ADHESIVE TAPE STRIP AND TAPE FLAG PADS WITH CENTER TABBED LEADER STRIP

Abstract: A centrally tabbed adhesive tape strip pad (20) and centrally tabbed adhesive tape flag pad in which the centrally positioned pull tab portion of the leader strip (60) facilitates initiation of dispensing without the use of prethreaded leader bands and facilitates insertion of a new pad into typical refillable dispensers.

Description: ADHESIVETAPESTRIPANDTAPEFLAGPADS WITHCENTERTABBEDLEADERSTRIP Field ofthe Invention The invention broadly relates to pads of adhesive tape strips and adhesive tape flags. More specifically, the invention relates to leader strips used to initiate dispensing of individual adhesive tape strips and adhesive tape flags from such pads. Background Rolls of adhesive tape and pads of adhesive tape flags are widely used throughout the world. The most widely used variety of adhesive tape flags are those which utilize a repositionable adhesive. Rolls of repositionable tape, such as the "Post-It®" brand rolls of repositionable tape sold by Minnesota Mining and Manufacturing of Saint Paul, Minnesota, have a variety of uses, including the mounting of customized signage sheets to a window (e.g. "Dog Lost Poster") and mounting easel pad pages to a wall after they have been removed from the easel pad. Pads of repositionable tape flags, such as the widely used "Post-It®" brand tape flags sold by Minnesota Mining and Manufacturing of Saint Paul, Minnesota have become a staple office supply product throughout the world. A variety of dispensers have been developed for the pads of adhesive tape flags. These dispensers include (i) disposable and refillable dispensers, (ii) shuttling and nonshuttling dispensers, (iii) high volume/high profile and low volume/low profile dispensers, (iv) single pad and multiple pad dispensers, (v) hand held and mountable dispensers, etc. One common feature found on most pads of adhesive tape flags, regardless of the type of dispenser used, is the presence of some type of leader strip used to initiate dispensing of individual flags from the pad. While a variety of useful leader strip configurations have been developed, a continuing need exists for a leader strip configuration which is simple and inexpensive to manufacture and install, useful with a variety of different types of dispensers, reliable, and easy for consumers to use. Summary of the Invention We have discovered a unique leader tape configuration for use in connection with pads of adhesive tape strips and adhesive tape flags. Adhesive Tape Strip Pad The adhesive tape strip embodiment of our invention comprises a leader strip attached to a pad of adhesive tape strips. The pad comprises a plurality of superimposed individual tape strips. The first major surface of each tape strips is coated with a low adhesion backsize to facilitate separation ofthe individual strips, while the second major surface of each tape strip is coated with an adhesive. The pad includes an uppermost tape strips with an exposed first major surface ofthe uppermost tape strips, and a lowermost tape strips with an exposed second major surface ofthe lowermost tape strip. The leader strip is aligned with and superimposed over a position ofthe exposed first major surface ofthe uppermost tape strip. A tacky first longitudinal end portion ofthe leader strip is positioned proximate the first longitudinal edge of the pad and adhesively bonded to the exposed first major surface ofthe uppermost tape strip, while a nontacky second longitudinal end portion ofthe leader strip is positioned intermediate the first and second longitudinal edges ofthe pad so as to form a nontacky centrally positioned pull tab portion. The pull tab portion does not bond to the pad and can be readily grasped for initiating dispensing of individual tape strips from the pad. The pull tab portion is preferably positioned so that the free longitudinal end ofthe pull tab portion is longitudinally spaced less than about one fifth the complete longitudinal length ofthe pad away from the lateral axis ofthe pad. Continued dispensing ofthe individual tape strips is achieved by (i) adhering the second major surface of each individual tape strip in the pad to the first major surface of an immediately underlying tape strip at a first adhesive strength, except for a selected area proximate one ofthe longitudinal edges ofthe strip where the tape strip is adhered to the first major surface ofthe immediately underlying strip at a lower adhesive strength, and (ii) configuring the individual tape strips in the pad so that successive strips in the pad are positioned with the lower adhesive strength area of each strip alternating between the first and second longitudinal edges ofthe pad. The difference in adhesive strengths is selected so that the lower adhesive strength portion of each strip will delaminate from the immediately underlying strip when an immediately overlying strip is peeled from the pad. The change in adhesive strength can be achieved by several mechanisms including (i) coating only a portion ofthe second surface of each tape strip with adhesive, (ii) pattern coating the adhesive onto the second surface of each tape strip so as to coat less adhesive onto a portion ofthe second surface of each tape strip, (iii) pattern coating a low adhesion backsize onto the first surface of each tape strip so as to coat less backsize onto a portion ofthe first surface of each tape strips, etc. Adhesive Tape Flag Pad The adhesive tape flag embodiment of our invention is substantially similar to the adhesive tape strip embodiment, and comprises a leader strip attached to a pad of adhesive tape flags. The pad of flexible adhesive tape flags comprises a plurality of superimposed individual tape flags which form a unitary pad having an uppermost tape flag with an exposed first major surface, and a lowermost tape flag with an exposed second major surface. The first major surface of each tape flag has (i) a first tacky area proximate a first longitudinal end ofthe flag which is coated with a repositionable adhesive, and (ii) a second nontacky area proximate a second longitudinal end ofthe sheet. The leader strip is aligned with and superimposed over a portion ofthe exposed first major surface ofthe uppermost tape strip. A tacky first longitudinal end portion ofthe leader strip is positioned proximate the first longitudinal edge of the pad and adhesively bonded to the exposed first major