SYSTEMS, METHODS, AND DEVICES FOR SPLICING SHEET MATERIALS

Abstract

A system for splicing together multiple sheets of generally rigid material into a continuous sheet. The system includes a cart with a cutting mechanism and a sealing mechanism. The cutting mechanism is configured to cut a pattern of segments through the sheet materials that can be interlocked to form a seam. The interlocking segments may include asymmetrical features. The sealing mechanism can apply tape to the seal to secure it. The splicing system may be used while one of the multiple sheets of generally rigid material is concurrently in use by a packaging machine without interruption to the packaging machine.

Claims

1. A method of splicing sheets of generally rigid material into a continuous length of sheet material, the method comprising: aligning and partially overlapping a first sheet of generally rigid material with a second sheet of generally rigid material; cutting a pattern of interlocking segments through the first and second sheets and along an axis spanning between opposing sides of the first and second sheets; removing an excess portion of material from the first and second sheets, such that the interlocking segments of each sheet are exposed; connecting the exposed interlocking segments of the first sheet to the exposed interlocking segments of the second sheet to create a seam; and securing the seam such that the interlocking segments remain connected.

2. The method of claim 1, wherein cutting a pattern of interlocking segments comprises cutting a pattern of interlocking segments that are asymmetrical about the axis such that the interlocking segments are staggered with respect to the axis.

3. The method of claim 1, wherein aligning and overlapping the first sheet of generally rigid material with the second sheet of generally rigid material comprises securing the first and second sheets in a lateral direction to prevent them from shifting out of alignment.

4. The method of claim 3, wherein securing the first and second sheets in a lateral direction comprises pressing corresponding sides of the first and second sheet against a reference wall or an adjustable guide arm.

5. The method of claim 1, wherein cutting a pattern of interlocking segments through the first and second sheets comprises cutting the pattern of interlocking segments through the first and second sheets at the same time using the same cutting mechanism.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To further clarify the above and other advantages and features of the present invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It is appreciated that these drawings depict only illustrated embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:

[0028] FIG. 1 illustrates an example packaging machine that uses bales of generally rigid sheet material to form box templates therefrom.

[0029] FIG. 2 illustrates an exemplary system for splicing together multiple sheets of generally rigid material into a continuous length of sheet material.

[0030] FIG. 3 illustrates an exemplary pattern of interlocking segments that may be used to splice together multiple sheets of generally rigid material into a continuous length of sheet material.

[0031] FIG. 4a illustrates the splicing system of FIG. 2 ready for use with a packaging machine similar to that shown in FIG. 1.

[0032] FIG. 4b illustrates the splicing system of FIG. 2 with two sheets of generally rigid material in position for cutting.

[0033] FIG. 4c illustrates the splicing system of FIG. 2 with the roller die cutter being operated to cut the two sheets of generally rigid material.

[0034] FIG. 4d illustrates the splicing system of FIG. 2 with the spliced sheets of generally rigid material in position for taping.

[0035] FIG. 4e illustrates the splicing system of FIG. 2 with tape positioned on the upper seam created by splicing two sheets of generally rigid material together.

[0036] FIG. 4f illustrates the splicing system of FIG. 2 with pressure being applied to a spliced and taped seam.

[0037] FIG. 5a illustrates a closeup view of an exemplary roller die cutter with two sheets of generally rigid material in place for cutting.

[0038] FIG. 5b illustrates a closeup view of the roller die cutter of FIG. 5a while in operation.

[0039] FIGS. 5c and 5d illustrate an example actuation mechanism of the roller die cutter of FIGS. 5a and 5b.

[0040] FIG. 6a illustrates a closeup view of an exemplary taping mechanism in an open configuration ready for use.

[0041] FIG. 6b illustrates a closeup view of the taping mechanism in FIG. 6a while in operation.

[0042] FIG. 7 illustrates multiple exemplary boxes formed by a packaging machine using sheet materials that have been spliced into a continuous sheet.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0043] The embodiments described herein generally relate to systems, methods, and devices for splicing together multiple sheets of generally rigid material to form a continuous sheet of material. More specifically, the described embodiments relate to systems, methods, and devices for splicing together bales of sheet material to be fed into packaging machines that in turn form packaging templates therefrom.

[0044] While the present disclosure will be described in detail with reference to specific configurations, the descriptions are illustrative and are not to be construed as limiting the scope of the present disclosure. Various modifications can be made to the illustrated configurations without departing from the spirit and scope of the invention as defined by the claims.

