US1554369A - Wrapping machine - Google Patents

Description

Se t. 22, 1925. 1,554,369.

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J. P. REMINGTON WRAPPING MACHINE Original Filed Nov. 1, 191 14 Sheets-Sheet 14 M v F MOTMW Patented Sept. 22, 1925 A UNITED STATES 1,554,369 PATENT orncs.

JOSEPH PERCY REMINGTON, OF PHILADELPHIA, PENNSYLVANIA.

WRAPPING MACHINE.

Application filed November 1, 1918, Serial No. 260,629. Renewed January 16, 1924.

T 0 all whom it may concern Be it known that I, JOSEPH PERCY REM- INGTON, acitizen of the United States, resid ing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have 1nvented certain new and useful Improve-' ments in WVrapping Machines, whereof the mechanism for applying. adhesive to the wrapping sheets at the regions corresponding to the subsequent foldsof the wrapper.

The combined-organization by which the purpose of my invention accomplished will be best understood from the drawings in which Fig. I, is a side elevation of a wrapping .machine embodying my invention.

Fig. II, is a 'plan view of the left hand end of the machine.

Fig. III, is a similar view of the middle portion of the machine.

Fig. IV, is a longitudinal section through the portion of the machine illustrated in Fig. II, and is indicated by the arrows IV-IV in the said figure.

Fig. V, is a cross sectional view through the paper feeding'and severing rolls, the plane of section being indicated by the arrows V-V in Figs. I, and IV.

Fig. VI, is a detail sectional View on line VIVI of Fig- V, showing the cam for controlling. the actuation of the severing 'knife.

Figs. VII and VIII, are further details of the mechanism along the planes indicated respectively by thev arrows VIIVII and VIII VIII in Fig. VI.

Fig. IX, is an elevation of a portion'of the machine opposite to that of Fig. 1, showing the gear connections for driving the paper feed rolls.

Fig. X, isa detail perspective view of one of the paper folding devices.

Fig. XI, is a cross sectional view through the paper nip rolls indicated by the arrows XI-XI in Figs. I, III, and XII.

Fig. XII, is a longitudinal sectional View along the plane XIIXII in Fig. III.

Fig. XIII, is a vertical cross section indicated by the arrows XIIIXIII in- Figs.

III and XII.

F ig. XIV, illustrates a detail section along the line XIVXIV in Fig. XII.

showing the method of cutting the paper into sheets of the proper size for wrapping. Figs. XXVIII and XXIX, are detail cross sectional views of the machine indicated respectively by the arrows XXVIII- XXVIII, and XXIX-XXIX, in Fig. I.

The machine comprises the side frames 1-2 which are united by a series of girts 3', and the structure thus formed serves to support the various mechanisms by the cooperation of which the wrapping process is accomplished. This supporting framework is supplemented by an extension including an end frame 5, which is united to the main frames b means of the longitudinal tie bars 66. otion is transmitted to the various co-operative mechanisms incorporated in the machine from a main longitudinal line shaft 7, having the power pulley 8, which is subject to the control of a friction '.clutch 9, operated through a bell crank lever 10, whose horizontal arm 11, is engaged by a cam 12, integrally formed with a pivoted the latter is mounted upon a shaft 22, which finds its support in the end frame 5. This belt is maintained taut by means of a slack take up in-the form of an idler roll 23, which is mounted in the end of spring pressed supporting arm 25. Side angle bars 26, 26, cooperate with the feed belt 18, in guiding the bread loaves upon the auxiliary belts 27. These, of which there are two in number, are supported upon pulleys 28, and 29', see Figs. XII, and XV. Pulleys 29, are fixed upon the shaft 21, already described and the pulleys-28, are fast upon a sleeve 30, mounted for free rotation upon a shaft 31, which is continuously driven from the main shaft 7, through a worm gear 32. In order to impart intermittent motion to the auxiliary feed belt the sleeve 30, is controlled through a pawling mechanism which includes the following elements:

Fixed upon shaft 31, directly adjacent the inner side of frame 2, is a disk 33, which carries a pivoted spring pressed pawl 35, co-opeiative with a ratchet wheel 36, secured upon the .sleeve 30. This pawl is integrally formed with an arm 37, having a roller 38, which engages with an internal. cam

edge 39, in a fixed plate 40. The pawl 35,-.

is thus active for only a portion of each revolution of the shaft 31, thereby imparting an intermittent motion to the sleeve 30, in the direction of the arrow in Fig. XII. The intermittent motion thus transmitted through the shaft 21, to the main feed belt 18, so-that the loaves are successively advanced as far as permitted by the adjustable stops 4l41. When a loaf isthus brought to rest, it is directly above an elevator which comprises a plunger 42, adapted to move vertically in the interspace between the auxiliary belts 27. Plun or 42, is centrally fixed upon a U shaped rame 43, having rolls 45, which are ided'within vertical slideways 46, forme in the side frames 1 and 2. Motion is imparted to the elevator bymeans of a pair of slotted arms 47, which are fixed upon a rock shaft 48. Said shaft is oscillated by which is fixed thereon and connected by an interposed link 50, to a crank pin 51, carried bya gear 52 (see Fig. IX). This gear is fixed upon one end of a shaft 53, which is driven by means of a worm gear 55, Fig. I) from the main shaft.

The paper feeding and severing mechanism is located at the left hand end of the machine as viewed in Fig. I, and is driven by the shaft 53, just described, which shaft carries the main feed roller 56. Thisroller co-operates with a companion roller 57',

and advancing the same to the wrapping mechanism tobe described later. The natural curl of the passing the same at a sharp angle about wheel 52, on the roller shaft 53.

derived, is also an. arm 49, (Fig. I)'

in the direction of the paper is first removed by roller 88, will be gradually drawn inward in the final package. The printing device includes a series of padded arms of which I those indicated at 61,61, have single printing faces, Whilst those marked 62, 62, have multiple faces, so that the adhesive printing is effected after the scheme of Fig. XXVIIQ These padded arms are adjustably set upon a shaft 63, which is constantly driven through a gear wheel 65, from the gear In rotating, the paddedfaces of the arms dip into the trough 66, in which an ample amount of the adhesive is constantly maintained.

Trough 66, communicates through a duct 67,

with a cup 68, adapted to receive the inverted vsupply container 69. 'In the present instance, I prefer to use melted parafline, as an adhesive and in order to keep the same in a liquefied condition, during the printing operation, an electric heating coil 70, has been provided. The upper feed roll shaft 71, journalled in slide blocks 72, vertically guided in yokes 73. Springs 75, operative upon the said slide blockstpress the roll 57, into contact with the roll 56, and a positive driving connection is effected through a gear 76, which meshes gear 52. The surface of the. upper roll 57 is interrupted as shown in Figs. II, and IV, in order to clear the adhesive prints upon the traversing paper web. Rolls56, and 57, are further functional as severing devices in cutting the web into sheets of the proper size. This severing is accomplished through a knife 77 which is carried by the roll 56, and c'o-operative with a groove 78, in the upper roll 57. As shown in Figs. IV and V, this knife is received and guided within a longitudinal groove 79, so as to be capable of movement in a radial direction under the influence of the springs 80.