surface ofthe uppermost tape flag proximate the nontacky second longitudinal end ofthe uppermost tape flag. A nontacky second longitudinal end portion ofthe leader strip is positioned intermediate the first and second longitudinal edges ofthe pad so as to form a nontacky centrally positioned pull tab portion. The pull tab portion does not bond to the pad and can be readily grasped for initiating dispensing of individual tape flags from the pad. The pull tab portion is preferably positioned so that the free longitudinal end ofthe pull tab portion is longitudinally spaced less than about one fifth the complete longitudinal length ofthe pad away from the lateral axis ofthe pad. Continued dispensing ofthe individual tape flags is achieved by (i) adhering the tacky first longitudinal end ofthe second major surface of each individual tape flag in the pad to the first major surface of an immediately underlying tape flag, and (ii) configuring the individual tape flags in the pad so that successive flags in the pad are positioned with the first longitudinal end of each flag alternating between the first and second longitudinal edges ofthe pad. Dispenser The adhesive tape strips pads and adhesive tape flag pads can be conveniently dispensed from a dispenser comprising an enclosure defining a retention chamber into which the pad is inserted. The enclosure has a base, side walls, and a top with a centrally positioned opening having a width which typically extends substantially the entire width ofthe retention chamber and a length which is large enough to permit the passage of a tape strip or flag through the opening yet small enough to prevent the full length of a tape strip or flag from falling back into the retention chamber once a portion ofthe tape strip has been pulled through the opening. A cover may optionally be provided for purposes of sealing the opening through the top ofthe enclosure and exposing the leader strip when the cover is removed. The dispenser may be constructed as a single use dispenser to be discarded when the pad of tape strips or tape flags within the retention chamber are exhausted, or a refiUable dispenser equipped with a mechanism operable for allowing accesses to the retention chamber for purposes of inserting a new pad into the chamber. The dispenser may also be constructed as a shuttling or nonshuttling dispenser, with the length ofthe retention chamber either oversized to permit back and forth shuttling ofthe pad within the chamber as individual tape strips or tape flags are pulled from the pad, or sized to accommodate the pad with substantially no space for back and forth shuttling ofthe pad within the chamber as individual tape strips or tape flags are pulled from the pad. Method of Making Adhesive Tape Strips and Flags The invention includes a method of making the centrally tabbed adhesive tape strips and adhesive tape flags (hereinafter referenced collectively as "adhesive tape") comprising the steps of: (1) conveying a master pad containing a plurality of superimposed adhesively coated sheets in a machine direction, with each sheet having (i) a tacky first major surface; (ii) a nontacky second major surface, and (iii) first and second sides; (2) conveying a continuous length of tabbing material in the machine direction, with the tabbing material having (i) first and second sides; (ii) a first major surface having nontacky side margins and a tacky central area between the side margins coated with an adhesive, and (iii) a nontacky second major surface; (3) laminating the first major surface of a length ofthe tabbing material to the second major surface ofthe uppermost sheet on the master pad, with the tabbing material offset from both sides ofthe master pad so as to define uncovered side margins on the master pad; (4) cutting the tabbed master pad in the machine direction within the tacky portion ofthe tabbing material so as to produce continuous machine direction lengths of tape having (i) a first side portion covered with the adhesive portion ofthe tabbing material, (ii) a second side portion free from tabbing material, and (iii) a nontacky tab intermediate the first and second sides ofthe tape formed from one ofthe nontacky side margins on the tabbing material; and (5) cutting the tabbed master pad in the transverse direction so as to produce tape of a desired width. When two or more lengths of tabbing material are laminated to the master pad ofthe adhesive sheets, the manufacturing process must comply with two additional requirements. First, the lengths of tabbing material must be offset from each other so as to define intermediate gaps between the lengths of tabbing material on the master pad which are not covered with tabbing material. Second, the tabbed master pad must be cut in the machine direction between adjacent pairs of nontacky side margins from different lengths of tabbing material. Brief Description of the Drawings Figure 1 is a perspective view of a first embodiment ofthe invention depicting an adhesive tape strip pad within a closed dispenser. Figure 2 through 6 are enlarged sectional side views ofthe invention shown in Figure 1 illustrating sequential dispensing of adhesive tape strips from the adhesive tape strip pad within the dispenser. Figure 7 is a side view ofthe adhesive tape strip pad shown in Figure 1. Figure 8 is a top view ofthe adhesive tape strip pad shown in Figure 7. Figure 9 is an enlarged and exploded side view of two ofthe adhesive tape strips shown in Figure 7. Figure 10 is a side view of a second embodiment ofthe invention depicting adhesive tape flags within an open dispenser prior to pulling ofthe leader strip from the pad of adhesive tape flags. Figure 11 is a side view ofthe adhesive tape flag pad shown in Figure 10. Figure 12 is a top view ofthe adhesive tape flag pad shown in Figure 11. Figure 13 is an enlarged and exploded side view of one ofthe adhesive tape flags shown in Figure 11. Figure 14 is a top view ofthe leader shown in Figure 2. Figure 15 is an enlarged side view ofthe leader strip shown in Figure 14. Figure 16 is a side view of an adhesive tape strip pad of this invention being inserted into the retention chamber of a refiUable dispenser shown in phantom. Figure 17 is a top view of a first embodiment of a master pad of adhesive sheets to which two lengths of tabbing material have been laminated. Detailed Description of the Invention Including a Best Mode Nomenclature 10 Dispenser Package 20 