US2893191A

US2893191A - Cutting and gluing means for paper strip

Info

Publication number: US2893191A
Application number: US606435A
Authority: US
Inventors: Arthur W Lancaster
Original assignee: Williams & Wilson Ltd
Current assignee: Williams & Wilson Ltd
Priority date: 1956-08-27
Filing date: 1956-08-27
Publication date: 1959-07-07
Anticipated expiration: 1976-07-07

Description

1959 A. w. LANCASTER 2,393,191

CUTTING AND GLUING MEANS FORPAPER STRIP 8 Sheets-Sheet 1 Filed Aug. 27, 1956 yaw/6L /i Z/ lo FROM ROLL 14d 14b FIG. I

------ END BAND 5O Inventor ARTHUR WESLEY LANCASTER By: 9

Att'ys July 7, 1959 CUTTING AND GLUING MEANS FOR PAPER STRIP Filed Aug 27, 1956 8 Sheets-Sheet 2 ma v FIG. 3

Inventor ARTHUR WESLEY LANCASTER l I. 1 I l 0 Att'ys y 7, 9 A. w. LANCASTER 2,893,191

' CUTTING AND GLUING MEANS FOR PAPER STRIP Filed Aug. 27, 1956 8 Sheets-Sheet 3 Inventor ARTHUR WESLEY LANCASTER By: WZ 4 4% Att 'ys July 7, 1959 A. w. LANCASTER CUTTING AND GLUING MEANS FOR PAPER STRIP Filed Aug. 27, 1956 8 Sheets-Sheet 4 FIG. 6

' Inventor ARTHUR WESLEY LANCASTER Att ys July 7, 1959 A. w. LANCASTER 2,893,191

CUTTING AND cwmc MEANS FOR PAPER STRIP FiledAug. 27, 1956 s Sheets-Sheet s FIGJO Inventor ARTHUR WESLEY LANCASTER By: I

Att ys July 7, 1959 A. w. LANCASTER CUTTING AND GLUING MEANS FOR PAPER STRIP Filed Aug. 27. 1956 8 Sheets-Sheet 7 FIG. ll

FIG. Ila

y 195.9 A. w. LANCASTER 2,893,191

' CUTTING AND cwmc MEANS FOR PAPER STRIP Filed Aug. 27, 1956 8 Sheets-Sheet 8 FIG.I2

Inventor ARTHUR WESLEY LANCASTER By W %9 Att'ys a e P m CUTTING AND GLUING For:

PAPER STRIP Arthur W. Lancaster, Orillia, Ontario, Canada, assignor, by mesne assignments, to Williams & Wilson Limited, Montreal, Quebec, Canada Application August 27, 1956, Serial No. 606,435

15 Claims. (Cl. 53-380) This invention relates to a roll wrapping machine and improvements therein. By a roll I mean any cylindrical object to be Wrapped in paper, but the invention is particularly applicable to rolls of paper to be so wrapped.

A machine for wrapping rolls supplies a strip of paper and means to wrap it around the roll and to fix it in position when so wrapped. Means are provided to sever the lengths of strip for wrapping various rolls and for supplying glue to the strips for fastening the strips to and about the roll. Means are also provided for reinforcing the edges of the strip.

Since the strip must be of varying widths to wrap rolls of varying lengths, the invention provides overlapping rolls adapted to supply an overlapping strip for wrapping with the width determined by the overlap which in turn depends on the position of the rolls.

Such variable width strip must be reinforced at its edges whatever the width and therefore the reinforcing material, known as edge-bands is supplied by rolls adapted to move axially to supply the edge bands to the strip, Whatever width is used.

When glue is supplied to the strip lengths for attaching them to and about the roll to be wrapped, the glue location bears a definite relation to the edges of the strip. Therefore glue supply actuation means are provided which vary the glue location in accord with the strip width used. v

Since the strip width therefore bears a similar relation to: e

(1) The position of the overlapping rolls. (2) The position of the edge-band rolls.

(3) The position of the glue gun actuating means there are means provided whereby all these elements, or any two of them may be simultaneously adjusted for use with a particular strip width.

The Wrapping machine and improvements are shown in the attached drawings in which:

Figure 1 shows a schematic illustration of the operation of a paper machine.

Figures 2 to 4 illustrate the adaptability of the invention to wrap a roll of varying widths.

Figure 5 illustrates in perspective the means for varying the roll wrapping.