57, is fixed upon a with the The action of the knife is controlled by means of cams 8181, each having a cam annulus 82, interrupted as at 86 (Fig. VI) and a supplemental segmentalplate 83, which ispivoted to the former a6 84, and adjustably set with respect thereto under the limitations of a.

slot co-operative with a clamp screw 85. At its ends, knife is provided with studs 87, the outer ends of which are reduced for the mounting of rollers 88, designed to engage I Considering the movement arrow in Fig. VI, the

by the portion 91 of the internal cam edge of annulus 82, and thereafter be maintained in this retracted position owing to the concentricity of the said edge as indicated at 87, with the inner cam edges of the seg:

ments 83. The existing conditions at this period will be best understood by reference to F VII, where it will be seen that the roller 88, is thus rendered ineffective and the control of the knife transferred to the cam segment. 83. As the rotary movement continues, the knife is still further retracted by reason.of the opposed-eccentricity of the cam edge 90, as shown in Fig. VIII. After the point of maximum retraction is reached further rotary movement causes the studs to be suddenly released from engagement with the cam edge 90, thereby permitting an instantaneous outward thrust of the knife under the influence of the springs .80, and causing the web to be positively severed. By again referring toFig. VI, it will be noted that the recession 91, in cam edge 89, permits the action just describedand in the subsequent further rotatibn' of the feed roll 56, the knife will be restored to the control of the annulus 82, effective upon rolls 88, as already understood.

The knife edge is preferably serated as shown in Fig. V, in order to make the out clean and positive. For a reason to be later described, it has been found advantageous,

not to completely severthe web at the cutting station, but to maintain its continuity for the time being at the points 92-92, which have been left intact as shown in.

Fig. XXVII by virtue of the notches 9893, in the severing knife (Fig. V).

As the web leaves the feed rolls, it is guided in its further traverse by channels 9-l94. which are assisted by intermediate supporting strips 95. The channels extend to a point somewhat beyond the region of constantly driven by means of a worm. gear- 99, from the main shaft "1' see Figs. I, and XL The upper set of nip rolls is fixed upon a shaft 100, which is mounted in bearing blocks 101, attached to the ends of leaf springs 102, whereby these rollers are maintained in positive contact with their fellows so as to effectively engage the web. The surface speed of the nip rolls is slightly in excess of that of the feed rolls, and as a result, the partially severed sheet is forcibly detached from the main web and fed forward toward the wrapping station at a faster rate. The forward movement of the severed sheet is limited by the stops 108, a'djustably set upon two of the supporting strips 95, see Fig. XV, so as to come to rest centrally over the loaf which is to be wrapped. The stops 103, are provided with tongue extensions 105, which serve as guards and prevent the upturning of the forward edgeso-f the sheets during their advancement. Directly after this web has been properly positioned as noted above, the loaf is raised by the elevator and engages the sheet as shown in Fig. XVII. The upper flanges of the channels 95, are cut away as at 106, to facilitate the release of the sheet.

Interposed in the path of the loaf are retaining devices in the form of curved spring plates 107, and 108. Plate 107, is attached at its upper edge to a transverse sheet metal diaphragm 109,v which extends between the side frames 1, and 2, and is rigidly fixed to brackets 110, bolted to the latter. Plate 108, is attached near its upper edge to arms 111, which are set upon a rock shaft 112. This shaft finds its bearings in the side frames 1, and 2, and is influenced by a coiled spring 113, which normally tends to maintain the arms 111, in the forward position illustrated in Fig. XVI, under the limitation of a stop 115,1 which engages a fixed pin 116. The co-o 'aeration of the springy flexible plates 1 O7 ,=.a'nd 108, not only affords a means for ":retaining and guiding the loaf in its further progress, but also serves to effect a partial envelopment by engaging the paper sheet as illustrated in Fig. XVIII. The maximum upward movement of the elevator brings the loaf upon alevel with' the table upon which the final wrapping operations are completed and subsequently directed to the discharge end of the machine. This table includes the longitudinal'side pieces 117, and the intermediate supporting plate 118, whichfare secured upon ,cross bars 119, extending between the side frames. 3

In order to prevent the ejection of the leaf under the momentum of the elevator in its upward movement. a safe guard has been provided in the'form ofa finger 120, which is spring pressed downward and pivoted at 121, to t 1e bridging girt 122. This finger is further functional in directing the loaf beneath the longitudinal. top pressure strips 123, which are secured at oneend to the under face ofthe bridging girt 122, and at the other end to a similar girt 125. These girts are capable of adjustment so that the strips 123; may be, vertically set at various positions with respect to the supporting plate 118, of the rack, to press lightclamped to the side frames 1, and

ly against the tops of the loaves as they are progressed through the substantially closed channel thus formed. After leaving this passageway, the wrapped loaves are guided. to the discharge end of the machine upon the extension having side angles 126, which are attached at one end to a cross piece 127, and at their terminal ends to the end frame 5.

