EP1597061B1

EP1597061B1 - Label sheet design for easy removal of labels

Info

Publication number: EP1597061B1
Application number: EP03713742.9A
Authority: EP
Inventors: Galen Wong; Steven C. Weirather; Jerry G. Hodsdon; Inge Bachner; Martin Utz
Original assignee: Avery Dennison Corp
Current assignee: CCL Label Inc
Priority date: 2003-02-28
Filing date: 2003-02-28
Publication date: 2014-05-07
Anticipated expiration: 2023-02-28
Also published as: AU2003217779A1; EP2277689B1; AU2003217779B2; ES2489515T3; JP2006514335A; AU2008243283B2; EP2277689A1; CN1744987A; JP4029353B2; CN100504964C; EP1597061A1; MXPA05008849A; CA2512250A1; EP1597061A4; CA2512250C; DK1597061T3; WO2004078468A1; AU2008243283A1

Description

RELATED APPLICATIONS

None.

FIELD OF THE INVENTION

The present invention relates to label sheets. More particularly, the present invention relates to a design for label sheets in which the labels may be easily removed.

BACKGROUND OF THE INVENTION

Address labels on printable 8½ x 11 and A4 sheets have been in use for a number of years as a means of printing a medium to large number of addresses or other information in a relatively short period of time. After the label sheets have been printed, these labels must then be removed from the sheet and applied to an envelope or other substrate. The standard method for removing the labels by hand is that the user bends back the label sheet somewhere in the vicinity of one of the edges or corners of the first label to be removed. This causes a separation between the label and the liner. The user grasps the label in the area where the separation has been created, and removes the label from the sheet. This operation is then repeated for each label. This operation can be somewhat difficult and time consuming, and requires a fair amount of manual dexterity. In addition, some combinations of materials such as a thin or flexible face and thick paper liner can be difficult to die cut without cutting into the liner. When the die cut extends into the liner, the user can accidentally tear off a section of the liner in the process of removing the label from the liner.
Label strips or webs have also been invented for use with automated label removal and placement machinery. U.S. Patent No. 5,788,284 issued to Hirst discloses a label strip with a cut running down the centerline of the release liner and underneath the center of the individual labels, The label strip moves over a V-shaped notch in a separator plate, thereby automatically separating the labels from the release liner.
U.S. Patent No. 5,182,152 issued to Ericson discloses a Bible index label dispensing sheet having a weakened line in the backing and fold lines in the individual labels. A release strip overlies the weakened backing line on one side of each horizontal row of labels. The release strip acts as an adhesive tape to prevent premature rupture of the sheet. The user grasps and pulls away the release strip, and tears off the backing from a portion of the horizontal row of labels.
WO 01/84550 (Neato (UK) Limited) discloses six die-cut CD-ROM labels provided on a sheet backing in a vertical pattern with labels offset from a scored or perforated centerline of the other three. Each set of three is spaced from the outer edges of the sheet and by folding the sheet in half and removing a corner tab an adhesive edge of one of the labels is exposed which can be applied to a disk manually held on a printed outline of the disk on the back of the sheet. Vertical die cuts are provided in the backing which are contiguous with micro-perforated tear lines in the sheet.
WO 99/31644 (Dry Label Denmark Aps) discloses a label assembly comprising a support sheet of a paper material or paper-like material an adhesive coating of a non-permanent adhesive material applied to one side of the support sheet, and a printing paper of a paper material or paper-like material defining opposite front and rear surfaces. The rear surface of the printing paper is releasably fixated to the support sheet in facial contact therewith through the adhesive coating and the printing paper is divided into individual paper labels or paper tags which are individually removable from the support sheet The support sheet is divided into individual support sheet sections. The label assembly is readily printable in a laser jet or any similar printing machine such as an ink jet printer or a type-writer.