Figure 6 illustrates the gluing and cutting means in place on the machine.

Figure 7 illustrates in vertical cross section the cutting and gluing means.

Figure 8 illustrates a flexible connection for the cutting and gluing means.

Figure 9 illustrates the glue pattern for a strip in accordance with the invention.

Figure 10 illustrates thestrip used with the invention.

Figure 11 illustrates in perspective the mounting for the edge bands; Figure 11a shows a detail of such construction. a

Figure 12 illustrates schematically the relationship of the width controls for the wrapping rolls, the edge bands and the'gluing controls. 1

The overall operation of the machine may be generally understood by a reference to Figure l.

A cabinet schematically shown at 10 supports a series of

rolls

12, 14a, 14b of wrapping paper adapted to supply the Wrapping paper strip 16 to wrap a roll 18 as shown at the bottom of the machine; the roll 18 resting on and being rotated by a pair of

drive rollers

20 and 22.

-The wrapping paper strip is hereinafter referred to as the wrapping strip 16 or as the strip 16 to distinguish it from the roll of paper or other material 18 to be wrapped. For the purposes of this application it is sufiicient if the paper 18 is considered as any cylindrical body to be wrapped.

The paper supplied (say) by roll 12 is led over a guide roller 26 about a driven roller 28 and between a pair of horizontally disposed

puller rollers

30 and 32. The horizontally disposed puller rollers provide a vertical path for the strip into guide means 80 where the cutting and gluing is performed as will be described hereinafter, by means shown here schematically as 36 but shown in detail in Figure 6.

After the necessary glue is applied and the paper is cut as will be hereinafter described, the paper length is supplied between press roll 38 and the roll 18 under the assistance of any suitable guide means such as those schematically shown at 40. Paper supplied to the roll is kept from hanging freely after the cutting operation by the tensioning means 99A. i

The roll to be wrapped is rotated under the impulsion of

drive rollers

20 and 22.

The leading end of a length of a glued strip 16 is caught between the press roll 38 and the roll to be wrapped 18 and the press roll pressure attaches the strip end to roll 18 where it is pulled around with that roll. When the length of the strip 16 from the end initially stuck to roll 18 to the location of the cutting means is suificient to supply the requisite number of wrapping turns, the wrapping movement of strip 16 is halted by stopping

puller rollers

30 and 32 and drive

rollers

20 and 22, and the cutting and gluing means 36 cuts off the Wrapping length. The movement of the drive rolls is then recommended until the cut end of the first length of strip 16 is wound on the roll 18.

Glue for attaching the beginning and end of the length is applied by suitable means forming part of means 36. It should be noted that the drive means for puller rolls 30 and 32 and for drive rolls 20 and 22 are driven at a speed to ensure the travel of paper therethrough at approximately the same rate. It is possible, but has not been found necessary, to exactly synchronize these rollers.

As illustrated in Figure 10 the wrapping paper strip 16 must be not only wide enough to provide a portion 43 to cover the roll 18 to be wrapped but must also be wide enough to supply an extension 44 and 46 on each side for crimping over each end thereof.

Crimping means 146 to crimp the over-extending portions 44 and 46 of the strip 16' on to the ends of the rolls 18, are provided as illustrated at each end of the roll.

To protect the corners at the ends of rolls 18 from damage in handling, reinforcing strips known as edgebands 48 and 50 are attached to each side of the strip 16 for reinforcement purposes. These bands are carried on band rolls such as those shown at 52 and glue is sprayed on them as shown schematically at 54 before application to the strip 16 at the

pullers

30 and 32.

As stated above (see Figures 2, 3, 4 and 12), for the normal size of roll wrapped in any mill, the wrapping paper on roll number 12 will supply the necessary width for Wrapping and crimping. However, from time to time other sizes of rolls will require to be wrapped and it has heretofore been the practice with such machines to place in a series of rolls extending backward from the machine as many sizes as are necessary to perform the wrapping. This has, however, been disadvantageous since the changeover from one roll size to another-has required the removal of the strip of the width being previously used and the threading through of the new roll to-be used. This operation is a laborious one.

The normal paper size for any mill will therefore be supplied by strip from roll 12 which is of the normal width for such wrapping. However, for variants from such width, rolls 14a and 14b will be used. It will be obvious that for the changeover from roll 12, the strip 16 extending from roll 12 must be removed, and strips 16a and 16b from

rolls

14a and 14b threaded into position. Thus some removal and threading is necessary. However, it will be seen from Figures 2 to 4 that a wide range of widths is possible with

rolls

14a and 14b so that in a sequence of wrappings of different widths a much smaller number of rethreadings is necessary.

