US2044606A

US2044606A - Box machine

Info

Publication number: US2044606A
Application number: US44315A
Authority: US
Inventors: Theodore A Federwitz
Original assignee: Stokes and Smith Co
Current assignee: Stokes and Smith Co
Priority date: 1935-10-10
Filing date: 1935-10-10
Publication date: 1936-06-16
Anticipated expiration: 1953-06-16

Description

June 16, A, FEDERWlTz 2,044,606

BOX MACHINE Filed Oct. 10, 1935 7 Sheets-Sheet 1 INVENTOR.

ATTQRNEY.

/ amwwwmwum BY M June 16, 1936. FEDERWITZ 2,044,606

BOX MACHINE Filed Oct. 1O,v 1955 7 Sheets-Sheet 2 INVENTOR.

QWM

ATTORNEY.

June 16, 1936. T. A. FEDERWITZ BOX MACHINE Filed Oct. 10, 1935 7 Sheets-Sheet 3 M :4 52%; ATTORNEY.

T. A. FEDERWITZ Filed Oct. 10, 1935 June 16, 1936.

INVENTOR. ig, a.

ATTORNEY.

IMMUNE H ll [TI IMHMIIMIIWMMMINI gig. 6;

June 16, 1936. wn-z 2,044,60fi

BOX MACHINE Filed Oct. 10, 1935 7 Sheets-Sheet 6 INVENTOR.

- :4 GM ATTORNEY.

Patented June 16, 1936 UNETEE STATES httdt t BOX MACHINE Theodore A. Federwitz, Philadelphia, Pa, assignor to Stokes and Smith'Company, Summerdale, Pa., a corporation of Pennsylvania Application October 10, 1935, Serial No. 44,315

.16 Claims. (Cl. 9354.2)

My invention relates to apparatus for covering previously formed or stayed boxes for applylng thereto a wrapper, label, or equivalent, or for forming a box from a single or multipiece box blank by applying sheet material, as a tabbed or untabbed wrapper, ortabs solely, previously partially applied or adherent-to the box blank, to hold the box-blank elements in box-forming position; and relates particularly to box machines of the type having a reciprocating form block which carries the box structure through various sheet-applying and/or staying stages.

In accordance with my invention, to permit highspeed operation of the machine for increased output, there is provided in each cycle of the machine a period, during which a stayed or unstayed box may be placed on the form-block which is a materially greater proportion of the machine cycle than heretofore, and which is, for

manual application of boxes to the form block,

of materially greater or several times the duration of the time permitted in prior machines thereby to require less effort on the part of the operator in compensation for the greater labor required in applying a much greater number of boxes to the form block; the prolongedfeeding time may be obtained either by causing the form block to remain at rest in a predetermined boxreceiving position for a substantial part of the cycle after the previously completed stayed, tabbed,-or wrapped box has been stripped from the form block and removed or ejected from the machine, or by causing the form block structure to move slowly toward the first of the sheetapplying tools during a substantial part of the machine cycle.

More particularly, the operating mechanism for the various sheet-applying tools is constructed to effect completion of the wrapping, staying, tabbing or formation of a box within a substantially reduced proportion of the cycle of operation of the machine and to make available, either by dwell or pause or by protracted slow motion of the form block structure, a greater proportion of the cycle for feeding of a box or box blank to the form block structure.

Further and more'specifically in accordance with one form of my invention, a completed box 50 is stripped from the form block and removed or ejected from the machine substantially before the beginning of the next cycle of the machine, to allow a substantial period during which another box structure can be placed on the form 55 block.

In accordance with another form of my invention, a prolonged feeding time is obtained by providing for slow motion of the form-block structure during its travel toward the sheet-applying tools. 5

My invention resides in the features of construction, combination, and arrangement hereinafter described and claimed.