Adhesive Tape Strip Pad 20x Longitudinal Axis of Adhesive Tape Strip Pad 20y Lateral Axis of Adhesive Tape Strip Pad 21 First Longitudinal Edge of Adhesive Tape Strip Pad 22 Second Longitudinal Edge of Adhesive Tape Strip Pad 30 Individual Adhesive Tape Strips 30s Substrate 30u Uppermost Adhesive Tape Strip 30p Lowermost Adhesive Tape Strip 3 Ox Longitudinal Axis of Adhesive Tape Strips 30y Lateral Axis of Adhesive Tape Strips 31 First Longitudinal End of Adhesive Tape Strip 32 Second Longitudinal End of Adhesive Tape Strip 33 First Lateral Side of Adhesive Tape Strip 34 Second Lateral Side of Adhesive Tape Strip 35 First Major Surface of Adhesive Tape Strip 36 Second Major Surface of Adhesive Tape Strip 40 Adhesive Coating 50 Low Adhesion Backsize Coating 51 Area of Low Adhesion Backsize Pattern Coated for Higher Adhesion 52 Area of Low Adhesion Backsize Pattern Coated for Lower Adhesion 60 Leader Strip 60x Longitudinal Axis of Leader Strip 60y Lateral Axis of Leader Strip 61 First Longitudinal End of Leader Strip 62 Second Longitudinal End of Leader Strip 63 First Lateral Side of Leader Strip 64 Second Lateral Side of Leader Strip 65 First Major Surface of Leader Strip 66 Second Major Surface of Leader Strip 67 Detackifying Coating 68 Tacky Area of First Major Surface of Leader Strip 69 Nontacky Area of First Major Surface of Leader Strip (Pull tab portion) 69y Lateral Axis of Pull tab portion 70 Dispenser 71 Base 72f Front Wall of Dispenser 72b Back Wall of Dispenser 72 Side Walls of Dispenser 73 Top of Dispenser 73f First Side of Dispenser Top 73b Second Side of Dispenser Top 74 Opening in Top of Dispenser 75f First Abutment Surface 75b Second Abutment Surface 76 Retention Chamber 80 Cover 120 Adhesive Tape Flag Pad 120x Longitudinal Axis of Adhesive Tape Flag Pad 120y Lateral Axis of Adhesive Tape Flag Pad 121 First Longitudinal Edge of Adhesive Tape Flag Pad 122 Second Longitudinal Edge of Adhesive Tape Flag Pad 130 Individual Adhesive Tape Flags 130u Uppermost Adhesive Tape Flag 130p Lowermost Adhesive Tape Flag 13 Ox Longitudinal Axis of Adhesive Tape Flags 130y Lateral Axis of Adhesive Tape Flags 131 First Longitudinal End of Adhesive Tape Flags 132 Second Longitudinal End of Adhesive Tape Flags 133 First Lateral Side of Adhesive Tape Flags 134 Second Lateral Side of Adhesive Tape Flags 135 First Major Surface of Adhesive Tape Flags 136 Second Major Surface of Adhesive Tape Flags 138 Tacky Area of First Major Surface of Adhesive Tape Flags 139 Nontacky Area of First Major Surface of Adhesive Tape Flags 140 Adhesive Coating 200 Master Pad 200m Machine Direction 200t Transverse Direction 203 First Side of Master Pad 204 Second Side of Master Pad 205r First Uncovered Side Margin 205 s Second Uncovered Side Margin 206 Uncovered Intermediate Gaps Between Lengths of Tabbing Material 210 Length of Tabbing Material 213 First Side of Tabbing Material 214 Second Side of Tabbing Material 218 Nontacky Side Margins on Tabbing Material 219 Tacky Central Area on Tabbing Material 219x Longitudinal Axis of Tacky Central Area on Tabbing Material 250 Machine Direction Cut Line Definitions The term "major surface" refers the top and bottom surfaces of a sheet, such as the surface ofthe paper sheet upon which these word are printed. As utϋized herein, including the claims, the term "nontacky" means lack of adhesive tack at room temperate and pressure. The term "repositionable adhesive" is a term of art which is utilized herein in accordance with its standard industry meaning. Broadly, a repositionable adhesive is an adhesive which permits typical tape strip and tape flag substrates, such as paper and polymeric films, to be repeatedly attached to and removed from various surfaces, such as paper, without significant loss in adhesive strength, without leaving adhesive residue upon the surface, and without destruction ofthe substrate. The term "tape flag" is a widely used term of art which is utilized herein in accordance with its standard industry meaning. Broadly, a tape flag is a flexible substrate with a first end of a first major surface coated with an adhesive, usually a repositionable adhesive, and a nontacky second end ofthe first major surface. Tape flags are usually rectangular in shape and about 1 to 6 cm wide and about 3 to 10 cm long although other sizes and shapes are certainly possible. The nontacky end ofthe substrate is typically color coded or printed with indicia. A variety of means can be employed to render the second end ofthe first major surface nontacky including (i) limiting application ofthe adhesive coating to only the first end ofthe first major surface, or (ii) allowing the adhesive coating to be applied to the entire surface area ofthe first major surface and then applying a nontacky material, coating or liner over the adhesive at the second end. The term "tape strip" is a widely used term of art which is utilized herein in accordance with its standard industry meaning. Broadly, a tape strip is a flexible substrate with a first major surface coated with an adhesive. Tape strips are usually rectangular in shape and about 1 to 10 cm wide and about 3 to 20 cm long, most frequently about 1 to 5 cm wide and about 3 to 10 cm long, although other sizes and shapes are certainly possible. Construction A unique leader strip 60 is provided for use on adhesive tape strips pads 20 and adhesive tape flag pads 120. The leader strip 60 is simple and inexpensive to manufacture and install on the pads, useful with a variety of different types of dispensers, reliable, and easy for consumers to use. Adhesive Tape Strip Pad Individual Tape Strips As shown in Figures 1 through 9, the adhesive tape strip embodiment ofthe invention comprise a leader strip 60 attached to a pad 20 of adhesive tape strips 30. The adhesive tape strip pad 20 is comprised of a plurality of superimposed individual tape strips 30. The tape strips 30 are constructed from a flexible substrate 30s, such as paper, polyethylene, polypropylene, polyethylene terephthalate, etc. The individual tape strips 30 define a longitudinal axis 30x and a lateral axis 30y and have a first longitudinal end 31, a second longitudinal end 32, a first lateral side 33, a second lateral side 34, a first major surface 35, and a second major surface 36. The first major surface 35 of each tape strip 30 is coated with a low adhesion backsize 50 to facilitate separation ofthe superimposed individual strips 30. The second major surface 36 