It may also be pointed out that other pairs of rollers similar to 14a and 14b may be provided if other ranges are necessary.

Roll 14a is threaded over a guide roller 60 about drive roller 28 and between puller rollers 30 and 32 (see Figure 1).

Roll 14b is threaded over guide rollers 62 and 64 and directly between puller rollers 30 and 32 (see Figure 1).

To one of theoverlapping strips 16a or 16b glue must be supplied on the overlap portion thereof so that a composite strip is formed as the strip goes through the puller rolls 30 and 32. The glue may be supplied at any con venient location to one of the strips, such as at 68 (see Figure l).

Referring now to Figures 3 and 4 it will be seen that rolls 14a and 14b may be combined in various spacings to supply at rolls 3t) and 32 a unitary wrapping strip 16 of variable width. Each

roll

14a, 14b is pivotally mounted on a carriage 70 (Figure 5) which is supported on the cabinet as hereinafter described. Angle irons attached to the top of the cabinet at the forward and rearward end thereof provide a respective horizontal rolling surface 72 for wheels 74 on each carriage 70 for movement in a direction parallel to the axis of the strip roll 14m or 14b. Intermediate the two angle irons 72 a rail 76 is provided adapted to receive four grooved wheels 78, two being pivotally mounted on each carriage and such wheels 78 for each carriage being designed to ride on the rail. In the case of each such carriage the wheel-rail cooperation maintains the carriage in position. As seen in Figures 2 to 4,- the wheels 78 for the respective carriages alternate along rail 76 to provide for the strip overlap. Thus either respective roller and carriage assembly may be moved axially by movement of the wheel 78 while lateral movement of the carriages 70 is prevented by the cooperation between the grooved wheels 78 and the guide rail 76. The relative location of the two carriages 70 determines the width of, or the amount of overlap of strips 14a and-14b controlling the width of the resulting wrapping strip 16. The relative location of the carriages 70 is controlled by a lead screw 8000 running longitudinally beneath the central rail 76 and cooperating with a worm tooth 82w attached respectively to each of the carriages. A circular tube 85 acting as the base for the mounting rail 76 forms a housing for lead screw 80a. The lead screw 80a is divided longitudinally into two threads 81a, 83a having opposite sense so that a rotation thereof in'on'e direction causes the teeth 82a to draw carriages 70 together and rotation thereof in the opposite direction causes their separation. The overlap and therefore the width of the composite strip 16 provided may therefore be controlled. i

The composite strip 16 complete with edgebands issuing from the press rolls must be cut to the proper wrappinglength which usually has a length suflicient to place about 2 turns on the roll to be wrapped. This length J tending laterally with respect to the direction of move-.

must be cut from the strip 16 and must be supplied with a lateral strip of glue at the start and end of any wrapping length.

The gluing has heretofore been performed by a series of glue guns spaced in a lateral line across the path of the strip 16. Supplying and keeping operative such a series of guns has been both expensive and inconvenient.

There is therefore provided means whereby such gluing may be accomplished by a single glue gun spraying a location on the strip 16 and spraying as it goes to produce a glue strip.

There is also provided a means whereby such gluing may be accomplished by a pair of glue guns longitudinally displaced along the strip, the lower of said glue guns being adapted to glue the finish strip for attaching the end of a length of strip 16 to the end of a roll to be wrapped, such gluing preferably being applied during travel of such guns in one direction and the upper of said guns being adapted to glue the start strip for attaching the beginning of a length a new roll to be wrapped preferably during travel of said guns in the other direction.

The cutting of such strip lengths has heretofore been performed by a blade or blades extending across the stripfSuch blades, partially due to their length and to the difiiculty of obtaining even operation over such extent have not given good performance.

It is an object of this invention to provide a cutter which cuts only in a certain location in the lateral extent across the strip 16 and which severs the strip by moving laterally from side to side across it.

It is a specific object of this invention to provide a glue gun-cutter unit which reciprocates across the strip to perform the above cutting and gluing operations.

