US 3607563 A
Description (OCR text may contain errors)
United States Patent I John Bagnall 1785 Caledonia Road, Mount Royal, Quebec, Canada App]. No. 662,399
Filed Aug. 22, 1967 Patented Sept. 21, 1971 Inventor BAG HANDLE FORMING MACHINE 4 Claims, 7 Drawing Figs.
US. Cl 156/439, 93/8, 156/177, 156/562 Int. Cl B65h 17/00 Field of Search 156/439, 177, 562; 93/8, 35
 References Cited UNITED STATES PATENTS 2,075,672 3/1937 Stark 156/177 2,586,514 2/1952 Canno 93/35 2,844,075 7/1958 Davis et al. 93/8 3,388,628 6/1968 Blayney 156/440 X 3,424,067 l/1969 Blair 156/440 X Primary ExaminerBenjamin R. Padgett Att0rney-C. A. Rowley ABSTRACT: The present invention relates to the formation of bag handles by laying a handle rope into a sinusoidal curve over a glued tape with the tape forming the axis of the curve and then superimposing the second tape over the first tape and severing the tapes along said axis and finally alternatively separating formed handles from opposite sides of said axis.
PATENTEB SEP21 1971 SHEET 1 [IF 3 INVENTOR John BAGNALL A TTORNE PATENTED SEP21 19m SHEET 2 OF 3 INVENTOR John BAGNALL PATENTED SEP21 I971 sum 3 BF 3 "war/1'01: John BAGNALL The present invention relates to a machine for forming bag handles and to bag handles formed thereby, more particularly to a machine for the continuous manufacture of bag handles and to bag handles formed without staples.
Various machines have been proposed for the manufacture of bag handles. One is shown in US. Pat. No. 2,075,672. This machine intermittently advances a web while forming rope into substantially sinusoidal configuration across the web and stapling the rope to the web. Such a machine is relatively slow in operation due to the intermittent movement and forms a handle of inferior quality compared to the handle formed by the instant invention.
Various aspects of the invention will be more specifically described by reference to the preferred embodiments which are illustrated in the accompanying drawings in which:
FIG. 1 is a perspective view of a bag handle formed in accordance with the present invention.
FIG. 2 is a view along the lines X-X of FIG. 1.
FIG. 3 is a schematic view illustrating the steps in the manufacture of the handle of FIGS. 1 and 2.
FIG. 4 is a partly schematic cross-sectional view of a machine for manufacturing the handles of FIGS. 1 and 2 and carrying out the steps illustrated in FIG. 3.
FIG. 5 is a plan view of the machine of FIG. 4.
FIG. 6 is an elevation view of the machine of FIG. 4 viewed from the left-hand side of FIG. 4, and
FIG. 7 is a schematic view illustrating the movement of one specific part of the machine.
In FIG. 1, there is shown an improved handle made in accordance with the invention. The handle is lighter, cheaper to make, and more readily glued in place than the previously known stapled handles. In the handle of FIG. 1, the carrier portion 25 is essentially similar to prior handles but the base portion 26, instead of being a single piece of stiff cardboard to which the carrier portion 25' is stapled, comprises two pieces of strong but lightweight kraft paper and the carrier portion 25 is adhered in sandwiched relationship between the two layers 30 and 31. The type of paper used, is, for example, brown kraft paper of 60 lbs. per ream, a ream being considered as 500 sheets 24 inches by 36 inches. The layers 30 and 31 are laminated together by glue, and this is carried out in preferably such a way that the layer 30 remains substantially flat, whereas the layer 31 is moulded around the thickness of the carrier portion 25', as shown more clearly in FIG. 2. The layers 30 and 31 may be, for example, between 6 inches and 8 inches long and about 1 inch wide, a reasonable range being about three-fourth inch to 1% inches. The construction of the handle, as shown in FIG. 2 ensures good adherence of the carrier portion 25' to the layers 30 and 31. At the same time, the face of the layer 31 is sufficiently smooth to ensure good adherence between that face and the bag. There are no staples to interfere with the adherence to the bag, and the lightweight nature of the base portion renders the finished bag less liable to tear.