Directly after the loaf has been elevated to the extent noted, the arms 111, move forward under spring pressure so that their segmental extensions 128, slip beneath the loaf as shown in Fig. XIX, whereupon theelevator begins to retract. Contemporaneous with these movements, the support of the other edge of the loafis transferred to a plate 130, which atthis time moves forward as indicated by the arrow in Fig. XIX. This plate comprises two complementary sections havin the configuration best illustrated in I ig. X, the interspace 131, serving as a clearance for the upwardly projecting portion 134, of the diaphragm 109, see Fig. XIII. Plate 130,-is secured near its rear edge to the transverse bar of a holder 132, which is U shaped and provided at guided for motion in horizontal slots 135, formed in the side frames 1, and 2. The transverse bar of the holder is pivotally attached at points 136, to the oscillating arms 137, fixed upon a rock shaft 138, which is journalled in brackets 110, .ailjustably ing motion is imparted to shaft 138, by an arm 139 (Fig. XII) fixed thereon and ad justably connected at its outer end with a reciprocating yoke piece 140, slotted as at 141, to embrace the shaft 31, so as to be guid- 142, mounted upon 140, is engaged by a operation of these parts effects a compound movement of the plat/e130, which through the greater portion of its motion assumes an acute angle with the horizontal, so that its forward edge in addition to serving as a support for the loaf is further functional in causing the depending flap to be turned under the loaf as illustrated in Figs. XIX-XX, .and there positively held after the plate has assumed its final horizontal position. In order to prevent tearing of the wrapping sheet the forward edge of plate 130, is turned downward slightly as shown at 145, in Fig. X;

Duringthese initial operations, the loaf being wrapped is held from displacement by those which have preceded, for example see Fig. XXV. In the next succeeding operation, theloaf under consideration is moved forward bya pusher 150, which has an engaging face 151, inclined to correspond means-of clamp screws 163.

its terminal ends with rollers 133, which are.

2. Rockapproximately to the side of the loaf. As best seen in Figs. III, and XII, this pusher is provided at its sides with rearward extensions 152, to afford bearings for the rollers 153, Which stabilize the pusher for horizontal motion under guidance of the slots 135, in the side frames 1, and 2, which have already been referred to. Reciprocatory motion is imparted to the pusher by links 156, which are in turn attached to arms 157, integrally formed with the levers 47, which actuate the elevator.

For the purpose of effecting the formation of the primary side folds, the engaging face of .the pusher is provided with a pair of clips, Whose arms 160, project forward and engage the wrapper in advance of the actual pushing operation. The wrapper is thereby folded as shown in Fig. XXI. These clips are L shaped and pivoted at the vertices of the angles thus formed,to brackets 161, adjustably secured within the recessed portions 162, of the pusher face by these clips occupy the position shown at the left of Fig. .XXVI, this position being maintained through the instrumentality of the leaf springs 165, under the co-operation of the stop projections 166. The obtuse angles thus formed between the arms 160, of the clips and the pusher face facilitate the initial engagement with the wrapper, and after the loaf is positively engaged in the further advance of the pusher, the loaf itself actuates the arms 167, of the clips, thereby forcing the same within the recesses 162, against the pressureof the leaf springs 165, and swinging the clips about their pivotsto the position shown at the right of Fig. XXVI. The primary side folds of the wrapper are pressed against the loaf by the arms 160,- of the clips and thus firmly held through the complete stroke of the pusher.