[0045] Throughout the description and claims, components are described as being in specific orientations or relative positions. Such descriptions are used merely for the sake of convenience and are not intended to limit the invention. For instance, a component may be described as being above or below another component. It will be appreciated, however, that the machines, system, and mechanisms may be oriented in other ways in some embodiments. As a result, a component that is described as being above another component may be positioned below or to the side of the other component in some embodiments. In some cases, a component that is described as being positioned above or below another component may be understood to be positioned on one side or another of sheet material that is being converted into packaging templates.

[0046] As used herein, the term box template refers to a substantially flat material that can be folded into a box-like shape. Box templates may be made from a stock of sheet material (e.g., paperboard, corrugated board, cardboard, etc.). In some cases, the sheet material is a fanfold material that has been folded back and forth on itself to form a balc. A box template may have notches, cutouts, divides, and/or creases that allow the box template to be bent and/or folded into a box. Additionally, a box template may be made of any suitable material, generally known to those skilled in the art. For example, cardboard or corrugated paperboard may be used as the box template material. A suitable material also may have any thickness and weight that would permit it to be bent and/or folded into a box-like shape.

[0047] FIG. 1 illustrates one example of a packaging system 100 that uses bales 102 of generally rigid sheet material 104 to create and erect box templates around to-be-packaged items. In the illustrated system 100, items for packaging are delivered to a machine 106 to be packaged by the machine 106. Alternative machines are available that focus only on the creation of box templates using the same or similar materials as the packaging machine 106. Each of the provided examples use bales 102 of generally rigid sheet material 104 that can be fed into the machine 106 for operation. Generally rigid sheet materials 104 include but are not limited to cardboard, corrugated board, and paperboard.

[0048] When a bale 102 is exhausted, an operator replaces the bale 102 in order to continue operation. This action generally requires that the packaging machine 106 be shut down or operation thereof be suspended while the operator installs the new bale 102 of material 104. The systems, apparatuses, and methods disclosed herein enable an operator to splice together sheet materials 104 from multiple bales 10 to form a continuous sheet of material such that the packaging machine 106 is able to continue production without interruption. For instance, before the sheet material 104 in a first bale 102 is exhausted (and while the machine 106 is still drawing sheet material 104 therefrom), the trailing end of the sheet material 104 from the first bale 102 can be spliced together with the leading end of sheet material 104 from a new bale 102. Because the sheet materials 104 from the first and new bales 102 are spliced together, once the sheet material 104 from the first bale 102 is exhausted, the machine 106 will automatically start drawing sheet material 104 from the new bale 102 without having to halt operation of the machine 106.

[0049] FIG. 2 illustrates an exemplary splicing system 110 that can be used to splice together the sheet materials 104 from multiple bales 102 together to form a continuous sheet between multiple bales. As a result, packaging machine 106 (see FIG. 1) can continue processing box templates without the interruption or stopping the machine 106 to load a new bale when the present bale of material is exhausted.

[0050] As shown, the splicing system 110 may include a cart 112. In some embodiments, the cart 112 may be movable. For instance, the cart 112 may be light enough to be carried by one or two individuals. In other embodiments, the cart 112 may include wheels 114 to enable the cart 112 to be rolled between desired locations.

[0051] The cart 112 also includes a cutting mechanism 114. In the illustrated embodiment, the cutting mechanism 114 is a roller die cutter that is configured to cut a pattern 116 of interlocking segments 118 (see FIG. 3) through each of the sheet materials 104 that are to be spliced together. The terms cutting mechanism 114 and roller die cutter 114 are used interchangeably herein. However, it will be appreciated that other types of cutting mechanisms may be used in place of or in addition to roller die cutters.

[0052] Also shown as part of the splicing system 110 is an actuation mechanism 120 for operating the cutting mechanism 114 (roller die cutter). The splicing system may also include one or more reference walls 122 for securing the sheet materials 104 while they are cut and subsequently joined. Furthermore, the splicing system 110 may also include an adjustable guide arm 124 that provides for varying widths of sheet materials 104 to be secured and/or aligned during the splicing process.

[0053] After the pattern 116 is cut into the sheet materials 104, the sheet materials 104 may be joined by the interlocking segments 118 of the pattern 116 to form a scam 126 (see FIG. 7) and subsequently sealed by a sealing mechanism 130 of the splicing system 110. In this example embodiment, the sealing mechanism 130 comprises a taping press 132 and a retractable base plate 134 for taping the seam 126 formed between the sheet materials 104. Other embodiments may employ glue or any other means for sealing the seam 126 between the sheet materials 104.

