immediately before it proceeds 25 to the feed station. The jaws i3, M, constituting each pocket are carried on the outer ends of two arms 24, 25 which are pivotally mounted at their inner ends on the pocket-wheel. . Each jaw is on a screw The normal opening and closing movements of the pocket jaws during the operation of the ma— chine are effected by striking mechanism ar ranged in the following manner. When a pocket arrives at the feed station, a striker 46 carried on a lever 4i pivotally mounted at 42 is operated 'to engage the outer end of the sliding block 28 associated with the downwardly directed pocket and to push this block inwardly, thus opening the pocket jaws in readiness to receive the sweet 10 meat and its wrapper which at this stage are under the control of the ascending pusher fl and the transfer ?nger 2|. The striker (it is then actuated to disengage the sliding block and permit the jaws to approach and grip the sweet 15 meat, and preferably this action is so timed that the disengagement of the sliding block takes place slightly before the pusher has reached its upper most position. In this way there is obtained a stroking action of the jaws upon the wrapper 20 tending to pull the latter tightly over the top and around two opposite sides of the sweetmeat. At the ejection station 23 the pocket jaWs are opened to release the article by a second striker 43 which is operated to engage the sliding block 25 29 appropriate to the pocket at the ejection sta tion and to move this block inwardly to open the pocket jaws. Since a variation in the minimum separation between the pocket jaws, by angular _ setting of each jaw in relation to its supporting arm may be adjusted, and after adjustment, locked in position. The arms 26, 25 appropriate adjustment of the control plate 32 will change 30 the position of the associated sliding blocks 29 in relation to the strikers 40, 43, it is necessary, after each adjustment as aforesaid, to retime the to each pocket are interconnected by a single strikers. 30 threaded stem 2% by means of which the initial For this purpose the strikers are oper 35 toggle linkage 2T, 28, the pivotal connection be ated, by push rods 44, 45 the effective lengths of 35 tween the links carrying a block 2?.‘ which is slid able in a radial guide slot 39 in the pocket-wheel. A coiled compression spring 3i is located between the inner end of the sliding block 29 and the 40 inner end of the guide slot 35 and tends to force the sliding block outwardly and thus to draw the two jaws of the pocket towards one another which are adjustable to enable the necessary al teration in timing to be effected. The push rods are coupled to rocking levers 45, 15'! which in turn are coupled to eccentric straps 48, 49 driven in 40 timed sequence with the pocket-wheel. By means of the pocket-wheel construction according to this invention any size of article within a given range may be dealt with and the necessary adjustment of the pockets is simulta neously effected by means of the controlling plate to an extent which may be determined by pre senting an article to one of the pockets when the latter is in the closed position. through the intermediary of the toggle linkage. The extent to which the jaws may be forced to 45 wards one another under the action of the spring Si is controlled in the following way. An ad justing plate 32 with a peripheral ?ange 33 is mounted on the pocket-wheel coaxially with it. The inner surface of the peripheral flange 33 is 50 formed as a controlling cam surface. 55 60 65 70 Each of the sliding blocks 2% associated with the respec tive pockets of the wheel is formed with a pro jection 3L3 arranged to engage the inner surface of the ?ange 33, thereby limiting outward move ment of the block under the action of the spring. The inner surface of the peripheral ?ange com rises four operative cam surfaces 35 extending circumferentially of the control plate, one cam surface for each pocket. As shown in Figure 1 each of the cam surfaces 35 varies progressively in its distance from the axis of rotation of the pocket-wheel, so that by rotational adjustment of the control plate 32 the minimum separation between the jaws of each of the pockets is simul~ taneously adjustable to any required extent with in a given range. The control plate 32 is adapt ed to be locked to the pocket-wheel by means of bolts 36. While the machine is operating, the control plate 32 rotates solid with the pocket wheel; when adjustment in the minimum sepa ration between the jaws of the pockets is to be made the bolts 36 are slackened, the control plate is moved angularly to the desired extent, and is then again clamped in its re-adjusted position to 75 the pocket-Wheel. I claim:-— 1. In a wrapping machine of the type described, 50 the combination of a rotatable pocket-wheel having a plurality of article-receiving