of each tape strip 30 is coated with an adhesive 40, such as a repositionable adhesive or a permanent pressure sensitive adhesive. Tape Strip Pad The pad 20 of adhesive tape strips 30 defines a longitudinal axis 20x and a lateral axis 20y, and has a first longitudinal edge 21 and a second longitudinal edge 22. The pad 20 has an uppermost tape strip 30u and a lowermost tape strip 30p. The pad 20 is formed from any desired number of individual adhesive tape strips 30, preferably between about 10 and 120 tape strips 30, by adhering the second major surface 36 of each individual tape strip 30 to the first major surface 35 of immediately underlying tape strip 30. The first major surface 35 ofthe tape strips 30 are pattern coated with a low adhesion backsize 50 with a first pattern coating provided over a first area 51 and a second pattern coating provided over a second area 52 ofthe adhesive tape strips 30. The first pattern coating permits a higher adhesion strength than the second pattern coating (i.e., the pattern ofthe first pattern coating covers less surface area than the pattern ofthe second pattern coating). The individual adhesive tape strips 30 are then stacked in a Z pattern with successive strips 30 in the pad 20 positioned with the high adhesion pattern coated area 51 of each strip 30 alternating between the first 21 and the second 22 longitudinal edges of the pad 20. The difference in adhesive strength between the high adhesion pattern coated area 51 and the low adhesion pattern coated area 52 is selected so that the lower adhesive strength portion 52 of each strip 30 will delaminate from the immediately underlying strip 30 when an immediately overlying strip 30 is peeled from the pad 20. The change in adhesive strength can also be achieved by several other mechanisms, including specifically, but not exclusively, (i) coating only a portion of the first major surface 35 of each tape strip 30 with low adhesion backsize 50, (ii) coating only a portion ofthe second major surface 36 of each tape strip 30 with adhesive 40, and (ii) pattern coating the adhesive 40 onto the second major surface 36 of each tape strip 30 in a fashion similar to the pattern coatings ofthe low adhesion backsize 50 described above. Adhesive Tape Flag Pad Individual Tape Flags As shown in Figure 10 through 13, the adhesive tape flag embodiment ofthe invention comprises a leader strip 60 attached to a pad 120 of adhesive tape flags 130. The adhesive tape flag pad 120 is comprised of a plurality of superimposed individual tape flags 130. The tape flags 130 are constructed from a flexible substrate 130s, such as paper, polyethylene, polypropylene, polyethylene terephthalate, etc. The individual tape flags 130 define a longitudinal axis 130x and a lateral axis 130y and have a first longitudinal end 131, a second longitudinal end 132, a first lateral side 133, a second lateral side 134, a first major surface 135, and a second major surface 136. The second major surface 136 of each tape flag 130 is coated with an adhesive 140, usually a repositionable adhesive. A first longitudinal end portion 138 ofthe second major surface 136 of each tape flag 130 is rendered tacky by the adhesive coating 140, while a second longitudinal end portion 139 ofthe second major surface 136 of each tape flag 130 is rendered nontacky by any suitable means such as appUcation of a liner (not shown), application of detackifying particles (not shown), avoiding the initial application of adhesive 140 to the area, etc. This effectively divides the tape flag 130 into a tacky longitudinal end portion 138 and a nontacky longitudinal end portion 139. Tape Flag Pad The pad 120 of adhesive tape flags 130 defines a longitudinal axis 120x and a lateral axis 120y, and has a first longitudinal edge 121 and a second longitudinal edge 122. The pad 120 has an uppermost tape flag 130u and a lowermost tape flag 130p. The pad 120 is formed from any desired number of individual adhesive tape flags 130, preferably between about 10 and 120 tape flags 130, by adhering the second major surface 136 of each individual tape flag 130 to the first major surface 135 of an immediately underlying tape flag 130. The tacky first longitudinal end portion 68 ofthe leader strip 60 is adhesively bonded to the first major surface 35 of the uppermost tape strip 30u while the nontacky second longitudinal end portion 69 defines a pull tab portion 69 which can be lifted from the pad 20 and pulled to initiate dispensing ofthe individual adhesive tape flags 130 from the pad 120. The individual adhesive tape flags 130 are then stacked in a Z pattern with successive flags 130 in the pad 120 positioned with the tacky area 138 of each flag 130 alternating between the first 121 and the second 122 longitudinal edges ofthe pad 120. Such an alternating pattern causes the nontacky area 139 of each flag 130 to be pulled from the surface ofthe pad 120 when an immediately overlying flag 130 is peeled from the pad 120. For purposes of facilitating further discussion ofthe invention, the balance of the discussion will be based upon the adhesive tape strip embodiment only. This is not intended and should not be construed to limit the scope ofthe invention in any way. Leader Strip A leader strip 60 having substantially the same width and about one half to three quarters the length ofthe adhesive tape strip pad 20 is aligned with and superimposed over the first major surface 35 ofthe uppermost tape strip 30u proximate the first longitudinal edge 21 ofthe pad 20. The leader strip 60 defines a longitudinal axis 60x and a lateral axis 60y and has a first longitudinal end 61, a second longitudinal end 62, a first lateral side 63, a second lateral side 64, a first major surface 65, and a second major surface 66. The second major surface 66 ofthe leader strip 60 is coated with an adhesive 40, such as a repositionable adhesive or permanent pressure sensitive adhesive. A detackifying coating 67 is positioned over the adhesive 40 along a first longitudinal end portion 69 ofthe leader strip 60 so as to divide the leader strip 60 into a tacky first longitudinal end portion 68 and a nontacky second longitudinal end portion 69. The tacky first longitudinal end portion 68 ofthe leader strip 60 is adhesively bonded to the first major surface 35 ofthe uppermost tape strip 30u while the nontacky second longitudinal end portion 69 defines a pull tab portion 69 which can be lifted from the pad 20 and