This application relates generally to an adhesive tape application device and, more specifically, to a tape application device that can fold up the end of the tape so as to form a non-adhesive portion to facilitate easy peeling off of the adhesive tape when needed to open a case to which the tape has been applied.
In the packaging industry, using adhesive tape to seal a case in order to protect the product inside the case is widely known. A common problem that follows the use of adhesive tape to seal cases is that it is very difficult to peel the tape off of the case when opening of the case is desired. Insertion of a cutter into the flap gap between the two major flaps to cut the tape is a common way to solve the problem, but sometimes this will undesirably cut or otherwise damage the products inside the case.
Known case tape applicators normally do not possess “easy peel off” functionality to make adhesive more easier to peel off. Several attempts can be found in U.S. Pat. Nos. 7,334,620; 7, 357, 285; 7,537,036 and US Patent Appln. No. 2006/013,1356. All of these tape applicators are manual tape applicators and not used in a case sealing machine. The idea behind these tape applicators is that they try to form one non-adhesive long side or edge of an adhesive tape so that it can be peeled off from the long side of the tape. In another attempt found in U.S. Pat. No. 8,393,375, a tape applicator is designed to be used in a case sealing machine, and can fold up both long sides of an adhesive tape to form two non-adhesive sides for easy peel off.
A common problem with the above mentioned attempts is that at least one whole long side of the tape is non-adhesive (and U.S. Pat. No. 8,393,375 two whole sides). When the sealed cases are stacked, if a worker puts a case on the top of another case and pushes the upper case along the top surface of the lower case, then the non-adhesive tape side of the lower case will be push against the bottom of the upper case, in which case the non-adhesive side of the lower case may be flipped over and stick on the bottom of the upper case. As a result, the non-adhesive tape side edge on the lower case will be peeled off by the push force.
Another problem is that, because the long side edge of the tape is formed as non-adhesive, the surface adhesive area of a tape for sealing the case is reduced. In other words, the case will be easier to open by applying slight force against the flap gap, making it easier for someone to steal the products inside the case. This problem is more prevalent in the U.S. Pat. No. 8,393,375 because it forms both long sides of the tape as non-adhesive and therefore the adhesive surface area for sealing the case is greatly reduced.
It would be desirable to provide a tape applicator that applies tape to cases in a manner that enables easy peel off but that reduces or eliminates potential issues such as tape pealing during case stacking and/or substantial reduction of the adhesive contact surface on the case.
An adhesive tape application device does not reduce the sealing power of the adhesive tape on one hand and on the other hand, still provides an easy peel off end of the adhesive tape for case opening. This adhesive tape application device can be used for both as top and bottom case sealing. As a way to illustrate the adhesive tape application device, a bottom adhesive tape application device is described herein.
In one aspect, a method of taping a case involves: moving the case along a case travel path of a case sealing machine; a tape applicator device presenting a free end of a tape supply into the case travel path, wherein the free end includes a non-adhesive end flap portion formed by an end fold over; a leading panel of the case contacts the free end and the portion of the free end adjacent the non-adhesive end flap portion adheres to the leading panel at an initial adhesion point but with the non-adhesive end flap portion not adhered to create a grippable tape removal flap; continued movement of the case causes the tape to be applied from the initial adhesion point toward and onto a flap side of the case and then along the flap side of the case with one side of the tape adhering to an edge of a first flap and another side of the tape adhering to an edge of a second flap; as the flap side of the case clears the tape applicator device tape is applied from the flap side onto a trailing panel of the case; cutting the tape to complete a length of tape being applied to the case and to create a new free end of the tape supply; and automatically folding over the new free end of the tape supply upon itself to form another non-adhesive end flap portion in preparation for a next case taping operation.