Reference to Figure 6 and particularly Figure 7 will indicate the location of the composite strip 16 as it passes down the front of the cabinet. A guide plate rigidly attached to and spaced from the cabinet 9. distance sufficient to allow passage of the strip 16 therebetween forms a guide for such strip. Projecting rigidly horizontally from the plate 80 away from the strip 16 is a shelf 82 extending the width of the strip 16. Rigidly projecting upwardly and downwardly from the outer extremity of the shelf are

rails

86 and 88.

A carriage 90 mounted for movement back and forth across the width of the strip 16 is supplied with two upper and two lower wheels for cooperation with the upper and

lower rails

86 and 88 and the carriage 90 carries the cutting and gluing means which comprise the rotary cutter and glue guns '94 and 96 adapted to spray locations above and below such rotary cutter 100. The front of the cabinet adjacent the cutting location, known as the apron 91, is provided with an inset wooden beam 97 exment of the strip 16 containing a slot 98 slanted upwardly and away from the strip to receive the rotary cutting blade 100 which intersects the plane of the strip 16 and which cuts paper strip 16 in its travel laterally thereacross. Cutting blade is rotatable on axis 102 for rotation by an electric motor 104 mounted on the carriage 90.

The carriage is controlled in its movement across the width of strip 16 by a chain 106 suspended on sprockets 108 (one only shown). The sprocket 108 is then actuated in response to control, manual or automatic, to move the carriage 90 from one side to the other to perform the gluing and cutting operations.

The operation of

glue guns

94 and 96 by means of air and glue control and supply is well known and it is not felt necessary to describe it here. However, a problem was encountered in the maintenance of flexible connections for the glue, air and electrical connections to the carriage and the method of overcoming such problem is illustrated. The four

connections

112, 114, 116, 118

- which comprise two glue connections 11-2, 114, one air riage are supported by hori'zfontal'bars 120 which structurally connect a'pair of link chains "122, 124,the con: nection and the chains extending from the fixed end 127 =of the connections on the cabinet along the shelf 82 and upward to the upper extremity of the carriage 90. The :link chain 122, 124 is provided with members 126 pivotally mounted on each of the chain pivots and extending away from the upper portion'ofthe carriage 90, each member 126 terminating in -a pair'of flat surfaces 128 directed longitudinally with respect to said chain 122, 124, adaptedto abut with the faces 128 of adjacent elements 126. These faces 128 are adjusted to abut when the chain 122, 124 is extending in a straight line and thus prevent bending of the" chain in one direction, that is in a direction convex with respect to the upper half of the carriage. The elements 126, however, do not prevent bending in a direction concave with respect to the upper portion of the carriage and therefore allow the bending of the chain 122', 124 as'shown in Figure 8. The chain 122, 124 thus extends in a straight line from the movable connection 125 and at'the bottom in a straight line from the fixed connection: 127." These straight lines are joined by a semicircular arc130 in each chain 122, 124 the "semicircular shapeibeing maintained by solid web sprocket wheels 181 in each chain. As the-carriage 90 moves to the left or right, the carriage end of the connection 125 moves, but due to the elements 126 preventing collapse there is also always a length of chain 122, 124 extending as a'beam from the movable connections 125, while the joining curve 130 to the lower fixed connections 127, although it encompasses a difierent set of lengths as the carriage moves, always takes the approximate form of a semicircle as the sprockets 131 roll to conform to the movement of the chain. With the proper length of chain connection a secure flexible connection is provided, adapted for movement of the carriage 90 from one side to the other of the strip 16.

The carriage 90 movable from one side to the other must be adapted to perform three functions: (a) it must be adapted to make the out which severs the length of strip 16 to be wrapped on the roll 18 at present on the machine from the start of the next length; (b) it must supply a glue strip across the end of the length severed for aflixing this end to the wrapped'roll; and (c) it must supply glue to the start of the new length for attachment for wrapping to a new roll to the'supplied. These functions are respectively performed by the rotary cutter 100, the lower gluing gun 96 and the upper gluing gun 94. These three functions are also performed in the travel of the carriage 90 once across and once back across the strip face. The glue and air supply is so designed that the lower gun 96 is actuable during travel in one direction, e.g. to the left, and the upper glue gun 94 is actuable by travel in the'other direction, e.g. to the right. In the actuable travel of a gun a gun switching means controls the length of the glue strip applied, which length is determined by the width of the strip 16 used as a wrapping, and therefore this is performed by four adjustable cam plates 99 (Figure 12)"at each end of the roll which contain