[0054] In the embodiment shown, and as discussed in greater detail below, a strip of tape may be applied across one or both faces of the seam 126. The retractable base plate 134 may be configured to move upward when the taping press 132 is actuated in order to apply pressure to the tape and the sheet materials 104 in order to ensure the tape is securely attached to the sheet materials 104.

[0055] FIG. 3 illustrates a plan view of an exemplary pattern 116 of interlocking segments 118 that may be cut through the sheet materials 104 that are to be spliced together. The illustrated pattern 116 includes interlocking segments 118 that are of varying and/or alternating heights and/or widths such that the resulting pattern is asymmetric about one or more axes of the pattern 116. Such a pattern can provide various benefits. For instance, after the pattern 116 has been cut through at least two sheets of material 104 (e.g., the trailing end of one sheet 104 and on the leading end of another sheet 104), the asymmetric pattern 116 can help ensure that the interlocking segments 118 on the trailing end of one sheet 104 and on the leading end of another sheet 104 are properly joined or mated together. Additionally, the asymmetrical nature of the pattern 116 can increase the strength of the resulting seam 126.

[0056] FIGS. 4a through 4f illustrate the exemplary splicing system 110 at successive steps in an exemplary splicing process. FIG. 4a shows the splicing system 110 in close proximity to a first bale 102a of generally rigid sheet material 104a that is being fed into a packaging machine 106 to be processed into box templates. In this example, a second bale 102b (formed of sheet material 104b) will be spliced with the first bale 102a to form a continuous sheet of material 104 without interrupting the operation of the packaging machine 106. In some embodiments, prior to loading the sheet materials 104a, 104b onto the splicing system 110, a first strip of tape 128 is placed across the retractable base plate 134 with the adhesive side of the tape 128 facing upward.

[0057] FIG. 4b shows the splicing system 110 in position with the sheet material 104a, 104b ready to be cut for splicing. A portion of sheet material 104a from the trailing end of the first bale 102a is stacked with a leading portion of sheet material 104b from the second bale 104b atop the splicing system 110 and underneath both the roller die cutter 114 and the taping press 132. The sheet materials 104a, 104b may then be cut using the roller die cutter 114 before proceeding to the next step in the splicing process.

[0058] In the illustrated embodiment, the trailing and leading ends, respectively, of the sheet materials 104a, 104b can be cut simultaneously by the roller die cutter 114. For instance, the trailing and leading ends, respectively, of the sheet materials 104a, 104b can be overlapped with one another and positioned below the roller die cutter 114 such that activation of the roller die cutter 114 cuts through the sheet materials 104a, 104b at the same time. Alternatively, the sheet materials 104a, 104b can be individually cut by the roller die cutter 114.

[0059] FIG. 4c shows the splicing system 110 with the roller die cutter 114 rotated so the cutting pattern 116 is oriented towards the sheet materials 104a, 104b. When the roller die cutter 114 is so rotated, the cutting pattern 116 is cut into the sheet materials 104a, 104b and excess material from the ends of the sheet materials 104a, 104b can be removed. The ends of the sheet materials 104a, 104b are left with mating patterns 116 cut therein. The mating patterns 116 can be joined together (e.g., by interlocking the mating segments 118) to form a continuous sheet of material 104.

[0060] FIG. 4d shows the splicing system 110 after the sheet materials 104a, 104b of bales 102a, 102b have been cut and subsequently joined to form a seam 126 that is ready to be sealed by the sealing mechanism 130. The seam 126 may be positioned between the taping press 132 and the retractable base plate 134 to be sealed by applying tape 128 (see FIG. 4a) across the seam 126 on one side of the now continuous sheet of material 104.

[0061] FIG. 4e shows the splicing system 110 after an optional second strip of tape 136 has been applied across the seam 126 on an opposing side of the now continuous sheet of material 104.

[0062] FIG. 4f shows the splicing system 110 with the taping press 132 in operation to apply pressure to the tape 136 applied to the top side of the seam 126. In at least one embodiment, operation of the taping press 132 also causes the retractable base plate 134 to apply pressure upward in order to press the tape 128 onto both sides of the recently spliced sheet of material 104. As stated previously, each step in the splicing process may be accomplished without an interruption to the ongoing operation of packaging machine 106.