For an understanding of my invention,.reference is to be had to the accompanying drawings 10 in which:

Figure 1 is a side elevational view with parts in section of a box machine;

Fig. 2 is a front view in section and on enlarged scale of the operating plungers for the form 15 block shown in Fig. 1;

Fig. 6 is a front elevational view, in section 25 i and on enlarged scale, of one of another of the tool slides of Fig. 1;

Fig. 7 shows tools of Fig. 4 in a difierent operating position;

Fig. 8 is a detail view illustrating box-stripping action of mechanism shown in Figs. 1 and Fig. 9 is a timing diagram of the various components of the box machine of Fig. 1;

Fig. 10 is a development of the cams for oper- 35 ating the form block components and certain of the sheet-applying tools;

Fig. 11 is a modification of Fig. 10.

Referring to Fig. 1, the box machine is generally of the type disclosed in Nitsch et al. Patent No. 1,540,900 and Federwitz Patent No. 1,924,681.

The main cam I is driven from a suitable source of power, not shown, through the one-time clutch 2 controlled by the foot pedal 3. A suitable clutch construction is more fully shown in Rider et al. Patent No. 1,916,440. If the pedal 3 is held depressed, the cycle of operation of the machine continuously repeats, the form block structure F moving from the box receiving position shown in 0 Fig. 1 downward along a path adjacent the slide units Sl-Sfi carrying the various wrapping tools, and then returning upwardly to its original position. When the form block F is in the position shown in Fig. 1, an operator places thereon an or box blank to be wrapped and/or stayed was very small, corresponding in time with approximately 15 of a revolution of the main cam I which rotates once for each cycle of the machine. Consequently it was previously necessary, in order to provide sufiicient time for an operator to place the assembly on the form block, either to run the machine at slow speed, or to allow the one-time clutch 2 to stop the machine at the end of each cycle, the operator tripping the clutch by the pedal 3 to initiate the next cycle after a box had been placed on the form block F both modes connoting low output. The purpose of the changes in construction hereinafter described is substantially to increase the proportion of the cycle in which the form block is in position and accessible to receive a box so that the machine may be operated continuously at higher speed and output and yet provide sufficient at least as much time as in the prior machines in .each cycle "for an operator to place a box or box blank on the form block. In other words, notwithstanding' the time per cycle is decreased, the number of cycles in a given time increased, the operator, for continuous operation of the machine, is afforded in each cycle sufficient time to place a box structure and adhering wrapper and/or tab material on the form bottom block.

The form block structure F comprises, as shown in Figs. 1 and 2, the'main form block MF and the auxiliary form block AF. The combined height, width and length of the form block components AF and MF correspond respectively to the inside height, width and length of the boxes to be wrapped or formed. The form block MF is secured to the lower end of the bar 4 connected at its upper end to the block 5, Fig. 2, which is suitably secured in the lowerend of the plunger or cylinder 6 slidable within the fixed guide member I. The rack 8, integral with or attached to the cylinder 6, is adapted to mesh with the gear 9 rotatable with the pinion I0, Figs. 2 and 3. Pinion II for driving gear I0 is rotatable with gear I2 which is in mesh with the gear sector I3 secured to arm I4 which is pivotally supported by the shaft I5 extending from the frame member I6. To the other end of arm I4, Figs. 1 and 3, is connected with the link I6 whose lower end is pivotally connected to one end of arm I'I whose other end is provided with a cam follower I8 engaging the cam track I9.of cam I. Accordingly, as cam I rotates, the form block MF is reciprocated to and from the position shown in Fig. 1

in accordance with the timing diagram of Fig. 9.

The form block AF is connected to the lower ends of the rods 20 which pass through the block 5 and are connected to the lower end of the rod 2| which passes through the block 22 in the upper end of cylinder 6. The cap 23, secured to rod 2| exteriorly of plunger 6, extends beyond the periphery of plunger 6 for a purpose hereinafter stated. The spring 24 disposed between the collar 25 secured to rod 2| and the block or plug 22, serves to maintain the form block components AF and IMF in engagement, form block AF, ex-

cept as hereinafter provided, moving with the form block MI in accordance with the cam track I9 ofmaincam I.