pulled to initiate dispensing ofthe individual adhesive tape strips 30 from the pad 20. The first longitudinal end 61 ofthe leader strip 60 is aligned with the first longitudinal edge 21 ofthe pad 21 so as to position the tacky first longitudinal end portion 68 ofthe leader strip 60 proximate the first longitudinal edge ofthe pad. The nontacky second longitudinal end portion 69 ofthe leader strip 60 is positioned intermediate the first 21 and second 22 longitudinal edges ofthe pad 20 so as to form a nontacky centrally positioned pull tab portion 69. The pull tab portion 69 is preferably positioned on the pad 20 so that the free longitudinal end 62 ofthe pull tab portion 69 is longitudinally spaced less than about one fifth ofthe longitudinal length ofthe pad 20 away from the lateral axis 20y ofthe pad 20. More specifically, the pull tab portion 69 is preferably positioned on the pad 20 such that a plane defined by the free longitudinal end 62 ofthe pull tab portion 69 and the lateral axis 20y ofthe pad 20 extends substantially perpendicular to a plane defined by the uppermost tape strip 30u. Alternatively, the pull tab portion 69 is preferably positioned on the pad 20 such that a plane defined by the free longitudinal end 62 ofthe pull tab portion 69 and the lateral axis 20y ofthe pad 20 extends substantially perpendicular to a plane defined by the uppermost tape strip 30u. A third alternative method of measuring the desired position ofthe pull tab portion 69 on the pad 20 longitudinally positions the free longitudinal end 62 ofthe pull tab portion 69 between a first longitudinal boundary defined by the longitudinal position ofthe lateral axis 20y ofthe pad 20, and a second longitudinal boundary extending a distance of about one fifth ofthe longitudinal length ofthe pad 20 from the lateral axis 20y and the pad 20 towards the first longitudinal edge 21 ofthe pad 20. A fourth alternative method of measuring the desired position ofthe pull tab portion 69 on the pad 20 positions the free longitudinal end 61 ofthe pull tab portion 69 proximate the lateral center ofthe opening 74 in the dispenser 70. Dispenser The adhesive tape strip pads 20 and adhesive tape flag pads 120 can be conveniently dispensed from any ofthe commonly used dispensers for such pads. Exemplary dispensers 70 are shown in Figures 1 through 6 (first embodiment) and Figure 10 (second embodiment). The dispensers 70 have a base 71, a front wall 72f, a back wall 72b, side walls 72, and a top 73 split between a first side 73f and a second side 73b by a centrally positioned opening 74 which extends substantially the entire width ofthe retention chamber 76 defined by the dispenser 70. The length of the opening 74 is large enough to permit the passage of a tape strip 30 through the opening 74 yet small enough to prevent the full length of a tape strip 30 from falling back into the retention chamber 76 once a portion ofthe tape strip 30 has been pulled through the opening 74. As shown best in Figures 4 through 6, removal of a tape strip 30 from the dispenser 70 causes an end portion (unnumbered) ofthe immediately underlying a tape strip 30 to be puUed through the opening 74 and rest upon one ofthe abutment surfaces 74r and 74s where it is presented for future removal from the dispenser 70. A cover 80 seals the opening 74 through the top 73 ofthe dispenser 70. The center tabbed pads 20 of this invention are particularly useful in connection with open throat dispensers, such as shown in Figures 1 through 6 and 10, in which the opening 74 in the top 73 ofthe dispenser 70 is of sufficient size, generally about one third to three fourths the length ofthe pad retained within the dispenser 70, to permit a user to read through the opening 74 and into the retention chamber 76 to access the pull tab portion 69 on the leader strip 60. Alternatively, although less preferred, the pull tab portion 69 on the leader strip 60 may be attached to the cover 80 so that the leader strip 60 is pulled from the dispenser 70, along with a portion ofthe uppermost adhesive tape strip 30u, when the cover 80 is removed from the dispenser 70. Use of such an alternative embodiment is necessary when the opening 74 in the top 73 ofthe dispenser 70 is less than about 2 cm since a user cannot reach into the retention chamber 76 to access the pull tab portion 69. Due to the necessity of a larger opening 74 in nonshuttling dispensers 70, the pad 20 should be adhered to the base 71 ofthe dispenser 70 in order to prevent the pad 20 from being pulled through the opening 74 when individual strips 30 are pulled from the pad 20. The dispenser 70 may be constructed as a single use dispenser to be discarded when the pad 20 of tape strips 30 or pad 120 of tape flags 130 within the retention chamber 76 are exhausted, or a refiUable dispenser, such as shown in phantom on Figure 16, equipped with a mechanism operable for allowing accesses to the retention chamber 76 for purposes of inserting a new pad 20, 120 into the chamber 76. The center tabbed leader strip 60 provides the advantage of allowing the pad 20 to be partially inserted into the dispenser 70 with the pull tab portion 69 resting against the first abutment surface 75f while the operator presses down on the other end ofthe pad 20 and closes the chamber door (unnumbered). The dispenser 70 may be constructed as a shuttling dispenser or a nonshuttling dispenser. As shown in Figure 16, a shuttling dispenser 70 has a retention chamber 76 with a length which permits the pad 20 within the chamber 76 to shuttle back and forth within the chamber 76 as individual tape strips 30 are pulled from the pad 20. Alternatively, as shown in Figures 1 through 6 and 10, a nonshuttling dispenser 70 has a retention chamber 76 which is sized to accommodate a pad 20 with substantially no space for back and forth shuttling ofthe pad 20 within the chamber 76 as individual tape strips 30 are pulled from the pad 20. Method of Making The center tabbed adhesive tape strip pads 20 of this invention, as weU as center tabbed adhesive tape flags pads 120, may be quickly, easily and reliably manufactured from large master pads 200 ofthe type commonly utilized to produce standard adhesive tape strip pads. The center tabbed aspect ofthe invention may be conveniently added to a master pad 200 using lengths of tabbing material 210 which are configures with (i) first 213 and second 214 sides; (ii) a first major surface (not shown) having nontacky