US2352720A

US2352720A - Gluing mechanism for box-making machines

Info

Publication number: US2352720A
Application number: US447843A
Authority: US
Inventors: Cutler D Knowlton
Original assignee: Hoague Sprague Corp
Current assignee: Hoague Sprague Corp
Priority date: 1942-06-20
Filing date: 1942-06-20
Publication date: 1944-07-04
Anticipated expiration: 1961-07-04

Description

July 4, 1944 c. D. KNowLroN 2,352,720

GLING MECHANISM FOR BOX-MAVKING MACHINES Filed June 20, 1942 4 Sheets-Sheet l July 4, 1944.

C. D. KNOWLTON GLUING MECHANISM FOR Box-MAKING MACHINES Filed June 2o, 1942 4 sheets-sheet 2 July 4, 1944. c. D. KNowLToN GLUING MECHANISM FOR BOX-MAKING MACHINES Filed June zo, 1942 4 Sheets-Sheet 5 July 4, 1944.

C. D. KNOWLTON GLUING MECHANISM FOR Box-MAKING MACHINES Filed June 20, 1942 4 Sheets-Sheet 4 Y VE N T i@ Patented July 4, 1944 GLUING MECHANISM Fon BX-MAKING Maonmas Cutler D. Knowlton, Rockport, Mass., assignor to Hoague-Sprague Corporation, Lynn, Mass., a corporation of Massachusetts K Application June 20, 1942, Serial No. 447,843

1s claims. '(ol. en -49) This invention relates to a machine for the forming and pressing of such articles as paper boxes and is directed especially to adhesive-applying mechanism for such machines.

In my prior machine, as disclosed in my application for United States Letters Patent ySerial No. 410,274, filed September 10, 1941, box-blanks of the type in which the end formation consists of corner-laps, an end-wing, and an infolded extension for the end-wing are operated upon by a series of mechanisms designed to apply adhesive to the inner face of an end-wing and its extension, thereafter to fold the end-wing into engagement with the corner-laps and the extension over the edges of the corner-laps so that it adheres to the inside surfaces, and, finally, to apply pressure to the superposed parts to cause permanent adhesion. As shown herein, the corner-laps are partially folded inwardly by the operator and the box is placed end down, that is, with its long dimension in a substantially vertical position, upon a tablel or guide having an upwardly directed terminal extension which completes the folding' of the corner-laps. In this vertical position the blank is advanced along the table, with the end-wing extending downwardly in a vertical plane, to adhesive-applying mechanism which consists of a vertically disposed adhesive-applying roll and a co-operating pressure-applying roll for holding the end-wing in contact with the adhesive-applying roll.

It is an object of the present invention to provide an improved support for the adhesive-applying roll employed in the aforesaid machine, to provide for more accurate control of the adhesive on the applying roll, to eliminate spatter, and to simplify the construction and arrangement of the control of the adhesive, a doctor blade is held in contact with the surface of the applying roll, between the point on its surf ace to which the adhesive is supplied and the point of contact with the work, to spread the adhesive in a uniform lm for application to the inner face of the end- -wing of a box. Means is also provided for adjusting the position of the doctor blade to regulate the thickness of the film, and valve means is provided for by-passing a portion of the adhesive which is elevated through the passage in order to regulate the amount of adhesive delivered to the top of the applying roll. It is to be observed that by using a doctor blade instead of a doctor roll for controlling and governing the thickness of the film of adhesive on the surface of the applying roll, the spatter which accompanies the breaking of threads of adhesive formed between the retreating surfaces of the applying roll and the doctor roll is eliminated. This is due to the fact that the threads which are produced by the movement of the applying roll away from the doctor blade are drawn out so nearly tangent to the surface of the applying roll that they coalesce with the adhesive on the surface of thel roll before they have an opportunity to break and thus spatter over the work and onto parts of the machine.