[0063] FIGS. 5a and 5b show closeup views of the roller die cutter 114 in operation to cut the pattern 116 of interlocking segments 118 through the sheet materials 104a, 104b. For ease of illustration, portions of the splicing system 110 have been cut away to show the mechanisms illustrated in greater detail.

[0064] As can be seen, the trailing end of sheet material 104a and the leading end of sheet material 104b have been inserted under the roller die butter 114 such that the sheet materials 104a, 104b overlap one another. Prior to operation, when roller die cutter is rotated so that pattern 116 is orientated away from the top of the cart 112 (as shown in FIG. 5a), there is sufficient space between the top surface of the cart 112 and the roller die cutter 114 to allow the sheet materials 104a, 104b to be between the roller die cutter 114 and the top surface of the cart 112.

[0065] In some embodiments, it may be important to properly align the sheet material 104b with the sheet material 104a. For instance, it may be important that the sheet material 104b is aligned with sheet material 104a so that sheet material 104b is feed into the packaging machine 106 is a desired direction. To help align the sheet materials 104a, 104b, the sheet materials 104a, 104b may be pressed against one or both references walls 122 and/or adjustable guide arm 124. The reference walls 122 and/or the adjustable squaring arm 124 may align the sheet materials 104a, 104b such that they are in line with one another or form a straight line. If the sheet materials 104a, 104b are not properly aligned with one another, the resulting spliced sheet material 104 may become jammed in the packaging machine 106.

[0066] For instance, with the sheet materials 104a, 104b inserted between the roller die cutter 114 and the top surface of the cart 112 and overlapping one another, corresponding sides of the sheet materials 104a, 104b can be pressed against one or both of the reference walls 122. If the sheet materials 104a, 104b are wide enough to span between both of the references walls 122, opposing sides of the sheet materials 104a, 104b can be guided in alignments by the reference walls 122.

[0067] In the event that the sheet materials 104a, 104b are not wide enough to contact both of the reference walls 122, corresponding sides of the sheet materials 104a, 104b can be pressed against one of the reference walls 122. Optionally, the adjustable guide arm 124 can be moved into engagement with the opposing sides of the sheet materials 104a, 104b to press the sheet materials 104a, 104b into engagement with one reference wall.

[0068] To facilitate proper alignment between the sheet materials 104a, 104b, the reference walls 122 and/or the adjustable guide arm 124 may have a length of 6 inches, 12 inches, 18 inches, 24 inches, or more. As will be appreciated, the longer the length of the reference walls 122 and/or the adjustable guide arm 124 (against which the sheet materials 104a, 104b may be pressed against), the more accurately the sheet materials 104a, 104b may be aligned with one another.

[0069] FIG. 5b shows the roller die cutter 114 during operation. In particular, the roller die cutter 114 is rotated so the pattern 116 is oriented towards the sheet materials 104a, 104b. When the roller die cutter 114 is so rotated, the pattern 116 is cut into the sheet materials 104a, 104b. When the pattern 116 is cut into the sheet materials 104a, 104b, excess material is cut off of the trailing end of sheet material 104a and the leading end of sheet material 104b. The remaining ends of the sheet materials 104a, 104b are left with the mating shape of the pattern 116.

[0070] FIGS. 5c and 5d illustrate an actuation mechanism 140 for moving the roller die cutter 114 from the non-activated or non-cutting position shown in FIG. 5a to the activated or cutting position shown in FIG. 5b. As can be seen in FIGS. 5c and 5d, the actuation mechanism 140 includes a rack 142, a pinion 144, a rotatable handle 146 (not shown in FIG. 5d), and a gear 148. The rack 142 is mounted on the cart 112 and includes a line of gear teeth. The pinion 144 includes a plurality of gear teeth disposed around a circumferential surface. The teeth of the rack 142 and the teeth of the pinion 144 mate with one another and allow the pinion 144 to roll along the rack 142. The pinion 144 is mounted on the roller die cutter 114 such that rotation of the pinion 144 rotates the roller die cutter 114.