The manner or forming the secondary side folds of the wrapper will be best understood by reference to Figs. III, and XXIII. Fixed to the lower faces of the bridging girts 122, and 125, with capacity for independent lateral adjustment, are the twisted folding plates 170, whose function will be definitely described later. These plates extend longitudinally of the machine and serve as complementary elements with the other parts which form the guide channel for the bread loaves hereinbefore outlined. At their forward ends, plates 170, are horizontal and beyond these points they are gradually twisted through an angle of 90 degrees in relatively opposite directions and assume a final vertical position at their other ends.

Ordinarily,

Attached near the forward horizontal ends of the strips 170, are sheet metal brackets 171, (see also Fig. XXVIII), which are bowed outwardly and their return ends afi'ord attachments for the secondary folding fingers 172, which lie in vertical planes directly outside those of the active positions of the primary folding clips. The secondary side fold f, is thus lapped over the primary side fold in a manner illustrated in Figs. XXIII, and XXIV. As a result of this double folding a bottom flap f, is automatically formed and inthe further progress of the loaf, the said flaps are gradually upturned by the outside bottom plates 173, of the guide channel which are twisted after a manner similar to that described in connection with the strips 170. The character of this twisting is such as to form an easy compound curved edge 175, along which the flaps f, ride and are ultimately guided to a vertical position as best shown in Fig. XXIV. In order to prevent any buckling of the wrapper during this upturning, the secondary flap folders 172, have been extended as shown in the above figure to assist in this operation.

In addition to the flap f due to the formation of the primary and secondary side folds still another flap P, has been automatically created and this I prefer to overlap upon the flap f and accomplish by the aid of the twisted strips 170. Here again the twisting in connection with the initial shaping of these plates resulted in the formation of the easy riding compound curved edge 176, which gradually turns the final flaps f downwardly over the flaps f, during the further progress of the enveloped loaf. In .a like manner to that previously described the terminal tongue 177, of the secondary. folder is functional in assisting the downward folding of the final flap in preventing the buckling-of the wrapper during this operation. By the peculiar twisting of plates 170-170, and 17 3173, a gradual attenuation of the guide channel of the wrapping table is effected and in consequence of the curved edges 176, and 175, the final flaps of the wrapper arethus successively folded about the loaf in the manner above described. The movable elements which co-operate with the complementary stationary elements in effecting the folding are so timed and relatively proportioned as to producea uniform neat and snug envel: opment of the bread loaves with an attendant permanent creasing, thereby insuring a substantially wrapped package which will withstand the successive handling to which such commodities are ordinarily subjected.

As hereinbeforestated, parafiine is employed as an adhesive medium and the im-' prints initiallyapplied to the wrapping sheets become set before the package has been fully formed. In order to insure the proper sealing, I have provided the machine at suitable intervals along the wrapping table, with heating devices, preferably electrically operated and by which the daubs of parafline are sufficiently fused to bring about a per- ,fect union of the folded wrapping sheet.

again, as the cooler portions of the plate 118',

are encountered and the seal thus made permanent before the package leaves the ma chine.

Similar heating devices for fusing the remaining imprints of adhesive after the end folding of the package has been completed, are indicated at 181, 181, in Figs. I, and III, adjacent the far ends of the twisted folding plate 170. In this instance setting of the parafiine is rapidly effected by encountering the guards 182, attached to the guide angles 126.

In each instance, these heating devices are located at points, where the loaves come to rest at the end of each forward stroke of the pusher by which they are bodily progressed as already understood.

Having thus described my invention, I claim:

1. In a wrapping machine, the combination of a feeding means for the article to be wrapped; a wrapping table superimposed above said feeding means; means for temporarily arresting said article upon said feeding means; means for feeding a wrapping sheet to a central position over the article thus arrested; a pair of guide channels for engaging the'side edges of the sheet, said channels being partly interrupted to permit the release of the sheet: an elevator for moving said article to engage said sheet. to advance the same to the wrapping table; the uninterrupted portions of the channels serving, during the movement, to detain the ends of the sheet to effect a partial envelopment of the article.