In another aspect, a method of taping a case involves: a tape applicator device presenting a free end of a tape supply into a case travel path along which a case moves through a case sealing machine, wherein the free end includes a non-adhesive end flap portion formed by an end fold over; a leading panel of the case contacts the free end and a portion of the free end adjacent the non-adhesive end flap portion adheres to the leading panel but with the non-adhesive end flap portion not adhered to create a grippable tape removal flap; continued movement of the case causes the tape to be applied on the case toward and onto a flap side of the case and then along the flap side of the case with one side of the tape adhering to an edge of a first case flap and another side of the tape adhering to an edge of a second case flap; continued movement of the case causes the tape to be applied from the flap side onto a trailing panel of the case; cutting the tape to complete a length of tape being applied to the case and to create a new free end of the tape supply; and automatically folding over the new free end of the tape supply upon itself to form another non-adhesive end flap portion in preparation for a next case taping operation.
In another aspect, a tape applicator device is provided for use in a case sealing machine in which cases moving along a case travel path are taped along a portion of a leading panel, a flap side adjacent the leading panel and a trailing panel adjacent the flap side. The tape applicator device includes a tape applying roller for holding an adhesive side of tape against the case. A tape fold over mechanism is associated with the tape applying roller and movable from a non-fold over position away from the tape applying roller to a fold over position toward the tape applying roller. A tape travel path extends past the fold over mechanism when the mechanism is in the non-fold over position, and the fold over mechanism moves across the tape travel path when moving from the non-fold over position to the fold over position.
In one aspect, an adhesive tape application device is mounted to a case sealing machine. The adhesive tape application device includes a tape holder, and a base plate which allows a front roller plate to mount on it. At the bottom of the front roller plate, a front roller is mounted, and a non-adhesive tape forming device is also mounted on it. The non-adhesive tape forming device may be composed of a flip bar support basket, and as an ear-shape flip bar weldment. On the flip bar support basket, a magnet retainer, a magnet holder, a spring retaining bar and a backing pad are mounted. The ear-shape flip bar weldment includes a U-shape flip bar and a spring holding bar. The front roller plate is linked with the back roller plate by a rod and lets the front and back roller work simultaneously. On the base plate several holes are set to let the base plate connect with the front plate. The front plate has two holes which allow the adjustable knife mounting plate to mount on it. The front plate has another set of holes to enable the static roller mounting plate to connect with it.
The details of one or more embodiments are set forth in the accompanying drawings and the description below. Other features, objects, and advantages will be apparent from the description and drawings, and from the claims.
Referring to
Referring to
A case sensing basket 62 is mounted on the knife cutting plate 6. At the front end of the front plate 3, an L-shape static roller mounting plate 7 is connected through holes 73 with the base plate 2 by two connecting rods 8 and holes 81 (not shown in
Per
Referring to the
Per
On the front plate 3 two threaded fasteners 39 extend from the front plate 3 and are used to pass through the two parallel long oval shape opening 32 of the adjustable knife mounting plate 31 and connect with the bolts that complete the fastener arrangements 34. At the front side of the front plate 3, there are two holes 38 which allow the fasteners 73 to pass through and mount the L-shape static roller mounting plate 7 with the front plate 3 and finally connect with the base plate 2 by two connecting rods 8 (shown in
On the L-shape static roller mounting plate 7, there is a vertical elongate shape opening 71 which allows a threaded fastener 74 to pass through and screw into the tape tension roller 72. The tape tension roller 72 moves upward and downward to adjust the tension of the tape in order to adjust the length of the tape that stays on the front roller 43 after cutting.
In
In
In
In
In
Continuing in
As illustrated in
Thus, an advantageous tape applicator device is provided that can be used in case sealing machines to automatically produce sealed cases in which one end of the tape used to seal the case include a grippable tape removal flap that is located on a panel side of the case (e.g., on the leading panel, but not on a flap side of the case). In particular, a tape applicator includes a tape applying roller (e.g., roller 43) for holding an adhesive side of tape against the case during tape application. A tape fold over mechanism (e.g., flip bar 57) is associated with the tape applying roller and is movable from a non-fold over position (e.g., per
In one implementation, a tape cutter (e.g., knife 61) is located downstream (e.g., in the direction of case travel and tape travel) of the fold over mechanism and is movable through the tape travel path for cutting tape and forming a free tape end (e.g., per
The fold over mechanism may be biased into the fold over position (e.g., by a torsion spring on spring holding bar 59). A releasable catch (e.g., per the magnetic catch of
In the primary embodiment, the releasable catch is a magnetic catch (e.g., including magnet 551) and the tape cutter exerts a force on the fold over mechanism that overcomes the magnetic catch.