The bar 26, Figs. 1 and 2, is suitably secured to the hollow plunger 21 also slidable in the guide 5 member I. The rack 28 secured to or-integral with the plunger 21, is in mesh with gear 29 rotatable with bevel gear 30, Fig. 3, which is in mesh with the bevel gear 3|. The gear 32, rotatable with gear 3| is inmesh with the gear sector 33. The arm 34 effecting oscillation of gear sector 33 is actuated by cam track 35 of the main cam I through a lever and link arrangement similar to that afforded by the arm I! and link I6. As will hereinafter more clearly appear, 15 the movement of the plunger 21 controls removal of the completed box from the form block by the strippers 36 and also provides for separation of the form block components AF and IMF for oper-- ation of certain of the wrapping tools.

As the form block structure descends from the position shown in Fig. 1, it meets the platen P carried by the cylinder 31 suitably biased, as by a spring (not shown), to the upper dotted line position, Fig. 4. As the form block structure con- 25 tinues its downward movement it passes between the slide units SI to S4. The slide units SI and S2 are disposed adjacent the path of travel of the sides of the box and the slide units S3 and S4 are disposed adjacent the path of travel of 30 the ends of the box. Since the side units SI and S2 are identical, the construction and operation of only one of them need be described in detail. Referring to Fig. 4, the slide unit SI'co'mprises a housing 38 resting on the frame plate 39 of the 35 machine. The cam barrel 40 disposed within housing 38 rotates with shaft 4| journaled at its opposite ends in the frontand back of the housing. The

thrust bearings

42 and 43, at opposite ends of the cam barrel, accurately main tain its position to prevent axial displacement which would affect operation of the tools hereinafter described. The gear 44, secured to and rotatable with the cam barrel, is in continuous engagement with the gear 45 which is slidable with 45 housing-38 relative to shaft 46. The key 41, or equivalent, provides for continuous driving engagement between gear 45 and shaft 46 for all 1 positions of the housing and during its adjustment in setting the slide for different sizes of boxes. 5.0 This adjustment is effected by rotation of the threaded member 47 which engages the nut 48 secured to the housing 38. To the other end of shaft 46 is secured a beveled gear 49 which meshes with gear 50 rotating in unison with main cam I. 55 It is to be understood that each of the slide units includes a cam barrel corresponding to cam 40, which is similarly driven from the main cam I. The roll 5| is carried by a frame comprising the rods 52 which extend through the 60 front and rear walls of the housing 38 and are joined by the cross-member 53 exteriorly of the housing and cross-member 54 interiorly thereof. To the latter is pivoted the link member 55 connected at its other end by pivot pin 56 to one arm of a lever 57 pivoted at 58 to the housing 33. The other end .of lever 51 is connected through pin 59, link member 6I'I, and pin 6| to onearm 62 of a bell-crank lever pivoted at 63 to housing 38, and whose other arm carries a cam follower 64 in 70 engagement with groove 65 of cam barrel 40.

Accordingly, for each rotation of the cam bar- .rel 40, which occurs once for each cycle of the machine, the roll structure 5| is moved toward and away from the path of the form block struc- 75 ture F. The roll 5I wipes the side panel of the wrapper into engagement with the side panel of the box as the box moves downwardly from the top dotted line position indicated in Fig. 4. When the box is unstayed, the roll 5I has the additional function of erecting the side of the box. The timing of the movement of the roll is hereinafter more fully described.

The frame 66 comprises the rods 61 guided by the front and rear walls of housing 38 and joined exteriorly thereof by the cross-member 68. The frame 66 carries two corner-lap tools 69, one for each end of the box, which fold the corner-lap sections CL of the wrapper side panel into engagement with the ends of the box. The crossmember I9 is pivotally connected by pin 'II to one end of link I2 whose other end is connected by pin I3 to the upper end of the lever I4 whose lower end carries the cam follower I5 in engagement with groove I6 of cam barrel 49. The lever I4 is pivotally mounted on shaft -'II whose opposite ends are received by the opposite sides of housing 38. The timing of the operation of the corner-lap tools is hereinafter more fully described.