guide cams

103 and 113 for cooperation with glue gun switch 107 and guide earn 105 and 115 for cooperation with glue gun switch 109 (Figures 12 and 6) the glue'gun switches 107, 109 operating respectively upper and lower glueguns 94 and 96. It will be seen by reference to the cam plates 99 that the limit switch controlling each gun is removed. to one position at each end of the carriage travel, which-is the Off position and between these positions the glue gun switches are in the On position. However, since the air and glue supply for each gun is independently controlled (not shown) so that only one glue gun is actuable in travel in one direction, the actuation of both guns to the On position only takes effect on one of tlje-upper'or the lower-glueguns on travel in any one 6 direction. With a strip of paper 16 as shown, the calriagecontaining the

glue guns

94 and 96 and rotary cutting blade 100 may be considered as initially located to the left-hand side of the strip 16 and on a manual or automatic control signal is moved by the actuating chain 106 toward the right.

Since the cam plate spacing operating the glue guns varies with the width of the strip, and of the roll to be wrapped and therefore with the overlap of

rolls

14a, 14b and with the edge-band roll spacing, it is desirable that the cam plates and roll carriages for overlapping wrapping strip and edge-band rolls be adjustable under a single control. It will be obvious that the glue apparatus as set out may be used with a different cutting apparatus or vice versa.

There is therefore provided apparatus wherein the overlapping wrapper strip carriages are mechanically connected to the edge band roll carriages in such a way that the setting of a desired composite strip width by setting a certain overlap of the overlapping rolls sets the edge band rolls to the necessary spacing to place the edge bands on such strip.

- There is therefore provided apparatus wherein the over lapping wrapper rolls are mechanically connected to the glue gun controlling cam plates in such a way that the setting of the overlapping rolls to a desired composite strip width causes a corresponding spacing and location of the cam plates.

It is also an object of this invention to provide apparatus wherein the setting of the cam plate spacing to glue a given wrapper roll strip width controls the edge band spacing.

Referring now to Figure 11, the edge-band rolls 52 are mounted on hand carriages which are in turn mounted on cabinet 10 in the location shown in Figure l in the following manner: bearings 152 at each side of the cabinet mount a worm thread 154 pivotally extending between them. Rigidly connected to the cabinet and encasing the worm thread 154 is a hollow tube 156 slotted longitudinally at 157 along the upper portion of the tube wall.

To the front of the worm construction referred to above is a structural beam 158 extending laterally across the cabineti.e. parallelto the worm thread 154'. Carriage 150 comprises roll support plates 160 rigidly connected. The support plates 160 are provided with a tooth 162 extending downwardly through longitudinal slot 157 to ride in and be urged by the threading of worm 154. A pair of rollers 164 (Figure 11a) are so mounted that one roller 164 surface contacts the upper outside wall of tube 156 to one side of the top and the other roller surface contacts the outside wall of tube 156 on the other side of the top. The axes of both rollers 164 are oriented perpendicularly to the axis of the tube so that the rollers 164 roll up and down longitudinally on the surface of the tube.

A pair of rollers 164 is provided at each end of and forms the main support for the carriage 150. The re mainder of the support means, which prevents tipping of the carriage in either direction will now be discussed.

Structural beam 158 is provided with an upper surface 166 running transversely of the cabinet, i.e. along the beam. Extending forwardly from and rigidly connected to the roll carriage are a pair of spaced arms 168 which extend to the very front of the machine for a purpose to be described hereafter.

However, mounted on each arm 168 is a roller 170 pivotal about its axis which is perpendicular to the beam 158, and arranged to roll on the surface 166 of beam 168. Thus rollers 170 support the carriage against tipping forwardly. v

Carriage 150 is also provided with rigid extensions 172 which extend forwardly, below and just clear of, the beam 158. In case of a very slight rearward tilting of carriage tipping of the carriage.

At the forward extremity of the cabinet is provided a pair "of parallel angle irons 180 rigidly attached to and extending" across.the cabinet 10. The angle irons 180. each have 'one of their flanges 182 vertical and the other flanges 184 projecting toward one another from the upper end of their respective vertical flanges182.

Cross members 186 attached to the inside surface of each of vertical flanges 182 are provided with inwardly facing grooves 188. Four cam plates 99 extend between grooves 188 and ride therein. The cam plates 99 are also shown in Figure 6 with opposite edges mounted and slidable in the grooves 188 shown -in Figure 11 for movement transversely of the wrapping strip.