'I'he details of the improved construction of the aforesaid machine will now be described with reference `to the accompanying drawings, in which Fig. 1 is a side elevation of my prior machine, showing the disposition of my improved adhesive-applying mechanism;

Fig. 2 is an ang'ular view of a box-blank of the type operated upon, with the corner-laps mechanism in order to minimize manufacturing costs.

In the accomplishment of these objects, the adhesive-applying roll is supported at its lower end in an adhesive receptacle for rotation about a vertical axis and is partially surrounded along one side and the back by a block having a substantially cylindrical recess conforming to the surface of the roll. As illustrated, the block supports the roll against lateral pressure applied thereto by a pressure-applying roll which is arranged to press the end-wing against the adhesive-applying roll and constitutes means for supplying Aadhesive to the top of the roll. I'his latter function is accomplished by providing a vertical passage in the block the lower end of which terminates in the receptacle and the upper end of which tenninates adjacent to the top of the roll and pumping adhesive through the passage by means of a pair of meshing gears submerged in the receptacle adjacent to the lower end of the passage, one of the gears being adapted to rotate the applying roll. To provideaccurate folded and resting upon the table of the machine;

Fig. 3 is ,a section taken on the line III-III of Fig. 4;

Fig. 4 is a side elevation as seen from the right side of Fig. 1, partly in section;

Fig. 5 is a plan view of av portion of the machine with the support for the work broken away in part to show the adhesive-applying mechanism;

Fig. 6 is a section taken on the line VI-VI of Fig. 4; and

Fig. 7 is a fragmentary view, showing the position of the end-wing between the adhesiveapplying roll and the pressure-applying roll.

The work for which the present machine is` particularly suited is illustrated in Fig. 2 as a boxblank which, when set up. is of the type customarily employed for packing shoes. The blank B has an end formation consisting of corner-laps a, and an end-wing b having an extension c, the corner-laps being folded into a position at right angles to the sides of the box, the end-wing being folded so that it overlles the comer-laps, and the extension being foldedgyer the top edges of the comer-laps and secured to the inside to provide a 'nished box. Tops for boxes of this type ,are correspondingly formed and set up and may be operatedupon in the same manner without modification of the machine. As illustrated and described in my application referred to above, the operator sets up each end of the box as a separate operation, and to do this. he preliminarily bends the corner-laps inwardly to a position substantially at right angles to the body of the box and places the box with its long dimension in substantially a vertical position with its infolded corner-laps in contactwith a table or.` guide t (Fig. l) having a. horizontal portion Il and an inclined terminal portion I2 which merges into the horizontal portion Ill by a, curved connecting portion Il. The curved portion Il between the horizontal portion I of the table and the upwardly inclined terminal portion I2 thereof receives the inwardly partially folded cornerlaps and, when the operator presses the box downwardly, completes the folding thereof. The box is then advanced along the horizontal portion l0 of the table with its end-wing extending downwardly in a position to be presented to the adhesive-applying mechanism G which, as illustrated in my prior application, consists of an adhesiveapplying roll and a pressure-applying roll between which the end-wing is passed. After the adhesive has been applied, the box is moved farther along the table to a folding mechanism, indicated generally by the reference character F, which engages the now coated end-wing and brings it into a position overlying the cornerlaps. Finally, the box passes to the pressureapplying means P which infolds the extension c of the end-wing over the edges of the cornerlaps and presses the superposed parts firmly into engagement to cause permanent adhesion between the parts of the set-up end structure of the box or of its cover. The folding mechanism F and the pressure-applying mechanism P are identical with that shown and described in my prior application and need not be further referred to in the present application.