The marginal turn-in finger I8 which folds over the portion M of the wrapper extending above the top of the box side is mounted upon a frame I9 comprising the rods 89 which extend through the housing 38 and are supported by the front and rear walls thereof. To the cross-member M of the frame is pivotally connected, by pin 82, the link 83 which is connected by pin 84, to the upper end of lever 85 whose lower arm carries the cam follower 86 for engagement with groove 91 of the barrel cam 49. The shaft 88, upon which lever 53 is mounted, extends transversely of the housing,- its opposite ends being received by the opposite sides of the housing.

The presser block 89 is carried by the frame 99 which comprises the two slidable bars 9I 'connected interiorly of the housing by cross-member 92 to which the link 93 is joined by pin 94. Lever 95, whose lower end carries the cam follower 96 for engagement with groove 91 of cam barrel 49, is connected at its upper end to the link 93 by the pin 98.

All of the tools of slide unit SI for working upon the box blank, or box, and partially applied wrapper or tab structure, are operated from the common barrel cam 49. The mechanism described for operating the tools, as will hereinafter more fully appear, permits the completion of the wrapping or forming of the box in a substantially reduced fraction of the complete cycle of operation of the machine and so makes it possible to prbvide for a longer period of dwell of the form block in box-receiving position.

The construction of the two end slide units is similar to Fig. 4 except for omission of the cornerlap tools and their operating mechanism. For

brevity, therefore, the construction and operation of the side slides, one of which is shown in Fig. 6, is not repeated, corresponding elements being identified by the same reference character with addition of the subscript e. The two end slides S3 and S4 are identical except that one of them, S3, Fig. 6, is provided with additional mechanism for ejecting the finished box.

The housing 99 for the ejector is adapted to be suitably secured to the housing 38s of the slide S3. The shaft Me is suitably elongated to carry the cam I99, which preferably can be adjustably secured in different angular positions to the shaft 4Ie. The lever I9I pivoted on shaft I92 is provided at one end with a cam follower I93 for engagement with the groove I94 of cam I99. The arm IN is biased to the position shown in Fig. 6 by the spring I95 disposed between the housing and the collar I96 on rod I9'I which is pivotally connected by pin I08 to the lever I9 I. The upper end of the lever I9I is bifurcated and is provided with inwardly directed pins I99 for engaging the groove I I9 of the member I II secured to the ejector cylinder II2. To the other end of the cylinder is secured the plug I I3 having on its outer face a block I I4 of suitable shock-absorbing material. The ejector rod II5 passes through cylinder III and plug H3 and is provided exteriorly thereof with a stop plate II6. When the parts are in the position shown in Fig. 6, the balls II'I prevent movement of the ejector rod, so that as arm I9I rotates in clockwise direction from the position shown, spring II8 between the plug II3 of cylinder H2 and the collar H9 or rod to be cammecl outwardly by the sloping surface I22 of rod H5. The ejector rod is thus released for rapid, forcible movement by the compressed spring II8 to eject a completed box from the machine.

As lever I9I is moved in counterclockwise direction towards the original position shown in Fig. 6, the rod H5 is moved to the left by the engagement between cylinder H2 and the stop II6. When the section I23 of reduced diameter of the rod comes opposite the balls II'I they are forced inwardly by the sleeve I29 under the influence of spring I24. The elements of the ejector mechanism are thus reset to the position shown in Fig. 6.

In the machine shown and according to the timing diagram of Fig. 9, the machine cycle begins when cam I is in such-position that the form block will begin its downward movement upon movement of the cam from such position and is completed when the cam I-m'akes one revolution and returns to thatposition. It is to be understood, however, that my invention is not limited to beginning of the cycle at any particular position of the form block.

In describing the operation of the machine, it is assumed that a box and wrapper assembly have been placed upon the form block and that the form' block has moved downwardly from theboxreceiving position of Fig. 1 to the upper dotted line position shown in Fig. 4. As the form block continues to move beyond this position, the side rolls 5I of units SI, S2 wipethe side-panels of the wrapper into engagement with the side walls of the box. When the form block reaches the position 'shown in full lines in Fig. 4, the form block remains at rest for about 20 of rotation of the cam I, Figs. 9 and 10. Preferably slightly before the form block reaches this position, the corner-lap tools 69 start to move inwardly to the position shown and complete their inward movement after the form block has resumed its downward travel, the tools remaining in their forward position, Fig.4, for approximately 25 of rotation of the one-time cam I,Figs. 9 and 19. The corner-lap tools are then returned to their original position and remain there throughout the remainder of'the cycle.