A pair of blocks 190 on the upper surface of each cam plate 99 (i.e. the opposite side from the cam surfaces) define between them a groove in which a connecting bar 194 is slidable.

The cam

plates carrying cams

103 and 115 have the blocks 190 thereon so arranged that a single connecting bar 194 lies in both grooves. When the cam plates have individually been moved to their desired location on the connector bar 194 they are fixed in positoin relative to the bar by'any suitable means such as by set screws 195 in the blocks 190.

Similarly the cam

plates carrying cams

105 and 113 have a similar construction whereby they are connected to a second connecting bar 194 in front of the opposite edge band roll.

Spaced arms 168 which extend from the roller carriage to the front of the machine as illustrated in Figure 11 are rigidly joined by a connecting member 196. Rigidly projecting therefrom just above the angle irons 180 is a bar 198. A pair of brackets 200 rigidly attached to each connector bar 194 provide a pair of upstanding flanges, which define a socket through which bar 198 extends. Movement of the bar 198 in a vertical plane due to small incidental tipping movements of the edge band carriage is free to take place relative to the connector bars and cam plates since the bar 198 is freely slidable vertically between the brackets 200. I a I On the other hand transverse movement of the brackets 200 has the effect of moving the connector bar 194 to the right or left causing cam plates 99 attached thereto to slide in their grooves 188. This movement of the edge band carriages toward or away from one another has the effect of moving the pair of cam plates 99 attached to one connector bar 194 toward or away from the pair attached to the connector bar 194 at the opposite side of the machine. Thus movement of the edge band rolls '52 to correspond to the width of various strips moves the cam plates to correspond to the strip width. The individual adjustment of the cam plates 99 on their respective slide bar 194 is attained by loosening set-screws 195 and moving the cam plates relative to the bar then tightening the screw to fix the cam plates in position. I

Thereafter movement of the edge band carriage 150 achieves a corresponding movement in the cam plates 99; Since, as illustrated in Figure 9, the distance between the triggering of a glue gun and its operation is substantially constantthe locations of the cam plates 99 will be constant relative to the location of the wrapping strip. Thus once adjusted, movement of the cam' plates 99 coextensively with movement of the edge bands 50 will produce the necessary glue gun pattern for each paper width.

Moreover, it will be noted that the spacing between the on cam plate 99 for the preliminary pattern and the off cam plate 99 for the final pattern, iLe. between the lines A and D in Figure 9 is a constant as is the distance between the corresponding pair of cam plates 99 indicated on Figure 9 as the distance between the lines B and C. Therefore it willbe seen that when properly located each pair of cam plates 99 on one side of the strip may be rigidly attached to a single connecting bar I94 and to move together with the corresponding edge band carriage. w

the actuationof worm gear 79. The shafts of worm gears 79 and 154 are'therefore mechanically rotatably linked-such as by a belt and sheave arrangement 206, and one of the shafts is operated manually or by a source of power such as the ;motor 208.

It will be noted in Figure 1 1 that the forward extremity of the bar 198 is provided with a downwardly extending pointer 212jand that the forward surface of the angle iron is provided with a scale 210. A similar scale and pointer are provided at the other side of the wrapping machine (not shown). The scales are calibrated to indicate the various edge bandand wrapping roll locations for a strip of various widths.

Thus for a given width of roll to be wrapped, the proper manual or motor, adjustment is made to achieve the proper spacing for cam plates 99,

edge bands

48, 52 and

overlappingrolls

14a and 14b. If, instead of the overlapping rolls a single .roll 12 is used, then the scale setting provided with any other controllable transverse movement such as. connection instead to the roll carriages 79, will only indicate the cam plate and edge band position as the overlapping rollers are not used. The overalloperation of the device is as follows: a composite strip 16 of wrapping paper formed either from roll 12. or .both