The adhesive-applying mechanism G which forms the novel subject matter of the present invention is disposed below the table t, as is the adhesive-applying mechanism in my prior machine, and to permit ready access thereto the table t is mounted so that it may be tipped upwardly to expose the adhesive-applying mechanism. 'I'his is accomplished by hinging the rear edge of the table upon spaced brackets I4 (Figs. l and 4), the latter being connected by a web I6 ,which, in turn, is fastened to a horizontal bar by slot-and-screw connections I8. Attached to the underside of the table just inside of each of the brackets I4 is an angle 26 through which passes a rod 24 having at its outer extremity a crank arm 28 (Fig. 6). Fixed to the rod are two eccentrics 30 rotatable respectively in the two brackets I4. When the crank arm 2B is raised, the eccentrics are turned, thereby to draw the table suiciently to the rear to disengage latching mechanism (not shown herein) so that the table may be swung up and back about the axis of the rod 24 fully to clear the adhesive-applying mechanism. It is to be observed that a panel I3 is recessed into the table t above the adhesiveapplying mechanism and is removably fastened in place. This permits access to the adhesive-applying mechanism without lifting the table as a whole, if that is undesirable under operating conditions.

A horizontal bar 20 fastened to a vertical tubular column 22 (Fig.v l) supports the table t, the adhesive-applying mechanism G, and the folding mechanism F. The pressure-applying mechanism P is mounted on top of the column. The column, in turn, rises from a base which houses the driving means for the aforesaid mechanisms, the base not being shown herein since it is fully illustrated in my prior application.

As illustrated herein, the adhesive-applying mechanism consists, in general, of an adhesiveapplying roll 44 mounted in an adhesive container 32 for rotation about a vertical axis and is supported in this position by a block 'Il mounted adjacent thereto which serves as a bearing for the adhesive-applying roll. It is to be observed that the block I8 also constitutes a part of the meansfor supplying adhesive to the surface of the applying roll, pumping means Il (Fig. 4) being provided in the container for lifting adhesive from the container through a. passage Il formed in the block '18 to the top of the applying roll where it is discharged upon the surface of the adhesive-applying roll and allowed to descend by gravity over the surface thereof. A doctorblock 94 is provided for spreading the adhesive delivered to the surface of the applying roll and a pressure-applying roll |34 is provided for pressingl the end-wing against the adhesive-applying rol The adhesive container 32 (Fig. 4) is fastened to a projection 34 extending downwardly from the weh I5. To this end, a slot 36 (Fig. 6) is formed in the projection 34 for the reception of a key 38 (Fig. 4) which is screwed to one end of the container. A threaded stud 40 is formed integral with the key and extends outwardly through the slot 36 for the reception of a knurled nut 42 which. when .brought up against the projection by rotation on the stud, clamps the container to the extension. The container may, therefore, readily be attached to or removed from the projection 34 in case it is necessary to replenish the supply of adhesive or to clean the container.

'I'he adhesive-applying roll 44 (Figs. 4 and 7) is vertically positioned so that a portion of its surface lies substantially in the plane of the depending end-Wing (Fig. 7) as it is moved along the table or guide t, the upper end of the applying roll terminating close to the underside of the table and the lower end being submerged in the adhesive in the container, the level of the adhesive being maintained at about the'helght indicated by the dot-and-dash line l (Fig. 6). A hub 46 is provided at the lower end of the roll and is drivably connected to a hub 52 formed on a driven gear 54, submerged in the container, by a key 48 which iits into corresponding diametrical slots formed in the respective hubs. An axial bore 48 is provided at the bottom of the slot in the hub of the applying roll, in which there is seated behind the key a compression spring -EI which forces the upper end of the roll against a plate $2 adjacent to the upper end of the roll, thus preventing endwise movement of the roll. As shown herein, the upper end of the adhesiveapplying roll 44 is so close to the table or guide t that the customary bearing support has been omitted at that end of the roll because of the lack of space. Consequently, the roll may readily be removed from the container by depressing it against the compression spring so as to clear the plate 82 and then sliding the roll sidewise from the key 48.

During the application of the adhesive to the inside face ofthe end-wing, considerable lateral pressure is brought to bear upon the adhesiveapplying roll by the pressure-applying roll |34 which, as will appear hereinafter, is urged toward the surface of the applying roll by rela) tively stiff compression springs and is adjustable vith respect thereto to vary the pressure in accordance with the nature of .the work. As shown herein, the bearing block 18 takes up the thrust produced by the pressure-applying roll,

the bearing block 18 being fixed to supporting' means, as will appear hereinafter, and having a :oncave bearing surface consisting of spaced

lands

88, 82 arranged to engage the surface of the adhesive-applying roll at one side and the back thereof (Fig. As thus supported, the

adhesive-applying roll is held against the rearwardly directed pressure of the pressure-applying roll andthe sidewise pressure produced in the direction of the movement of the work by its passage between the pressure-applying and adhesive-applying rolls.