first and second side margins 218 and an adhesively coated tacky central area 219 between the side margins, and (iii) a nontacky second major surface (not shown). The procedure for applying the lengths of tabbing material 210 to a master pad 200 and cutting the resultant tabbed master pad 200 to produce the desired adhesive tape strip pads 20 includes the steps of (1) conveying a master pad 200 of superimposed adhesively coated sheets in a machine direction 200m; (2) simultaneously conveying continuous lengths of tabbing material 210 in the machine direction 200m, (3) laminating the first major surface (not shown) of each length of tabbing material 210 to the exposed second major surface (unnumbered) ofthe uppermost sheet (unnumbered) on the master pad 200, with the lengths of tabbing material 210 laterally positioned on the master pad 200 so as to create side margins 205 and intermediate gaps 206 between neighboring lengths of tabbing material 210 which are not covered with tabbing material 210; (4) cutting the tabbed master pad 200 in the machine direction 200m along the central longitudinal axis 219x ofthe tacky portion 219 ofthe tabbing material 210 and along a line which is centrally positioned within the intermediate gaps 206 between lengths of tabbing material 210 so as to produce continuous machine direction lengths of tape; and (5) cutting the tabbed master pad in the transverse direction 200t so as to produce tape strip pads 20 ofthe desired width. The lateral length ofthe side margins 205 on the master pad 200 which are not covered with tabbing material 210 are preferably about one third to one half the lateral length ofthe tacky central area 219 on the tabbing material 210 in order to result in proper positioning ofthe nontacky side margins 218 on the resultant adhesive tape strip pads 20 which include such side margins 205. For the same reason, the intermediate gaps 206 between neighboring lengths of tabbing material 210 on the master pad 200 which are not covered with tabbing material 210 are preferably about the same lateral length as the tacky central area 219 on the tabbing material 210. Method of Using Use of a dispenser package 10 containing the center tabbed adhesive tape strip pad 20 ofthe invention is illustrated in Figures 2 through 6. First, the cover 80 is removed from the dispenser 70 (Figure 3). The exposed pull tab portion 69 is then gripped with the thumb and pointer finger and pulled through the opening 74 in the top 73 ofthe dispenser 70 (Figure 4) until the leader strip 60 is pulled completely out ofthe retention chamber 76 (Figure 5). This causes a first longitudinal end 31 ofthe uppermost adhesive tape strip 30u to be pulled through the opening 74 in the top 73 ofthe dispenser 70 (Figure 5) and rest against the second abutment surface 75b on the dispenser 70 once the leader strip 60 is fully detached (Figure 6).

Claims: We claim: 1. An adhesive tape strip pad comprising: (a) a plurality of superimposed tape strips wherein the tape strips include: (1) a flexible substrate having first and second major surfaces; (2) a low adhesion backsize coated onto the first major surface of the substrate; and (3) an adhesive coated onto the second major surface ofthe substrate; (4) with the plurality of superimposed tape strips forming a unitary pad having (i) a first longitudinal edge, (ii) a second longitudinal edge, (iii) an uppermost tape strip having an exposed first major surface, and (iv) a lowermost tape strip having an exposed second major surface; and (b) a leader strip aligned with and superimposed over a longitudinal portion ofthe exposed first major surface ofthe uppermost tape strip wherein: (1) a tacky longitudinal end portion ofthe leader strip is positioned over and adhesively bonded to the longitudinal end ofthe exposed first major surface ofthe uppermost tape strip, and (2) a nontacky longitudinal end portion ofthe leader strip is positioned intermediate the first and second longitudinal edges ofthe pad so as to form a nontacky centrally positioned pull tab portion. 2. An adhesive flag pad comprising: (a) a plurality of superimposed tape flags wherein: (1) each flag is comprised of a flexible substrate having first and second major surface, with the first major surface having (i) a tacky area proximate a first longitudinal end ofthe flag which is coated with an adhesive, and (ii) a nontacky area proximate a second longitudinal end ofthe flag; and (2) the plurality of superimposed flags form a unitary pad having (i) a first longitudinal edge, (ii) a second longitudinal edge, (iii) an uppermost tape flag with an exposed first major surface, and (iv) a lowermost tape flag with an exposed second major surface; and (b) a leader strip aligned with and superimposed over a longitudinal end portion ofthe exposed first major surface ofthe uppermost tape flag, wherein (1) a tacky longitudinal end portion ofthe leader strip is positioned over and adhesively bonded to the longitudinal end ofthe exposed first major surface ofthe uppermost tape flag proximate the second longitudinal edge portion ofthe uppermost tape flag; and (2) a nontacky longitudinal end portion ofthe leader strip is positioned intermediate the first and second longitudinal edges ofthe pad so as to form a nontacky centrally positioned pull tab portion. 3. The pad of claim 1 wherein: (a) each tape strip adheres to the first major surface of an immediately underlying strip with a first adhesive strength, except for a selected area proximate one ofthe longitudinal edges ofthe strip which adheres to the first major surface ofthe immediately underlying strip with a second adhesive strength; (b) each successive strip in the pad is positioned so that the selected area of each strip alternates between the first and second longitudinal edges ofthe pad; and (c) the second adhesive strength is sufficiently less than the first adhesive strength that the selected portion of each strip delaminates from the immediately underlying strip when an immediately overlying strip is peeled from the pad. 4. The pad of claim 3 wherein (a) the adhesive is pattern coated onto the second major surface of each tape strip so as to define; (1) a primary area ofthe strip proximate one ofthe longitudinal ends ofthe strip having a primary adhesive coating pattern, and (2) a secondary area ofthe strip proximate the other longitudinal end ofthe strip having a secondary adhesive coating pattern, (3) whereby the primary