As the form block continues its movement, the end rolls 5Ie wipe the end panels of the wrapper into adhesive engagement with the end walls component AF. The movement of the form block component MF continues until the top edge of the box is in the plane of the marginal turn-in tools 18, Fig. 7, whereupon the form block componets AF and MF remain stationary for approxi-- mately rotation of the cam l, Figs. 9, 10 and 11. fingers 18 are moved inwardly to move the margins M, Fig. 7, of the wrapper projecting beyond the top edges of the box inwardly to an angle of approximately 90. While the tools 18 remain in, cylinder 21 is lowered under the control of cam groove of the main cam l to allow the upper form block components AF to drop on the turn-in fingers, and shortly thereafter the turnin fingers are withdrawn so that the upper form block by gravity and with the assistance of spring 24 moves downwardly to its original position against the form block component'MF and, in doing so, turns the inturned margins of the wrapper another 90 into engagement with the inside of the box. a

The significant movements of a turn-in finger 18 are performed, in the examples'illustrated by Figs. 10 and 11, in a period corresponding withabout 60 of a total cycle of the machine, and more particularly within the period comprising the turn-in dwell of the form block component MF corresponding with about 25 of said cycle; both said periods may vary, generally inversely,

from their aforesaid exemplary magnitudes in accordance with such variations in the prolonged period of accessibility or dwell of the form block,

structure, for placing a-box and wrapper thereon, as come within the spirit of my invention. The

aforesaid significant movements of a turn-in.

finger may, for brevity, be termed turn-in movements, which include, as indicated in Figs. 10 and 11, a dwell of the finger, the significant or essential portions of the movements toward and away from the dwell, all'coming within the turnin" dwell of the form block component MF. The period of these significant turn-in movements, in the examples illustrated, falls within the period of the hereinafter described significant movements of the presser block.

Substantially concurrently with the initial inward movement of the turn-in fingers, the presser blocks 89 lightly press the side and end'walls of the box against the lower form block MF. After the margin of the-wrapper has been turned in against the inside of the box by the descent of the upper form AF, the form block components move as a unit under the control of cam groove I 9 of the main cam l to a slightly lower position, bringing the upper edge of the box approximately even with or preferably slightly belowthe upper edge of the presser blocks. The motion of the form block is then again arrested by cam groove l9 and during the dwell, the tools 89 are again operated to exert a heavy pressure which insures intimate adhesive engagement between the turnedin margin of the wrapper and the inside of the box.

The presser blocks are then moved outwardly and the form block structure is moved upwardly to carry the completed box to the discharge position.

During this time the marginal turn-in,

The significant movements of a presser block 89 are performed, in the examples illustrated by Figs. 10 and 11, in a period corresponding with about 100 of a total cycle of the machine, and more particularly within the period, comprising the. turn-in and hard-press dwells (and transition from the one to the other) of the form block component MF, corresponding with about 80 of said cycle; both said periods may vary, generally inversely, from their aforesaid exemplary magnitudes in accordance with such variations in the prolonged period of accessibility or dwell of the form block structure, for placing a. box and wrapper thereon, as come within the spirit of my invention. The aforesaid significant movements of the presser block are, for brevity, termed pressure movements, which include its movement to and dwell in light pressure position, movement to and dwell in hard pressln'e position,

and release of the hard pressure, which series of brevity, collectively termed turn-in dwell.

Asthe form block and completed box approach the position of Fig. 8, the upward movement of cylinder 21 is arrested to retain the stripping tools 36 in the position of Fig. 8 so that the continned upward movement of the form block to the position of Fig. 8 is accompanied by stripping of the completed box therefrom. When the form has moved sufiiciently to clear the box, the movement of cylinder 28 is resumed to lift the strippers 36 out of the box and substantially as soon asthe strippers are free of the box, the ejector H5 fires, forcibly to remove the completed box from the machine.