'I'he delivery of the adhesive to the surface of the adhesive-applying roll may conveniently be accomplished by providing a vertical passage 88` in the bearing block 18, the lower end of the passage terminating in the container and the upper end terminating at the top of the applying roll, and by pumping or lifting the adhesive from the container through the passage 88 to the top of the adhesive-applying roll where it is discharged onto the surface of the roll and allowed to deapplying roll but also to close the upper end of the passage 88 and the cross passage 88.

The circulation of the adhesive from the container through the

passages

88 and 88 is accomplished by the gear pump 8|, comprising the gear 54 which rotates the adhesive-applying roll 44, and a co-operating meshing gear 82, which drives the gear 54. 'I'he two gears are submerged in the container and during their rotation they pick up-adhesive from the container and displace it at their point of mesh in a direction laterally of their width. Advantage is taken of this by partially enclosing the gears, particularly adjacent to their meshing point, and terminating the lower end of the passage 88 that the displaced adhesive is forced upwardly through the passage. To this end, the gears are seated in lconnected recesses 55, 83 formed in the upper surface of a horizontal plate 58, the recesses being of a diameter closely to embrace the peripheries of the gears and of such depth that the upper surfaces of the gears are flush with the surface of the plate. It is to be observed that openings 58 and 85 are provided in the plate 58 to permit free access of the adhesive in the container to the recesses 55 and 83. these openings being formed at points remote from the point of mesh of the gears. To facilitate circulation, the lower end of the passage 88 is directly above the point of mesh4 of the gears so ly down the surface of the roll.

enlarged at 88 (Fig. 5) so that it overlies a substaiialportion of the gears near their point of me .The

gears

54 and 82. which constitute the pump for circulating the adhesive and also the drive for the adhesive-applying roll 44, are supported for rotation on

lupright studs

58 and 84 fastened to the bottoms of the recesses 55 and 83 in the plate 58. These gears .are driven by a gear 88 which meshes with the gear 82 and occupies the opening 85. This latter gear is pinned to the end of a vertical shaft 88 (Fig. 4) to the opposite end of which is fastened a pulley 12, the latter being driven from an outside source of power by a belt 14.

The plate 58 which houses the gears and supports the lower end of the applying roll 44 is 'bolted to a vertically disposed. forwardly extending D-shaped frame 18 which, in turn, is bolted to the web i8. The D-shaped frame also 'providesl the support for the bearing block 18 which is attached to its forward portion by screws 18 (Fig. 4) and is provided in its horizontal arms with bearings for rotatively supporting the vertical shaft 88.

To spread the adhesive after it has been supplied to the upper end of the roll, there is pron an additional bearing support for the adhesive-` applying roll. The doctor block 84 engages the adhesive-applying roll only at the doctor surface 88 and has a rearwardly extending notched web |88 which is hooked over the vertical rear corner |82 of the bearing block 18 and may be tilted about this corner as a fulcrum to and from the surface of the applying roll. Thus, the combined bearing block 18 and doctor block 84 substantially enclose the adhesive-applying roll except for a small portion at the front (Figs. 3 and 6) which is suiilcient for applying adhesive to the inner surface of the end-wing. As indicated, there is a clearance 88 between the adhesive-applying roll and the doctor block back of the doctor surface 88 which permits the adhesive supplied to the top of the adhesive-applying roll from the end of the cross passage 88 to run free- It is to be observed here that a helical thread 45 (Fig. 6) is cut on the surface of the adhesive-applying roll in such a direction that it tends to retard the fiow 4of the adhesivel downwardly over the surface of the roll. A pair of spring ngers |84 (Figs. 3 and 5) are fastened to the web |88 of the doctor block 84, the free ends of the spring fingers being held against abutments |88 formed on the D-shaped frame 18 by plates |88 overlying the fingers, the plates |88 being secured to the abutment's |88 by screws H8. This construction affords means for yieldably holding the doctor block 84 away from the surface of the adhesiveappiying roll, the spring fingers being flexed so that they tend to spring outwardly. In order to foibe the doctor block 84 toward the adhesive-applying roll and to adjust its position with respect thereto, a pair of screws ||2 having knurled heads ||4 are threaded through bosses ||8 formed at the ends of angle pieces H8 in such a the adhesive-applying roll.