The handles of FIGS. 1 and 2 are manufactured by a novel sequence of steps illustrated by FIG. 3. The layer 30 is laid over a rotating surface of a drum 40 on the cylindrical surface of which are provided a number of projecting studs 41. As the drum rotates, the carrier rope 42 for the carrier portion 25 is laid around the studs 41, so that the rope leaves the drum 40 in approximately sinusoidal form, so that loops constituting the carrier portions 25' project alternately from opposite sides of the strip 30', which is double the eventual width of the base portion of the handle. The outwardly facing side of the strip 30 is precoated with adhesive which is shown in the form of dots. As the rope is laid across the strip 30' between the loops, it sticks to the adhesive. Subsequently, a second layer 31' is laid over the layer 30', the two layers being of the same width. The layer 31' is pressed in place against the layer 30 and around the rope 42 by suitable means.
Next, slits 43 are made in the combined strips 30, 31, such slits extending halfway across the width of the combined layers, and being cut from alternate side edges of the combined layers at positions opposite the apexes of the curve.
After the half-slits 43 are formed, the combined layers 30',
31', together with the rope, are slit longitudinally down the.
center so that the construction falls apart into a succession of handles of the configuration shown in FIG. 1.
The machine forcarrying out the steps illustrated in FIG. 3 is shown in FIGS. 4, 5 and 6. The necessary parts of the machine will become apparent from the following description. The strip 31' of kraft paper which is, for example, 3% inches wide is fed from a feed roll 50 through a succession of guide rollers 51 and against the cylindrical surface of drum 40, centrally between the projecting studs 41 shown more clearly in FIGS. 5 and 6. The centermost of the guide rolls 51 rotates within a glue pot 55 and coats the exposed face (lower face) of the strip 31.
Rope 42 from a feed roll (not shown) is fed to the drum 40 by means of a reciprocating guide lever 52 pivotably connected to the frame of the machine by a pivot pin 56. The lever 52 has an axial extension 54 slideably mounted in the bore of a bearing 63 attached to the lever 52. Lever 52 is reciprocated about pivot 56 by means of a cam roll 57 provided with a suitably shaped cam slot 58 which engages a cam follower 59 at the lower end of the lever 52. The cam roll 57 is indicated by the dotted lines in FIG. 4 is geared to the drum 40 for rotation in synchronization therewith. The extension 54 is also provided with a follower roller 62 that engages a pair of cams 61 that impart a controlled movement or extension of the extension 54 axially relative to the lever 52 as will be described hereinbelow.
As the roller 57 rotates and rocks the lever 52 back and forth about pin 56 the extension 54 is moved outward against a return spring 60 by means pivoting cam elements 61. As the top end of the lever 52 moves in one direction the roller 62 rides along the upper surface of one of the cams 61 so that the extension 54 is drawn out against the spring 60. As the roller reaches the end of the cam 61 adjacent the side of the machine, the roller 62 passes around the end of the cam to free the roller from the cam and permit the extensions 54 to be retracted by the spring 60. In the retracted position, the stop 63' engages a suitable bumper on the housing for bearing 63. At this time the direction of movement of the upper end of the lever 52 is reversed by the cam 57 and roller 59 and the roller 62 returns beneath the cam 61 which it has left. When the roller 62 reaches the cam block 61 (see FIG. 7) at the centerline of the machine, it rolls up the block 61' and lifts the cam 61 which it has left upwardly out of the way and then rides up onto the opposite 61 as it continues to move to the opposite edge of the machine and the process is then repeated. The motion of the roller 62 which is proportional to the motion of the eye 53 is clearly shown by the arrow in FIG. 7.
During the above described movement of the extension 54 the rope contacts the pins 41 and is drawn through the eye 53. When the roller 62 is riding on the upper surface of a cam 61 (i.e., increasing the effective length of the arm 52) the eye 53 is in advance of the pins 41 and therefore places the rope in front of the pins 41 and when the roller is returning beneath the cam 61 the rope trails the pin 41. At all times the rope is held in contact with the surfaces of the pins by tension applied to the rope.
The shape into which the rope 42 is formed is dependent on the arrangement of pins on the drum 40 and the operation of the lever 52. The rope is generally formed into a substantially sinusoidal configuration, however, the rope preferably traverses the strip 31 in a direction perpendicular to the strip and therefore the configuration of the rope 42 is not truly sinusoidal.
As the strip 31 and the rope 42 are applied to the drum a second strip 30 of the same width as the strip 31' is fed from a roll 64 over guide rolls 65 into engagement against a gumming roller 66 which rotates in a glue bath 67. This second strip 30' is applied directly over the strip 31 and the section of the rope 42 overlying the strip 31' just before the strip 31 and rope 42 leave the drum 40.