2. In a wrapping machine, the combination of a feeding means for the article to be wrapped; a wrapping table superimposed: above said feeding means; means for temporarily arresting said article upon said feeding means; means for feeding a wrapping sheet to a central position over the article thus arrested; an elevator for moving said article to engage said sheet to effect a partial envelopment and advance the same to the level of the wrapping table; means capable of being automatically protruded beneath said article to temporarily support the same at said level during the, retraction .of the elevator; at reciprocatory folding plate adapted to be advanced to fold one end of the sheet beneath the said package while temporarily supported; a pusher adapted to advance said article from said plate and said nation of means for successively elevating articles to be wrapped, for placing wrappers in their upward path, for causing the Wrappers to envelop their tops and sides during their ascent, and for moving the elevated articles sidewise; and means for completinglenvelopment of the articles in the wrappers, including devices associated with the means'for moving the articles sidewise for infolding the overlapping wrappers at the adjacent side of the article, and means associated with said table for completing the envelopment, including two pairs of plates having their origins in horizontal planes above and below the package and gradually twisted longitudinallyin' opposite directions into directly opposed vertical planes, and a pair of means each being located between the horizontal portions of said plates for tucking the wrapper ends sidewise,land having a rearwardly extending portion disposed in opposed relation to the vertical portions of said plates.

4. In wrapping mechanism, the combina tion of means for successively elevating articles to be wrapped, for placing wrappers in their upward path, and forcausing the wrappers to progressively envelop their tops and sides under tension during their ascent; a foldingplate adapted to be advanced to fold one end of the sheet beneath the package; means for moving the elevated-articles sidewise from said folding plate';;means for infolding the wrappers at the sides of the article; and stationary devices adjacent the path of movement of the article with surfaces extending sidewise from said path at progressively increasing inclinations, relatively to the topand bottom of the article, so as to fold the wrappers inward on the articles at top and'bottomduring the sidewise movement of said article.

5. In wrapping mechanism, the combination of means for moving sidewise an article partially enveloped in an overlapping wrapper, stationary devices adjacent the path of movement of the article with surfaces extending sidewise from said path at progres sively increased inclination relatively to the top and bottom of the article for bending the overlapping wrapper inward 011. the

moving article from top and bottom, and stationary means associated with said devices havinginclined upper and lower edges adapted tocooperate with them by PIOVldof movement of the article with upper and lower surfaces extending sidewise from said path at progressively increasing inclination relatively to the top and bottom of the article for bending the overlapping wrapper inward on the moving article from top and bottom; and a stationary member mounted between the upper and lower surfaces aforesaid having a central portion for folding the wrapper inward on the article from its advancing side in preparation for the formation of the top and bottom folds, and divergent-1y inclined upper and lower edges that co-operate with the aforesaid .upper and lower surfaces by provided creasing edgesoverwhichthe top and bottom folds are bent, said stationary member being enclosed within said folds while the latter are bent inward.

7. In wrapping mechanism, the comblnation of a pusher for impelling sidewise an article vpartially enveloped in an overlapping wrapper, and angular clips pivoted to and projecting forward from said pusher so I as to engage the overlapping wrapper'at the side of the article toward the pusher side, and'upper and lower edges divergently:

inclined therefrom in the direction of movement of the article, and concurently acting means co-operatingwith said inclined edges to fold the overlapping wrapper inward on the article from top and bottom.

In' testimony whereof, I- have hereunto signed my-name at Philadelphia, Pennsyllvania, this 19th day of October 1918.

' JOSEPH PERCY REMINGTON.

' andjfoldit inward thereon, said clips noranally diverging? forward from the pusher, but having arms that engage the side of the

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