position that the ends of the screws bear against the doctor block 84 in a direction substantially along a diameter of the adhesive-applying roll 44. The angle pieces ||8 are fastened to the abutments |08 by the screws ||0. It is evident that by rotation of the screws ||2 the doctor block may be moved about its fulcrum |02 against the opposition of the spring ngers |84. The doctor block 84 is also adjustable about a fulcrum ||8 (Fig. 6) which comprises a high point formed on the edge of the bearing block 18 midway between the ends so that the doctor block 94 may be tipped in a vertical plane to and from This permits alinement of the longitudinal surfaces of the roll-and the doctor surface 88.

While the doctor surface 88 provides for a uniform distribution of the adhesive over the surface of the adhesive-applying roll, not all the adhesive is picked up by the work as it is moved in contact therewith and some of this remaining adhesive tends to pile up as the surface of the roll moves toward the bearing surface 80 of the bearing block 18. AccordingLv. a clearance is provided at the ingoing side of the bearing block which permits the adhesive to pass inwardly to a retum recess |20 formed in the bearing block 18 close to the bearing surface 80 (Fig. 5). 4The surplus adhesive that piles up as the surface of the roll advances toward the edge of the bearing surface 80 will fill the recess |20 and descend therein by gravity to the bottom of the roll and into the adhesive container- 'I'he recess |20 not only carries away the excess adhesive but tends to make the film of adhesive on the surface of the roll more uniform, since there is no backing .up of the adhesive. Moreover, the recess encloses the adhesive while it runs back to the container so that there is little danger of the work coming into contact with it. The amount of adhesive delivered to the surface of the applying roll may also be controlled and regulated by a by-pass |82 provided in the passage 88 adjacent to the bottom thereof. As disclosed in Fig. 6, this by-pass |22 is formed in the bearing block 18 just above the level of the adhesive in the container and may be closed or opened by a slide plate |24 which is secured to the side of the bearing block by a screwand-slot connection |28. A horizontal tab |28 provides means for lifting or depressing the slide plate |24 to open or close the by-pass |22. It is to be observed that the lower portion of the slide plate |24 is curved butwardly and downwardly so that the gush of adhesive from the by-pass |22 will not spatter and will be directed into the adhesive container.

The doctor block 94, which carries the doctor surface 96, as heretofore described. is not fastened against vertical movement, and to prevent such movement, it is held against the cover plate 92, a portion of which projects over the end of thedoctor block, by a spring finger |80 fastened to the bottom end of -the doctor block. As seen in Fig. 4, the end of the spring finger rests against a portion of the D-shaped frame and forces the doctor block upwardly.

The pressure-applying roll |34 for holding the end-wing b against the exposed surface of the adhesive-applying roll is supDOrted by a vertical post |32, the latter being fixed at its lower epd to the horizontal plate 88 (Fig. 4). The upper portion of the post is reduced in cross section and has telescopically mounted thereon a sleeve |42. At the upper and lower ends of the sleeve parallel slots |4I (Fig. 5) are cut inthe surface thereof at opposite sides for the xecepticn of the arms of a pair of U-shaped clamps |48 which straddle the sleeve. Between the ends of the arms a yoke |88 is fastened. The yoke, in turn.