A pressure guide roll 68 of special construction (as shown in MG. 6) presses the strip 30' into intimate contact with the strip 31 and about the rope 42. This roll 68 is provided with recesses 69 to clear the studs 41 as they pass under the roller and is formed with a central cutting disc 71 and a pair of roller sections 70 closely adjacent to the opposite sides of the cutting discs 71. These roller sections 70' are integral with the roll 68 and are wide enough to span from the cutting disc 71 to the free edges of the strips 30 and 31. Axially aligned grooves 70 are provided in the sections 70'. The roller sections 70' force the strip 30' into intimate contact with the strip 31 while the grooves 70 accommodate the rope 42 and ensure that the strip 30 is forced into intimate contact with at least a semicircular area of the rope 42. The cutting disc 71 severs the rope 42 through the strip 30 and facilitates the later separation of the formed handles. If desired, this cutting disc may be designed to sever completely through the strip 30, rope 42 and strip 31 to separate a pair of handle sections.
Upon leaving the drum 40, the combined strips 30', 31', and rope 42 pass between a pair of rolls 72, 73. The roll 72 is provided with a pair of diagonally opposed knives 74, 75, which are arranged to extend axially halfway across the axial length of the roll from the center to opposite sides of the roll. The roll 72 is of the appropriate diameter so that the halfway cuts 43 shown more clearly in FIG. 3 are made in the combined strips 30, 31 by the knives 74 and 75.
The combined strips 30, 31' and rope 42 then pass through another pair of rolls 76, 77. Roll 77 rotates in a glue bath 78, and roll 76 contacts glue-covered roll 79 fed with glue from a glue bath 80, so that the top and bottom faces of the layers 30', 3| are coated as they leave the machine. The roll 76 is provided with a central peripheral cutting disc 76' which severs the combined layers 30, 31' to separate the carrier handles as they pass underneath against the roll 77. The rolls 77 and 79 are provided with peripheral grooves to receive the knife blade of the roll 76.
As the individual carrier handles are severed, they fall onto hooks 81 extending from the sides of a pair of conveyors 82. The conveyors 82 carry the glued handles ready for insertion at the next stage into carrier bags. Conveniently, a folding station and operator can be situated on opposite sides of the conveyors 82, so that the operators simply pick off the handles and insert them into bags as the conveyor passes.
lt has been found that the machine can operate satisfactorily at a rate of between 72 and 100 handles per minute.
it is contemplated that many modifications may be made in the machine. For example, the studs 41 need not be arranged in a complete semicircle. It is only necessary that two studs be provided for each handle loop. The handle loops would then not be round, but would be three-sided. Alternatively, the studs 41 could be replaced by a curved ridge, which might be provided on the drum by moulding or die casting. Although the machine has been illustrated using handle rope made from twisted paper by known means, and that this type of handle is cheap and suitable, other types of handles, for example, cord handles, may equally well be used.
l. A handle-forming machine comprising conveyor means, means to apply a first strip of material to a surface of said conveyor means, means to apply a handle forming rope in crisscross relationship over said strip on said conveyor means as said surface moves, means for delivering a second strip to said conveyor in overlying relation to said first strip and said rope, pressure means having a pressure-applying surface, a groove in said pressure-applying surface, said pressure-applying surface being positioned to cooperate with said surface of said conveyor to press said second strip against said first strip and into intimate contact with said first strip and said groove receiving said rope and pressing said second strip into hugging relationship about said rope as said first strip, said second strip and said rope move continuously with said conveyor means whereby said first strip, said second strip and said rope are adhesively bonded together.
. An apparatus as defined in claim 1 wherein said means for applying said handle rope comprises; a pivoted lever, an axially extendable section on said lever, an eye in said section through which said rope is fed, means to oscillate said lever and further means extending and retracting said extendable section.
3. An apparatus as defined in claim 1 wherein said conveyor means is a drum and further comprising pins projecting from said drum, said pins being arranged in a predetermined pattern and being positioned to engage said rope as said rope is fed onto said drum thereby to aid in forming said rope into the desired pattern,
4. An apparatus as defined in claim 3 wherein said pressure means comprises; a roller mounted to rotate on an axis paral' lel to the axis of rotation of said drum, said pressure applying surface extending peripherally of said roller and being sufficiently wide to cover said strips and said groove extending parallel to said axes.