With the improved construction shown and in accordance with Figs. 9 and 10, all of the wrapping operations have been completed in about 165 of a revolution of cam I, whereas, in prior machines of this type about 220 movement of the main cam was required to effect completion of the wrapping operations. The form block is stationary at its upper or box-receiving position, Fig. l, for approximately 80 of the revolution of the cam I, Fig. 9, whereas, in the prior machines the dwell was not greater than about 30. Furthermore, in the prior machines the dwell did not permit an operator to place another box on the form because the strippers did not clear the box until practically the end of the cycle and the ejector did not fire until substantially the end of the cycle. In the present construction, the strippers are clear of the box and the ejector fires to remove the completed box shortly after the beginning of the long form block dwell, Fig. 9,

leaving substantially entirely allof the dwell available to an operator to place another assembly on the form.

The relation between the movements of the form block and the various wrapping tools, the strippers and the ejector can be clearly understood from the timing chart of Fig. 9 and the should not be at high speed because of the substantial weight and inertia of the mechanism which produces it.

Instead of constructing the main cam to provide a long dwell or pause of the form block at box-receiving position as in Figs. 9 and 10, it may, as will be understood from Fig. 11, be constructed to provide relatively slow downward movement of the form block structure from the top of its stroke toward the sheet-applying tools. For this part of the cycle, the form block is clear of all obstructions and in condition to receive an assembly of sheet material with a stayed or onstayed box. By providing for slow motion of the form block in this part of the cycle, corresponding with the time between points 0 and about (or higher, depending upon the depth of the box) Fig. 11, there is ample time afforded in each cycle to place an assembly on the form block structure even when the machine is operated at speeds substantially in excess of those corresponding with production of twenty boxes per minute. This prolonged feeding time is contributed to by the above-described improved operating mechanism for the various sheet-applying tools which effects completion of their operations in a substantially smaller fraction of the cycle than heretofore. As apparent from comparison of Figs. 10 and 11, the operation of the sheet-applying tools occurs later in the cycle of Fig. 11 though in both modifications the proportion of the cycle required for the wrapping and/or staying operations, and the proportion of the cycle available for feeding a stayed or unstayed box to the form block structure, are substantially the same.

The longest total period or entire time occupied or consumed, within one cycle of the machine, by and in operation of a wrapping tool, for example the presser block 89, or the total period or entire time occupied by or consumed in operation of a plurality of wrapper tools, for example presser block 89 and turn-in finger I8, corresponds with, in the examples illustrated, approximately 90 or one-quarter of a complete cycle of the machine; and the period of accessibility of the form block structure for feeding thereto is, in the examples illustrated, from about 40 to 60 of an entire cycle of the machine. For the purposes of my invention, the ratio of the aforesaid total period for operation of one or more wrapper tools, particularly presser block and/or turn-in finger, to the period of accessibility of the form block structure ranges from about 2 to about 1.5. The period of accessibility o the form block structure, the period of wrapper-tool movement or operation, or the magnitude of their ratio to each other, may vary from that corresponding with the examples illustrated so long as there is procured one or more advantages of my invention. In general, the period of accessibility of the form-block structure for feeding thereto and/ or the aforesaid period of opera.- tion of aforesaid wrapper-applying tool or tools so substantially differs or differ from prior practice as to procure an output material in excess of twenty Wrapped or stayed boxes per minute, without exceeding the skill or endurance of the operator, or as to impose upon the operator less strain and fatigue at any machine speed or output whether it be that of the aforesaid old practice or materially higher as exemplified herein.

The cycle of the machine, in accordance with my invention, is new and different in nature and characteristics from thatof the aforesaid oldtype machines, so significantly different that a new order of capacity or output is attained, and so significantly different that the movements of the operator as imposed or permitted by the so differing cycle are performed with greater ease, smoothness and efficiency, and, as confirmed in practice, with less strain and with less simply physical fatigue.