In one implementation, a tape support surface (e.g., surface of backing pad 58) is positioned proximate the tape applying roller. When the fold over mechanism is in the fold over position it is urged toward the tape support surface to hold a folded over tape end against the tape support surface (e.g., per
In one implementation, a distance from the tape cutter to the fold over mechanism is adjustable to vary a size of the non-adhesive grip flap that is produced (e.g., per adjustment of the position of the knife mounting plate 31 adjustable along slots 32).
The tape applicator device is mountable within a case sealing machine (e.g., the machine of
From the above description it is apparent that an advantageous case taping method is provided. In particular, a method of taping a case involves moving the case along a case travel path of a case sealing machine. A tape applicator device presents a free end of a tape supply into the case travel path, wherein the free end includes a non-adhesive end flap portion formed by an end fold over. A leading panel of the case contacts the free end and the portion of the free end adjacent the non-adhesive end flap portion adheres to the leading panel at an initial adhesion point, but with the non-adhesive end flap portion not adhered to create a grippable tape removal flap. Continued movement of the case causes the tape to be applied from the initial adhesion point toward and onto a flap side of the case and then along the flap side of the case with one side of the tape adhering to an edge of a first flap and another side of the tape adhering to an edge of a second flap. As the flap side of the case clears the tape applicator device tape is applied from the flap side onto a trailing panel of the case. The tape is cut to complete a length of tape being applied to the case and to create a new free end of the tape supply. The new free end of the tape supply is automatically folded over upon itself to form another non-adhesive end flap portion in preparation for a next case taping operation.
In one implementation of the method, movement of the case into the tape applicator device causes at least a portion of the tape applicator device to shift during tape application. A knife component includes a knife mounted on a pivotable carrying bracket that is contacted by the case to hold the knife in a position retracted from a tape travel path, when the case clears the bracket, the bracket pivots so as to move the knife through the tape travel path and cut the tape, and movement of the bracket also triggers a tape folding bar that folds over the new free end of the tape.
In one implementation of the method, the method includes presenting the new free end with non-adhesive portion into the case travel path.
In one implementation of the method, movement of a knife component to cut the tape triggers a fold over mechanism to fold the new free end of the tape.
In one implementation of the method, the fold over mechanism is biased toward a fold over position, the fold over mechanism is held in a non-folder over position by a releasable catch until the knife component causes release of the catch.
In one implementation of the method, the releasable catch is a magnetic catch and the knife component exerts a force on the fold over mechanism that overcomes the magnetic catch.
In one implementation of the method, the fold over mechanism is mounted for pivotal movement between a non-fold over position and a fold over position.
In one implementation of the method, the knife component is located downstream of a first tape applying roller and the fold over mechanism is located between the first tape applying roller and the knife component.
In one implementation of the method, a position of the knife component is adjustable to and such adjustment sets fold over size.
In one implementation of the method, a second tape applying roller is located downstream of the knife component for completing tape application to the case after cutting of the tape.
In one implementation of the method, the non-adhesive portion has a length of between about ½ inch and about 3 inches and the another non-adhesive portion has a length of between about ½ inch and about 3 inches.
In one implementation of the method, side portions of the length of tape applied to the case are adhesive along the length of tape with the exception of the non-adhesive end flap portion.
It is to be clearly understood that the above description is intended by way of illustration and example only, is not intended to be taken by way of limitation, and that other changes and modifications are possible.
This application is a continuation of U.S. application Ser. No. 15/145,344, filed May 3, 2016, which in turn claims the benefit of U.S. Provisional Application Ser. No. 62/156,359, filed May 4, 2015, both of which are incorporated herein by reference.
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Number | Date | Country | |
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Number | Date | Country | |
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Parent | 15145344 | May 2016 | US |
Child | 15254448 | US |