rolls

14a and 14b and provided with edge bands extends down to the cutting area and the carriage is located to the left of the machine. Travel of the carriage to the right supplies a strip of glue for attachment of the wrapping paper to the roll 18. The strip of paper 16 then under the actuation of the puller rolls drops down and is guided by guide means into contact with the roll to be wrapped where it is attached by the cooperation of the press roll 38 and the glue. The contact with the .glue applied is sufficient to retain the paper until it :is rotated with the roll between the roll tobe wrapped and the drive rollers. The length of strip is pulled through until there has passed the cutting means a sufiicient length to wrap the first roll, the gluing and cutting carriage '36 then being located at the right. The drive and puller rollers then stop and the gluing and cutting carriage moves from right to left, the lower glue gun supplying the strip of glue to attach the strip to-the roll and to the already crimped and wrapped paper while the cutting means severs the length. The drive rolls 20 and 22 are then restarted to complete the wrapping of theroll in question. When the cycle is repeated the carriage again travels from left to right supplying a glue strip for starting the wrapping of the next roll. In the short interval before the drive rolls operate to complete the Wrapping the severed length end adjacent the cutting area is retained from flopping loosely over the apparatus by the guide means 99 (Figure 1). During the operation of the drive rollers the crimpers are moved into contact with the overextending portion of the strip .16 by the hydraulic means. During the addition or removal of the rolls to be wrapped the crimpers are retracted by such hydraulic means.

To adjust for a different width the manual or motor actuating means are operated until scale 210 and pointer 212 indicate the desired strip width. The corresponding movement of carriages 70 and results in the correct overlap of

rollers

14a and 14b and in the correct positioning of the -edge bands. The movement of carriage 150 sets the proper position of the glue gun actuating cam plates 99 (Figure 11).

What .-I-c-laim as my invention is:

1. l-n a roll wrapping =-machine, means for fielding a wrapping paper supply strip having a width not only to extend across the axial length of atoll to be wrap ed but also to? provide. areas for crimping on each end of said roll, a track parallel to the plane of said strip, a;car'riage.movable'on said track, a pair of vertically spaced glue guns, each adapted to spray corresponding longitudinally disposed locations on said strip and a rotary cutter adapted to cut in the plane of the paper longitudinally between said locations, flexible air and electrical connections to saidcarriage, a flexible glue connection to each gun, means for reciprocating said carriage on said track and means for actuating and deactuating saidglu'e guns. a t

2. In a roll Wrapping machine: means for feeding a strip of'paper for wrapping a roll having a width not only to 'cover the axial length of the roll to be Wrapped but also to provide crimpable portions for each end of said roll-and a supporting cabinet for said strip, the feedingof said strip defining a moving direction, glue spray means for supplying glue to a location on said strip corresponding to the location of said spray means and means for moving said glue spray means to different locations in a direction which is both parallel to said strip and laterally with respect to said moving direction and actuating means for moving said gluing means from one side to the other of said strip in said lateral direction.

3. Means for feeding a strip of paper for wrapping a roll having a width not only to cover the axial length of the roll to be wrapped but also to provide crimpable portions for each end of said roll, a supporting cabinet for said strip feeding means, said strip feeding means defining a moving direction, a respective pair of glue spray means for applying glue to a pair of locations, corresponding to the locations of said respective spray means spaced in said moving direction on said strip and means for moving said glue spray means to different locations parallel to the plane of said strip but at right angles to said gluing direction.

4. In a paper roll wrapping machine mounting means for moving wrapping strip defining a moving direction; an upper and a lower glue gun for applying glue to respective pair of locations spaced in said moving direction and cutting means adapted to cut such strip between said locations, means for moving said glue guns and said cutting means as a unit from one side to the other of such strip said upper glue gun being energizable on movement in one direction and non-energizable in movement in the other direction, and said lower glue gun being energizable on movement in one direction and nonenergizable on movement in said other direction and means for energizing the energizable gun during a selected portion of travel in either direction.

5. A device as claimed in claim 4 wherein said strip cutting means is mounted on a carriage and said carriage is mounted to move on rails extending laterally with respect to said moving direction and parallel to said strip.

6. A device as claimed in claim 5 wherein said carriage is provided with flexible glue and air connections to said glue gun comprising a chain bendable out of straight line in one direction only, extending horizontally and supported from one side of the carriage path laterally of said carriage and curved back in the bendable direction to contact said carriage, said flexible glue and air connections being supported between said lengths.

7. A flexible connection for a carriage and supporting means therefor reciprocally movable on a line relative to said supporting means comprising conduits extending parallel to said line in one direction from the support and being curved at their support-remote extremity to extend to a movable carriage parallel to said line in the opposite direction, to similar link chains supporting said conduits, with links pivotal about an axis perpendicular to said direction, members projecting outwardly from said link chain with respect to the curve therein and abutting faces on said members adapted to prevent curvature of said chain in the opposite direction.