area of each tape strip adheres to an immediately underlying strip at the first adhesive strength, and the secondary area of each tape strip adheres to an immediately underlying sheet at the secondary adhesive strength; (b) the strips are positioned within the pad so that the secondary area of each successive strip alternates between the first and second longitudinal edges ofthe pad; and (c) the second adhesive strength is sufficiently less than the first adhesive strength that the secondary area of each strip delaminates from the immediately underlying strip when an immediately overlying strip is peeled from the pad. 5. The pad of claim 3 wherein: (a) the low adhesion backsize is pattern coated onto the first major surface of each tape strip so as to define; (1) a primary area on the first major surface of each strip proximate one ofthe longitudinal edges ofthe strip having a primary coating pattern, and (2) a secondary area on the first major surface of each strip proximate the other longitudinal edge ofthe strip having a secondary coating pattern, (3) whereby each tape strip adheres to the primary area ofthe immediately underlying strip at the first adhesive strength, and adheres to the secondary area ofthe immediately underlying strip at the secondary adhesive strength; (b) the strips are positioned within the pad so that the secondary area of each successive strip alternates between the first and second longitudinal edges ofthe pad; and (c) the second adhesive strength is sufficiently less than the first adhesive strength that the secondary area of each strip delaminates from the immediately underlying strip when an immediately overlying strip is peeled from the pad. 6. The pad of claim 1 wherein (i) the pad has a longitudinal length and a lateral axis, and (ii) the first longitudinal end ofthe pull tab portion is longitudinally positioned a distance of less than about one fifth the longitudinal length ofthe pad away from the lateral axis ofthe pad. 7. The pad of claim 2 wherein (i) the pad has a longitudinal length and a lateral axis, and (ii) the first longitudinal end ofthe puU tab portion is longitudinally positioned a distance of less than about one fifth the longitudinal length ofthe pad away from the lateral axis ofthe pad. 8. The pad of claim 6 wherein (i) the pull tab portion has a lateral axis, and (ii) the pull tab portion is positioned relative to the pad such that a plane defined by the lateral axis ofthe pull tab portion and the lateral axis ofthe pad extends substantially perpendicular to a plane defined by the uppermost tape strip. 9. The pad of claim 7 wherein (i) the pull tab portion has a lateral axis, and (ii) the pull tab portion is positioned relative to the pad such that a plane defined by the lateral axis ofthe pull tab portion and the lateral axis ofthe pad extends substantially perpendicular to a plane defined by the uppermost flag. 10. The pad of claim 6 wherein the pull tab portion is positioned relative to the pad such that a plane defined by the first longitudinal end ofthe pull tab portion and the lateral axis ofthe pad extends substantially perpendicular to a plane defined by the uppermost tape strip. 11. The pad of claim 7 wherein the pull tab portion is positioned relative to the pad such that a plane defined by the first longitudinal end ofthe pull tab portion and the lateral axis ofthe pad extends substantially perpendicular to a plane defined by the uppermost flag. 12. The pad of claim 1 wherein (i) the pad has a lateral axis, and (ii) the first longitudinal end ofthe pull tab portion is longitudinally positioned between a first longitudinal boundary defined by the longitudinal position ofthe lateral axis ofthe pad, and a second longitudinal boundary extending a distance of about one fifth of the longitudinal length ofthe pad from the lateral axis ofthe pad towards the first longitudinal edge ofthe pad. 13. The pad of claim 2 wherein (i) the pad has a lateral axis, and (ii) the first longitudinal end ofthe pull tab portion is longitudinally positioned between a first longitudinal boundary defined by the longitudinal position ofthe lateral axis ofthe pad, and a second longitudinal boundary extending a distance of about one fifth of the longitudinal length ofthe pad away from the lateral axis ofthe pad towards the first longitudinal edge ofthe pad. 14. A product comprising: (a) an enclosure which (i) defines a retention chamber of defined length, width and depth, and (ii) has (A) a base, (B) side waUs, (C) a top, and (D) a centrally positioned opening through the top having a width which extends substantially the entire width ofthe retention chamber; (b) the tape strip pad of claim 1 retained within the retention chamber; and (c) a cover effective for (i) removably sealing the opening through the top ofthe enclosure, and (ii) being removed from the enclosure without automatically pulling the leader strip; (d) wherein the length ofthe opening through the top ofthe enclosure is large enough to permit the passage of a tape strip through the opening and small enough to prevent the full length of a tape strip from falling back into the retention chamber once a portion ofthe tape strip has been pulled through the opening. 15. The product of claim 14 wherein (i) the tape strip has a defined length, width and depth, and (ii) the length ofthe retention chamber is between about V/i to 2 times greater than the length ofthe tape strip pad so as to permit the tape strip pad to shuttle within the retention chamber as individual tape strips are pulled from the pad through the opening in the top ofthe enclosure. 16. The product of claim 14 wherein the length ofthe centrally positioned opening through the top is between about one third to about three fourths the length of the tape pad. 17. The product of claim 14 wherein the tape strip pad is adhered to the base of the enclosure. 18. A product comprising: (a) an enclosure which (i) defines a retention chamber of defined length, width and depth, and (ii) has (A) a base, (B) side walls, (C) a top, and (D) a centrally positioned opening through the top having a width which extends substantially the entire width ofthe retention chamber; (b) the tape flag pad of claim 2 retained within the retention chamber; and (c) a cover effective for (i) removably sealing the opening through the top ofthe enclosure, and (ii) being removed from the enclosure without automatically pulling the leader strip; (d) wherein the length ofthe opening through the top ofthe enclosure is large enough to permit the passage of a tape flag through the opening and small enough to prevent the full length of a tape flag from falling back into the retention chamber once a portion ofthe tape flag has been pulled through the opening. 