With the improved construction shown, the percentage of the cycle in which the operator may place a box on the form block is so substantially increased that the machine may be operated continuously and at higher speed, giving greater output, and yet afford ample time in each cycle for the operator to place a box and wrapper on the form block. With the prior mechanism, assuming an operating speed of about twenty boxes a minute, there was an interval of about only 0.1 second when the form block was stationary and in condition to receive a box, whereas, due to the above described improvements, the present machine, operating at the same speed, provides a period of about .66 second, onabout .44 second for a speed of 30 boxes per minute, when the form block is in condition to receive a box. I

A skilled operator is able, with the aforesaid old-type machines, to feed to the form-block about twenty boxes per minute, with a box feeding time, as aforesaid, of about .1 second. In accordance with the present invention, however, the time for manually applying a box to the form-block is as long as heretofore, and may be and preferably is several times as great as heretofore, to compensate for the greater labor otherwise imposed upon the operator to feed to the form-block many more, for example thirty, boxes per minute.

It is therefore apparent the speed of the machine in accordance with the present invention corresponds with an output materially greater than twenty boxes per minute, for example, thirty boxes per minute, and there is afforded in each cycle of the form-block a box-feeding period not only as great as the feeding period in the prior slower speed machines, but which may be and preferably is several times as great, in order to ease the operator sufiiciently to permit, for example, thirty feeding operations per minute and yet not exceed the average operators skill or endurance.

The increased length of time in which the form block is in position and in relation to receive a box blank is also of advantage when the boxes and blanks are fed automatically to the form block, since it simplifies the construction and operation of the automatic feeding mechanism.

The period of accessibility of the form block structure, for feed thereto, manually or automatically,'of a box and wrapper, includes, in accordance with my invention as embodied in machines of the particular constructions hereinbefore described, the total time, without stopping the machine, elapsing from the time the form block structure is clear of the box-removing means substantially or approximately up to the time when there remains insufficient clearance for admission of the next box to be wrapped.

For brevity in the appended claims, the term wrapping is used generically to comprehend the application of wrappers, tabbed or untabbed, or of staying or tabbing material; and the term box is used generically to comprehend a stayed, an unstayed box, a box blank, or one or more components of a multipiece box blank.

.What I claim is: V

1. A box wrapping machine having an output materially in excess of twenty boxes per minute comprising form-block structure, mechanism including cam structure, for reciprocating said form-block structure, constructed. to provide a period of accessibility of said form-block struc- "materially in excess of about twenty boxes per minute comprisingform-block structure, mech-,

anism including cam structure, for reciprocating said form-block structure, constructed to provide a period of dwell or slow movement of said form- -block structure, which includes a period during which box structure may be applied, materially in excess of 30 of a total cycle of'the machine, a plurality of wrapper-applying tools, and cam structure constructed to complete the movements of said tools during a total period dissimultaneous with respect to the aforesaid dwell or slowmovement of said form-block structure.

3. A box wrap'ping'machine having an output materially in excess of twenty boxes per minute comprising form-block structure, wrapper turn-in and presser tools, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide-aperiod of accessibility of said form-block structure, for applying box structure thereto, not less than about 40 of a total cycle of the machine, and to provide a turn-in dwell of said form-block structure distinct from said period of accessibility, and mechanism including cam structure to eflect completion of the turn-in and pressure movements of said tools in a period within the range from about 100 to 120 of 'a total cycle of the machine. v

4. A box wrapping machine having an output materially in excess of twenty boxes per minute comprising form-block structure, wrapper tumin and presser tools, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a period of accessibility of said form-block structure, for applying box structure thereto, not less than about 40 of a total cycle of the machine, and to provide a turnin dwell of said form-block structure of materially less than 140 of a total cycle of the machine, and mechanism including cam structure to effect completion of the turn-in and pressure movements of said tools during said dwell.

5. A box wrapping machine having an output materially in excess of twenty boxes per minute comprising form-block structure, wrapper turn-in and'presser tools, mechanism including cam structure, for reciprocating said form-block .of the machine.