supports the ends of a spindle |88 upon which is mounted for free rotation the roll |84. 'Ihe sleeve |42 is retained heightwise with respect to the adhesive-applying roll by a screw |44 having a knurled head |48. A pair of compresa sion springs |48 are interposed between the sleeve |42 and the yoke |88 between the arms of the U-shaped clamps |48, the springs being seated in recesses |48 formed in the wall of the sleeve |42. By this means the yoke |88, and consequently the pressure-applying roll |84, is yieldably urged toward the adhesive-applying roll. A pair of screws |88 having knurled heads |82 are threaded through the rear portion of the U- shaped clamps |48 so that their ends bear against the sleeve |42, thereby providing means for adjusting the position o; the clamps relative to the sleeve |42. It is evident that by this construction the pressure-applying roll |84 may be adjusted to and from the surface of the adhesiveapplying roll and that in its adjusted position itis yieldable with respect to the adhesive-applying roll so that in case of an unusual thickness of material or the presence of some foreign matter the respective rolls will not be damaged. The. provision of the sleeve |42 and the clamp screw |48 permits the vertical position of the pressureapplying roll to be varied and also permits the pressure-applying roll readily to be swung about the post |82 so that access may be had to the surface of each of the rolls if it is necessary to examine them or to clean them.

Heretofore. it has been customary tov incorporate a heating element in the adheslvecon tainer or the adhesive-applying roll so that the adhesive could be maintained in a fluid condition during its application to the work.I As illustrated herein, the heating is accomplished by forming a circuitous passage |84 through the D-shaped frame 18, as shown in Fig. 4, through which a heating element |88 passes and to the terminal ends of which are connected lead wires |88. 'I'he heating element in its passage through the D-shaped frame runs along close to the bearing block 18 and thereby heats the block. The block 18, in turn, heats the adhesive-applying roll. Since the lower portion of the D-shaped frame is submerged in the adhesive, the adhesive in the container 82 is also heated. To control the heat supplied to the adhesive-applying roll, a thermostat |88 (Fig. 6) is inserted in a bore |82 formed in the D-shaped frame, appropriate leads |84 being provided for connecting the thermo-A stat to the switch (not shown) controlling the passage of current from the power lines to the lead wires |88.

In using the machine, comparatively few ad- I justments are necessary. The adhesive-applying roll and the adhesive container should first be brought to a constant temperature by supplying current to the heating means. Thereafter, the belt 14 may be shifted onto a driven pulley (not shown) to rotate the gears and the adhesiveapplying rolll and when the flow of adhesive becomes steady, it may then be increased or decreased by adjustment of the by-pass valve plate |24. The thickness of the coating carried by the` surface of the roll into contact with the end-wing may then be regulated by moving the doctor surface to or from the surface of the adhesive-applying roll, this being accomplished by rotation of the screws H2. Rotation of both the screws H2 an equal amount will move the doctor surface 96 radially to and from the ad-` by the screws |50. When the proper adjustments have been made, the operator picks up a boxblank b, folds the sides into parallelism, partially folds the comer-laps, places the folded cornerlaps against the curved portion Il of the table t, with the longitudinal axis of the box in a substantially vertical position, and advances the blank while held against the table toward the adhesive-applying mechanism, the end-wing extending vertically downward. During the passage of the end-wing between the adhesive-applying roll and the pressure-applying roll, adhesive is applied to the inner surface thereof, the thickness being determined by the previous adjustments. From the adhesive-applying mechanism the box is ad'vanced to the folding and pressure-applying mechanism.

Having described my invention, what I claim as new and desirg to secure by Letters Patent of the United States is:

1. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, the upper end of said roll being unsupported, and a block having an arcuate surface engaging the surface -of the roll and providing a support for the roll against laterally applied pressure, said block having a passage therein through which adhesive is delivered to the surface of the roll at its upper end.

2. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, the upper end of said roll being unsupported, a block adjacent to the roll, said block having an arcuate surface, and lands formed on said surface adapted to engage the surface of the roll and providing a support for the roll against laterally applied pressure,l said block having a passage therein through which adhesive is delivered from the container to'the surface of the roll at its upper end.