[0071] The rotatable handle 146 is rotatably connected to a slider 150 (not shown in FIG. 5d) such that the rotatable handle 146 can rotate relative to the slider 150. The slider 150 is slidably mounted on a track 152. The track 152 is mounted on the cart 112. The rotatable handle 146 is connected to the gear 148 such that rotation of the rotatable handle 146 rotates the gear 148. The gear 148 include gear teeth that mate with the gear teeth of the pinion 144. In operation, the rotatable handle 146 may be rotated, which in turn rotates the gear 148. Rotation of the gear 148 causes the pinion 144 to rotate. Because the pinion 144 is mounted to the roller die cutter 114, rotation of the pinion 144 causes the roller die cuter 114 to also rotate (e.g., between the activated and non-activated positions). Additionally, rotation of the pinion 144 causes the pinion to move along the length of the rack 142. As the pinion 144 moves along the length of the rack 142, the slider 150 slides along the length of the track 152.

[0072] Once the ends of the sheet material 104a, 104b have bee cut with the roller die cutter 114 and the excess material removed, the ends of the sheet materials 104a, 104b can be joined together to form a seam 126. In particular, the mating segments 118 of the pattern 116 cut therein can be locked together. For instance, the male segments 118 of the pattern 116 in the sheet material 104a can be inserted into the corresponding female segments 118 of the pattern 116 in the sheet material 104b, and vice versa.

[0073] Once the sheet materials 104a, 104b are locked together, the scaling mechanism 130 can be used to apply tape across the interlocking segments 118 to the secure the seam 126. FIGS. 6a and 6b show closeup views of the sealing mechanism 130. FIG. 6a shows sealing mechanism 130 in an open position prior to operation and FIG. 6b shows the sealing mechanism 130 during operation. As illustrated, the sealing mechanism 130 includes the taping press 132 and the retractable base plate 134.

[0074] When the taping press 132 is in the open position, the retractable base plate 134 is positioned below top surface of the cart 112 and the sheet material 104. Because the retractable base plate 134 recessed below the top surface of the cart 112, the retractable base plate 134 does not come in contact with the sheet material 104 prior to operation of the taping press 132. As a result, a strip of tape 128 can be to be placed upon the retractable base plate 134 at the beginning of the splicing process (as shown in FIG. 4a), without coming into contact with the sheet material 104 until a desired time.

[0075] With the sealing mechanism 130 in the open position, the seam 126 formed between the sheet materials 104a, 104b can be positioned between the taping press 132 and the retractable base plate 134, as shown in FIGS. 4d and 6a. That is, the seam 126 can be position over the retractable base plate 134 and below the taping press 132.

[0076] Once the seam 126 is properly positioned, a piece of tape 136 can be applied across the seam 126 on the side of the sheet material 104 facing the taping press 132, as shown in FIG. 4e. The taping press 132 can then be moved from the open position shown in FIG. 6a to the closed position shown in FIG. 6b. Movement of the taping press 132 to the closed position causes the taping press 132 and the retractable base plate 134 to compress the tape 128, 136 onto opposing sides of the seam 126, thereby securing the same 126.

[0077] The taping press 132 and the retractable base plate 134 are interconnected such that movement of the taping press 132 from the open position to the closed position causes the retractable base plate 134 to be raised up. In some embodiments, the retractable base plate 134 can be raised up to or above the top surface of the cart 112. The upward movement of the retractable base plate 134 and the downward movement of the taping press 132 provides the compressive force that applies the tape 128, 126 to the seam 126.

[0078] In the illustrated embodiment, the taping press 132 is rotatably mounted on a pivot pin 138 and include a press arm 132a and a linkage arm 132b. The retractable base plate 134 is connected to a rod 140 via a plurality of pivot linkages 142. The rod 140 is connected to the linkage arm 132b such that rotation of the taping press 132 (including the press arm 132a and the linkage arm 132b) causes the rod to move. The movement of the rod 140 in turn causes the pivot linkages 142 to pivot. The pivoting movement of the pivot linkages 142 causes the retractable base plate 134 to move between the retracted position (FIG. 6a) and the raised position (FIG. 6b).

[0079] FIG. 7 shows several boxes produced using sheet materials 104 that have been spliced together and sealed according the exemplary process described in reference to FIGS. 4a to 4f. As shown, the seams 126 formed by the splicing process are sufficiently durable to allow for a box to be created with the seam 126 extending through a wall of the resulting box or even at a corner of the resulting box. Such durability may be achieved by use of the asymmetrical pattern 116 of interlocking segments 118 as discussed in relation to FIG. 3.

[0080] The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects only as illustrative and not restrictive. The scope of the invention is, therefore, indicated by the appended claims rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.