6. A box wrapping machine comprising form- 'block structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide access to said form-block structure, for applying box structure thereto, 5 for not less than about 40 of a total cycle of the machine, wrapper turn-in and presser tools, and mechanism including cam structure constructed to effect completion of the turn-in and pressure movements of said tools in materially less than 10 140 of a total cycle of the machine.

'7. A box wrapping machine comprising formblock structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a dwell or slow movement 15 of said form-block structure, which includes a period during which box structure may be'applied, materially in excess of 30 of a total cycle of the machine, wrapper turn-in and presser tools, and mechanism including cam structure constructed to efiect completion of the-turn-in and pressure movements of said tools in materially less than 140 of a total cycle of the machine.

8. A box wrapping machine comprising formblock structure, mechanism. including cam structure, for reciprocating said form-block structure, constructed to provide accessibility of said formblock structure, for applying box structure thereto, for a period not less than about 40 of a total cycle of the machine, presser tools, and mecha- 30 nism including cam structure constructed to effect completion of the pressure movements of said tools in materially less than 140 of a total cycle -of the machine.

,mechanism including cam structure constructed to effect completion of the pressure movements of said presser tools in about of a total cycle 45 10. A box wrapping machine comprising formblock structure, mechanism including cam structure for reciprocating said form-block structure and constructed to provide a substantial dwell or of said tools, while said form-block structure is at rest, in materially less than about of said cycle.

11. A box wrappingmachine comprising formblock structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a dwell or slow movement of said form-block materially in excess of 30 of a total cycle of the machine, tools for applying a wrapper to box structure 'on said form-block structure, stripping means for removing a completed box from said form-block structure, means for ejecting a stripped box from said machine, and mechanism including cam structure for com- 70 pleting the. operation of said tools, said stripping means and said ejecting means within a total period such that thereafter there remains of said Idwell or slow movement a period not less than about 30 of said machine cycle for accessibility 76 of said form-block structure for applying box structure thereto. A g

12. A box wrapping machine comprising formblock structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a period of accessibility of said form-block structure, for applying box structure thereto, of not less than of a total cycle of the machine, and to provide a turn-in dwell of said form-block structure distinct from said period of accessibility, turn-in and presser tools, and mechanism including cam structure to efiect completion of the turn-in and pressure movements of said tools during said dwell.

13. A box wrapping machine comprising formblock structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a period of accessibility of said form-block structure, for applying box structure thereto, of not less than 50 of a total cycle of the machine, wrapper turn-in and presser tools, and mechanism including cam structure constructed to effect completion of the turn-in and pressure movements of said tools in a period within the range from about to of a total cycle of the machine.

14. A box wrapping machine comprising formblock structure, presser tools, mechanism including cam structure, for reciprocating said formblock structure, constructed to provide a prolonged dwell or slow movement, within which the form-block structure is accessible to receive box structure, not less than about 40 of a total cycle of the machine, and mechanism including cam structure for operating said tools and constructed to complete their pressure movements in materially less than about of said cycle and within a period from about two to not more than seven times as great as the period during which said vform-block is accessible.

.each cycle a period of accessibility not less than 0.2 second, for manual application of a box to said form-block structure, wrapper turn-in and presser tools, and mechanism including cam structure for completing the turn-in and pressure movements of said tools in about 100'of a total cycle of the machine.

16. A box wrapping machine having an output materially in excess of twenty boxes per minute comprising form-block structure, mechanism including cam structure, for reciprocating said form-block structure, constructed to provide a pe= riod of accessibility of said form-block structure, for applying box structure thereto, of not less than about 40 of a total cycle of the machine, and a plurality of slide units adjustable toward and THEODORE A. FEDERWITZ.

CERTIFICATE OF CORRECTION.

Patent No. 2,044,606. June 16, 1936.

THEODORE A. FEDERWITZ.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, first column, line 22, after "1? insert a semicolon; line 29, strike out the word. "sufficient"; page 5, first column, line 14, for "onstayed" read unstayed; line 6'7, for "material" read materially; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 29th day of December, A. D. 1956,

Henry Van Arsdale (S a A ting mmissi ner of Patents