19. The product of claim 18 wherein (i) the tape flag pad has a defined length, width and depth, and (ii) the length ofthe retention chamber is between about Wi to 2 times greater than the length ofthe tape flag pad so as to permit the tape flag pad to shuttle within the retention chamber as individual tape flags are pulled from the pad through the opening in the top ofthe enclosure. 20. The product of claim 18 wherein the length ofthe centrally positioned opening through the top is between about 1 to 5 mm. 21. The product of claim 18 wherein the tape strip pad is adhered to the base of the enclosure. 22. A product comprising: (a) an enclosure which (i) defines a retention chamber of defined length, width and depth, and (ii) has (A) a base, (B) side walls, (C) a top, and (D) a centrally positioned opening through the top having a width which extends substantially the entire width ofthe retention chamber; (b) the tape strip pad of claim 3 retained within the retention chamber; and (c) a cover effective for (i) removably sealing the opening through the top ofthe enclosure, and (ii) being removed from the enclosure without automatically pulling the leader strip; (d) wherein the length ofthe opening through the top ofthe enclosure is large enough to permit the passage of a tape strip through the opening and small enough to prevent the full length of a tape strip from falling back into the retention chamber once a portion ofthe tape strip has been pulled through the opening. 23. A method of making a centrally tabbed adhesive tape pad comprising: (a) conveying a master pad containing a plurality of superimposed adhesively coated sheets in a machine direction, each sheet of adhesive tape having (i) a tacky first major surface, (ii) a nontacky second major surface, and (iii) first and second sides; (b) conveying a continuous length of a tabbed leader strip in the machine direction, wherein the tabbed leader strip has (i) first and second longitudinal ends, and (ii) a first major surface having a tacky longitudinal end portion proximate the first longitudinal end and a nontacky longitudinal end portion proximate the second longitudinal end; (c) laminating the first major surface ofthe tabbed leader strip to the second major surface ofthe uppermost sheet of adhesive tape on the master pad, with the first longitudinal end ofthe tabbed leader strip aligned with the first side ofthe master pad and the nontacky longitudinal end portion positioned intermediate the first and second sides ofthe master pad; and (d) cutting the tabbed master pad in a transverse direction so as to produce tape of a desired width. 24. A method of making a centrally tabbed adhesive tape pad comprising: (a) conveying a master pad containing a plurality of superimposed adhesively coated sheets in a machine direction, each sheet of adhesive tape having (i) a tacky first major surface, (ii) a nontacky second major surface, and (iii) first and second sides; (b) conveying a continuous length of tabbing material in the machine direction, wherein the tabbing material has (i) first and second sides; (ii) a first major surface having nontacky side margins and a area between the side margins having an exposed adhesive coating, and (iii) a nontacky second major surface; (c) laminating the first major surface of a length ofthe tabbing material to the second major surface ofthe uppermost sheet of adhesive tape on the master pad, with the tabbing material offset from both sides ofthe master pad so as to define uncovered side margins on the master pad; and (d) cutting the tabbed master pad (1) in the machine direction within the tacky portion ofthe tabbing material on the master pad so as to produce continuous machine direction lengths of tape having (i) a first side portion covered with the adhesive portion ofthe tabbing material, (ii) a second side portion free from tabbing material, and (iii) a nontacky tab intermediate the first and second sides ofthe tape formed from one ofthe nontacky side margins on the tabbing material; and (2) in a transverse direction so as to produce tape of a desired width. 25. A method of making a centrally tabbed adhesive tape pad comprising: (a) conveying a master pad containing a plurality of superimposed adhesively coated sheets in a machine direction, each sheet of adhesive tape having (i) a tacky first major surface, (ii) a nontacky second major surface, and (iii) first and second sides; (b) conveying at least two continuous lengths of tabbing material in the machine direction, wherein each length of tabbing material has (i) first and second sides; (ii) a first major surface having nontacky side margins and a central area between the side margins having an exposed adhesive coating, and (iii) a nontacky second major surface; (c) laminating the first major surface of each length of tabbing material to the second major surface ofthe uppermost sheet of adhesive tape on the master pad, with the tabbing material (i) offset from both sides of the master pad so as to define uncovered side margins on the master pad; and (ii) offset from each other so as to define uncovered intermediate gaps between the lengths of tabbing material on the master pad; (d) cutting the tabbed master pad (1) in the machine direction within the tacky portion of each length of tabbing material and within the intermediate gap between adjacent lengths of tabbing material on the master pad so as to produce tape having (i) a first side portion covered 5 with the adhesive portion ofthe tabbing material, (ii) a second side portion free from tabbing material, formed from either one ofthe uncovered side margins or a portion of one ofthe uncovered intermediate gaps, and (iii) a nontacky tab intermediate the first and second sides ofthe tape, formed 10 from one ofthe nontacky side margins on the tabbing material; and (2) in a transverse direction so as to produce tape of a desired width.

Inventors: CALLAHAN JOSEPH P JR, SAMUELSON BRUCE E, CALLAHAN, JOSEPH, P., JR., SAMUELSON, BRUCE, E.
Applicants: MINNESOTA MINING & MFG, MINNESOTA MINING AND MANUFACTURING COMPANY
Application year: 1996
Main classification: B42D5
IPC codes: B42D5, B65D83