pockets each of which comprises a pair of relatively mov~ able gripper jaws, and a single control means common to the several pockets and operable at will to vary, simultaneously in all the pockets the minimum separation between the elements of each pair of jaws. 2. A wrapping machine of the type described comprising a rotatable pocket-wheel having a 60 plurality of pockets each of which comprises a pair of relatively movable gripper jaws, a toggle linkage for each pocket interconnecting the jaws thereof, and a single control means common to the several pockets and operable on the toggle linkages associated therewith simultaneously to vary the minimum separation between the ele ments of each pair of pocket jaws. 3. A wrapping machine of the type described comprising a rotatable pocket-wheel having a 70 plurality of pockets each of which comprises a pair of relatively movable gripper jaws, a toggle linkage for each pocket interconnecting the jaws thereof, and a cam which is carried by the pocket wheel and angularly adjustable in respect to it 75 2,137,656 about the wheel axis and which is arranged to operate simultaneously on the toggle linkages as sociated with the several pockets to vary the minimum separation between the elements of each pair of pocket jaws. 4. A wrapping machine of the type described comprising a rotatable pocket-wheel having a plurality of pockets each of which comprises a pair of relatively movable gripper jaws, a toggle 10 linkage for each pocket interconnecting the jaws thereof, spring means bearing on each toggle linkage and tending to move the pocket jaws towards one another, a cam which is carried by the pocket-wheel and is angularly adjustable with 15 respect to it and which provides a plurality of cam surfaces one for each pocket, and a cam fol lower on each toggle linkage engaging the corre sponding cam surface on the angularly adjustable cam to limit the degree of approach of the pocket 20 jaws to an extent determined by the setting of 3 v 6. A wrapping machine as claimed in claim 2 combined with striker mechanism operable on the toggle linkages associated with the wheel pockets to open the gripper jaws for receiving an article to be wrapped and for releasing the article after wrapping has been completed. ' 7. A wrapping machine as claimed in. claim 2 combined with striker mechanism operable on the toggle linkages associated with the wheel pockets periodically to open the gripper jaws, and actuat 10 ing means for the striker mechanism which is ad justable to vary the timing of the strikers to compensate for any variation effected in the minimum separation between the jaws of the pockets. . 15 8. A wrapping machine of the type described comprising a rotatable pocket-wheel having a 5. In a wrapping machine of the type described, the combination of a pocket-wheel having a plu plurality of pockets each of which is formed by two pivotally mounted grippers movable towards and away from one another, a toggle linkage for 20 each pocket interconnecting the two grippers, a slide-block carried at the pivotal connection be tween the toggle links of each linkage and slid rality of article-receiving pockets each constituted able in a radial guide slot in the pocket-Wheel, a 25 by relatively movable jaws, spring means tend ing to effect movement of the jaws of each pocket towards one another, and control means for ad end of each radial slot and the inner end of the the cam. justably limiting the degree of approach of the pocket jaws comprising an annular cam mounted 30 on the pocket-wheel and angularly adjustable with respect thereto about the wheel axis, said cam being divided circumierentially into a plu rality of cam surfaces corresponding in number to the pockets of the wheel, the several cam sur 35 faces being of the same contour, and each vary-, ing from point to point along its circumferential path progressively in distance from the axis of - the pocket-wheel, and for each pocket a cam fol lower engaging the appropriate cam surface and control spring in compression between the inner 25 corresponding slide-block tending to force the latter radially outwards to draw the pocket jaws together, a cam plate angularly adjustable with respect to the pocket-wheel and providing a plu 30 rality of cam surfaces one for each pocket, a cam follower associated with each of the sliding blocks aforesaid and engaging the cam surface appro priate to the corresponding pocket to limit the outward movement of the block under the action 35 of its control spring, and striker mechanism oper able on the outer ends of the sliding blocks to effect the opening movements of the pocket jaws during the operation of the machine. 40 so interconnected with the corresponding pocket jaws as to limit the degree of approach of the latter to an extent determined by the angular setting of the cam. 40 ALFRED GERMAN ROSE.