8. In a roll wrapping machine having means for plying Wrapping strip: a supporting cabinet for said strip,

said strip supplying means being adapted to provide strip for d-itferent'widths of rolls comprising: a means for rotatably supporting a pair of rolls of strip adapted to supply strip in such overlapping relation that such over overlap to control the composite width of the wrappingpaper, said strip defining a moving direction, glue spray means for supplying glue to an area of said strip andv means for moving said glue spray means in a direction which is both parallel to said strip and laterally with respect to said moving direction and actuating means for moving said gluing means from one side to the other of said strip in said lateral direction.

9. In a roll wrapping machine as claimed in claim 4 wherein means are also provided for supplying strip of varying widths comprising means for mounting a pair of rolls of strip adapted to supply strip in overlapping relation, gluing means for attaching said two strips in the overlapping region and means for controlling the relative amount of overlap to control the composite width of the wrapping paper and means controlling the energization locations for the glue guns in accord with the overlap of said rolls.

10. In a roll wrapping machine as claimed in claim 4 wherein a pair of rolls is provided adapted to supply reinforcing paper bands to the edges of such strip means for attaching said bands to such strip, axially movable carriages supporting rolls supplying said bands.

11. In a roll Wrapping machine as claimed in claim 10 wherein said glue gun energization locations are movable in conjunction with the movement of said edge band carriages.

12. In a roll wrapping machine: means for supplying wrapping strip, means for applying such strip to a roll to be wrapped, means for providing strip for diiferent Widths of rolls, comprising: a pair of carriages for mounting a pair of rolls of strip movable axially with respect to said rolls, said axial movement being controlled by a worm thread extending axially with respect to said rolls and a tooth attached to each of said carriages for cooperation with said thread whereby the relative amount of overlap of such two strips may be controlled, a pair of rolls adapted to supply reinforcing paper bands to the edges of said composite width, axially movable carriages supporting rolls supplying said bands wherein said movement is controlled by a worm thread extending axially with respect to said rolls and a tooth attached to each of said carriages for cooperation with said thread, means for connecting said strip roll worm thread for rotation with said edge band roll worm thread whereby the axial displacement of said edge band rolls corresponds to the axial displacement of said overlapping rolls.

13. In a machine for wrapping rolls having means for supplying a Wrapping strip, means for wrapping it around the roll and fixing it in position when so wrapped: means for severing lengths of strip, means for supplying glue to such strips for attachment to such roll and to the strip itself and means for reinforcing the edges of said strip and wherein said attachment glue is supplied from at least one glue gun movable transversely across the face of said strip, means for energizing said gun at predetermined transverse locations relative to said strip edges and means for altering said energization location to conform to said varying strip widths.

14. In a machine for wrapping rolls having means for supplying a Wrapping strip, means for wrapping it around the roll and fixing it in position when so wrapped: means for severing lengths of strip, means for supplying glue to such strips for attachment to such roll and to the strip itself and means for reinforcing the edges of said strip;-

11 said strip being of a composite type provided by two overlapping strips supplied from supply rolls, said rolls being movable to vary the amount of overlap; said attachrnentglue beingsupplied from at least one glue gun movable transversely across the face of said strip, means forenergizing said gun at predetermined transverse locations relative to said strip edges and means for altering said energization location to conform to said varying strip widths,

15. In a machine for wrapping rolls having means for supplying a wrapping strip, means for wrapping it around the roll and fixing it in position when so wrapped: means for severing lengths of strip, means for supplying glue to such strips for attachment to such roll and to the strip itself and means for reinforcing the edges of said strip; said strip being of a composite type provided by two overlapping strips supplied from supply rolls, said rolls being movable to vary the amount of overlap; said strip being reinforced at each edge by edge bands supplied from supply rolls, said rolls being movable to conversely across the face of said strip, means forenergizing;

said gun at predetermined transverse. locations relative to said strip edges and means for altering .said energizaav tion location to conform to said varying strip widths.

References Cited in the file of this patent UNITED STATES PATENTS 619,234 Schulze Feb. 7, 1,351,809 Sutherland Sept. 7, 1920 2,078,496 Jaite Apr. 27, 1937 1 2,499,562 Behrens Marr7, 1950 2,561,146 Sieg May17, 1951 2,638,725 Hurter et al. May 19, 1953 2,737,002 Dernler Mar. 6,1956 2,770,080

Hoyt Nov. 13, 1956