3. In a machine for applying adhesive to a box-blank, a container for an adhesive, an ad'- hesive-applying roll supported at its lower end in the container for rotation about a vertical axis, a block having an arcuate surface engaging the surface of the roll and providing a support for the roll against laterally applied pressure, said block having a passage therein through which adhesive is delivered to the surface of the.

roll at its upper end, and means for continually elevating glue through said passage.

4. In a machine for applying adhesive to a box-blank, a container for an adhesive, an adhesive-applying roll supported at its lower end in the container for rotation about a vertical axis, a block having an arcuate surface engaging the surface of the roll and providing a support for the roll against laterally appliednpressure, said block having a passage therein through which adhesive is delivered to the surface of the f roll at 'its upper end, and means for continually elevating glue through said passage, said means simultaneously rotating the adhesive-applying roll.

5. In avmachixiev for applying adhesive to a'boxblank. a container for an adhesive, an adhesiveapplying `roll supported at its lower end in thecontainer for rotation about a vertical axis, a gear pump in 'said container, one of the gears of said pump being arranged to rotate the adhesive-applying' roll', ablock having an arcuate surface engaging the surface of the roll and providing a support forthe roll against laterally applied pressure, and a passage in the block through which adhesive is delivered to the surface of the adhesiveapplying roll at its upper end, said gear pump being associated with said passage in a manner to lift adhesive through the passage to the top of the adhesive-applying roll.

6. In a machine for applying adhesive to a box-blank, a container for an adhesive, an adhesive-applying roll supported at its lower end'` in the .container for rotation about a vertical axis, a gear pump in said container and including a pair of meshing gears, one of which is driven,.means"drivab1y connecting one of said gears to the applying roll, and a block having an arcuate-surface'engaging the surface of the roll and providing a support for the roll against laterally applied pressure, said block having a passage therein through which adhesive is delivered to the surface of the roll at its upper end, the

lower end of the passage terminating adjacent to the delivery side of said pump whereby the adhesive displaced by the meshing gears is lifted through said passage.A

7. In a machine for applying adhesive to a box-blank, a container for an adhesive, an adhesive-applying roll supported at its lower end in the container for rotation about a vertical axis, a block arranged to engage the surface of the roll, said block having a passage therein through which adhesive is delivered to the surface of the roll at its upper end, means fastened to the block and overlying the upper end of the roll, and yieldable means bearing against the lower end of the roll to hold the upper end of the roll in engagement with the last-named means to prevent endwise movement thereof.

8. In a machine for applying adhesive to a bex-blank, a container for an adhesive, an adhesive-applyingmoll supported at its lower end in the container for rotation'about a vertical axis, a blockl arranged to engage the surface of the roll and providing a support for the roll against laterally applied pressure, said block having a passage therein through which adhesive is delivered to the surface of the roll at its upper end, there being a by-pass in said passage, and an adjustable valve member operable to vary the flow of the adhesive through the by-pass.

9; In almachine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end -in the container for rotation about a vertical axis, and a block having an arcuate surface engaging the surface of the roll and providing a support for the roll against laterally applied pressure, said block havl'ng a passage therein through which adhesive is delivered to the surface of the roll at its upper end and a recess in its arcuate surface adjacent to the edge thereof toward which the surface of the roll advances, said recess running trom top to bottom of the block.

10. In a machine for applying adhesive to boxblanks, a container for an adhesive. an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, and a block having an arcuate surface engaging the surface of the roll and providing a support for the roll against laterally applied pressure, said block havingV a passage therein through which adhesive is delivered to the surface of the roll at its upper end and a recess in its arcuate surface adjacent to the edge thereof toward which the surface of the roll advances, said arcuate surface being relieved from said edge inwardly to said recess and said recess running from top to bottom of the block.

11. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, and a block having an arcuate surface engaging the surface of the roll and providing a support for the roll against laterally applied pressure, said block having passages therein, one of said passages terminating at one end in the container and at its other end adjacent to the upper end of the roll, said other passage being connected at one end to the upper end of the rst passage and terminating at its other end adjacent to a portion of the surface of the roll moving away from the block.

12. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, a block partially surrounding the roll, said block having a surface engaging the roll at spaced points and providing a support for the roll against laterally applied pressure and having a passage therein through which adhesive is delivered to the surface of the roll at its upper end, and a doctor mounted adjacent to the roll between the point at which the adhesive is delivered to the surface of the roll and the edge of the block toward which the surface of the roll advances.

13. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, a block partially surrounding the roll, said block having a surface engaging the roll and providing a support for the roll against laterally applied pressure, there being a passage in the block through which adhesive is delivered to the surface of the roll at its upper end, a second block movably mounted upon the rst block, said second block having a. surface arranged to bear against the surface of the roll at a point in advance of the point of delivery of adhesive to the surface of the roll in the direction of rotation of the roll, and means arranged to vary the proximity of the surface of the block to the surface of the roll.

14. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, a block partially surrounding the roll, said block providing a support for the roll against laterally applied pressure, there being a passage in the block through which adhesive is delivered to the surface of theroll at its upper end, a second block movably mounted upon the ilrst block', said second block having a surface arranged to bear against the surface of the roll at a point in advance of the point of delivery of adhesive to the surface of the roll in the direction of rotation of the roll,'means for bodily moving the surface of the second block to and from the surface of the roll, and means for tilting the surface of the second block with respect to the surface of the roll about a horizontal axis midway between itsends.

15. In a machine for applying adhesive to boxblanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, a block partially surrounding the roll, said block having a surface engaging the roll and providing a support for the roll against laterally applied pressure, there being a passage in the block through which adhesive is delivered to the surface of the roll at its upper end, a second block fulcrumed on an edge of the rst block, yieldable means arranged to tilt the second block on its fulcrum away from the surface of the roll, and means for holding the second block in a predetermined position with respect to the surface of the roll.

16. In a machine for applying adhesive to boxl blanks, a container for an adhesive, an adhesiveapplying roll supported at its lower end in the container for rotation about a vertical axis, a block partially surrounding the roll, said block having a surface engaging the roll and providing a support for the roll against laterally applied pressure, there being a psige in the block through which adhesive is delivered tothe surface of the roll at its upper end, a second block supported upon an edge of the first block. said edge having a high point thereon, and means for tilting the second block about the high point on the edge of the first block to bring the surfaces of the second block and the roll into parallelism.

17.' In a machine for applying adhesive to boxblanks, a container for an adhesive, a vertical adhesive-applying roll one end of which dips into the container, a support submerged in the container, a recess in the support, a pair of meshing gears mounted for rotation in said recess, means drivably connecting one of said gears to the lower end of the roll, a block engaging the\ surface of the roll and providing a support for the roll against laterally applied pressure, there being openings in the recess exposing a portion of the teeth of each gear to the adhesive in the container, and means for rotating the gears whereby adhesive picked up by the exposed teeth is carried to their point of mesh and displaced laterally, there being a passage in the block the lower end of which terminates closeto the point of mesh of the gears and the upper end of which terminates at the upper end of the roll, said laterally displaced adhesive being elevated through y said passage by the rotation of the gears.

18. In a machine for applying adhesive to boxblanks, a container for adhesive, an adhesive applying roll rotatable in the container about a vertical axis, and a block having an arcuate surface engaging the surface of the roll and pro-r viding a support for said roll against laterally applied pressure, the block having a passage through which adhesive is delivered to the roll.

CUTLER D. KNOWLTON.

CERTIFICATE oF CORRECTION. Patent No. 2,552,720. July LI, 19141;.

. CUTLER D. RNowLToN.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page l, first column, line 18, for the word "herein" read --therein; and thalt the said Letters Patent should be read with this correction therein that the same may Conform to the record of the case in the Patent Office. Signed andsealed this 22nd day o August, A. D. 19h14.

Leslie Frazer `(Seel). v y Acting Commissioner of Patents.