SUMMARY OF THE INVENTION

The present invention provides a label sheet assembly which may be fed through a printer such as a laser printer, an ink jet printer, or other printer attached to a personal computer, for desktop printability. Thereafter, a narrow strip of the release liner can be tom off in a single motion. This exposes a narrow strip of each label within a row or column of labels, allowing the labels to be easily removed and placed on some other object or substrate one-by-one. In a label sheet which has a border or matrix surrounding the labels and/or running between the labels or portions of the labels, both the release liner and the matrix have weakened separation lines therein. The separation lines are formed by a series of cuts and ties in the release liner and in the matrix. The ties are preferably strongest near the edges of the sheet and weaker in the interior portion of the sheet. This allows the sheet to resist tearing along the weakened separation lines due to normal handling or printing in the printer, but once the tearing has begun the tearing continues easily until an entire strip of the release liner has been stripped away. A notch is preferably formed in a release liner and the matrix if applicable at each end of the weakened separation line. The notch is aligned with the weakened separation lines in both the liner and in the matrix. The notch helps to ensure that tearing will begin along the weakened separation lines. The two separation lines are sufficiently close together that the user can tear away the strip of release liner from the remainder of the sheet in a single motion without having to remove a separate release strip, and the tearing, once begun, will continue until the release liner is torn entirely away from the remainder of the sheet. The size of the cuts and the size of the ties are chosen so that the assembly is strong enough to be fed through a printer such as a laser printer or an ink jet printer, but weak enough so that the user can tear off the release liner strip along the separation line in an easy and fluid motion without any other mechanical preparation of the label sheet between the printing and the tearing steps. The ratio of cut length to overall separation line length is greater than 95% to ensure ease of separation. Preferably, the separation line lies approximately 0.6 centimeters (approximately ½ inch) from the edge of a column or column of labels. In this way there is sufficient overhang of the exposed portion of the labels that a user can easily grasp the labels, but a sheet of labels which has had one column or column of labels partially exposed will not have so much exposed adhesive area that the label sheet will readily stick to a desk or other surface on which the label sheet is placed.
In one aspect therefore the invention is of a label sheet assembly modified for easy removal of labels by hand, comprising a release liner and a sheet of facestock material releasably adhered to the release liner, the facestock material including at least a first column of labels formed therein and a matrix at least partially bordering the labels, wherein a first weakened separation line is formed in the release liner below the column of labels and offset from a center of the column of labels toward an edge of the labels, and a second weakened separation line is formed in the matrix running generally parallel to the first weakened separation line. The release liner has a notch aligned with the two weakened separation lines, and preferably a notch at either end of the separation lines. The weakened separation lines are offset from each other by a short distance so that a user can tear off a strip of the liner and a strip of the matrix in a single motion leaving each label within the column of labels with a portion of its liner removed, thereby allowing easy removal of the labels from the label sheet assembly after the tearing operation without the need for the user to perform any other physical preparation of the label sheet between the printing and tearing operations. The weakened separation lines are preferably formed by cuts and ties in the liners and cuts and ties in the matrix when present, with the strongest of the ties being positioned next to the edges of the assembly or the notch when present. For label sheets having multiple
columns of labels, the sheet has a weakened separation line in the liner and in the matrix when present below each column of labels.
Exemplary embodiments of the invention will be further described below with reference to the drawings, in which like numbers refer to like parts.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a plan view of the label sheet according to a first embodiment of the present invention.
FIG. 2 is a close up of the lower right hand corner of the label sheet of FIG. 1.
FIG. 3 shows the back side of the portion of the label sheet shown in FIG. 2.
FIG. 4 shows a first method of using the label sheet of FIG. 1.
FIG. 5 shows the label sheet of FIG. 4 after strip 26 has been completely removed.
FIG. 6 shows a second method of using the label sheet of FIG. 1.
FIG. 7 shows a label sheet according to a second embodiment of the present invention.
FIG. 8 illustrates a third embodiment of the invention without notches at the edges of the assembly.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

FIG. 1 shows label sheet assembly 10 in which the labels can be easily peeled according to a first embodiment of the present invention. The label assembly 10 is preferably of an overall standard size such as 8-1/2 inches by 11 inches, or A4 (approximately 21 cm x 29.7 cm), or 4 inches by 6 inches, or other size compatible with standard printers used with personal computers. Assembly 10 includes a release liner sheet or simply release liner 16 with a sheet of facestock material releasably adhered thereto via a pressure sensitive adhesive. The release liner 16 is coated with a thin layer of release material such as silicone, or is otherwise constructed or treated such that the labels can be easily removed therefrom. The sheet of facestock material comprises a generally rectangular sheet of paper or film facestock with a plurality of labels 12 formed therein such as by die cutting. The section of the facestock sheet not used for labels constitutes the border or matrix 14. In the figure the facestock sheet is shown smaller than the release liner 16, although it is not necessary that the facestock sheet be smaller than the release liner. Additionally, although the assembly 10 is shown with a matrix, it is not necessary for the invention that the label assembly 10 includes a matrix 14 surrounding and/or between labels 12.
FIG. 2 shows a close up of the lower right hand corner of the label assembly 10 of FIG. 1. The matrix 14 has a weakened separation line 20 formed therein near one edge of the column of labels. Matrix separation line 20 includes a plurality of cuts 22 and a plurality of small ties 24. The liner includes a weakened separation line 30 which is shown in phantom in FIG. 2. This weakened separation line or liner separation line 30 runs generally from one edge of the assembly 10 to an opposite edge of the assembly 10 and runs preferably linearly beneath labels 12 along a column of labels, near an edge of the labels. Preferably liner separation line 30 runs less than one centimeter from the edge of the labels, and more preferably approximately 0.6 centimeters (approximately ¼ inch) from the edge of the labels. Liner separation line 30 is shown running vertically underneath a column of labels; however, the assembly can alternatively be constructed such that the separation lines run horizontally beneath a row of labels. Liner 16 also optionally includes a notch 18 generally in alignment with the liner separation line 30 and the cuts and ties 22/24 in matrix 14. As shown in FIG. 1, a similar structure of weakened separation lines and notches is created at the top right hand corner of the assembly. Additionally, assembly 10 includes two other sets of weakened separation lines and notches, one set for each column of labels with the weakened separation lines running underneath the column of labels at approximately 0.6 centimeters from one edge thereof. If the assembly 10 had been laid out to include a different number of columns of labels, e.g. two columns, four columns, five columns, etc., the assembly would include a corresponding number of sets of separation lines and notches. Arrows printed on the facestock material instruct or encourage the user to begin tearing the assembly at notches 18. Alternatively, other instructional indicia or written instructions, such as the words "Tear Here" or the like, could be printed on the assembly.
The distance between liner separation line 30 and the cuts and ties 22/24 in the matrix which form matrix separation line 20 is exaggerated in the figures for illustration purposes. The separation lines in the liner and in the matrix are preferably placed close enough together such that, after assembly 10 has been printed on by a printer, a user can tear off the strip 26 of liner and matrix as illustrated in FIG. 4 in a single fluid motion without any further physical preparation of assembly 10 being required between the printing and the tearing steps. At the same time, the separation lines are slightly separated so that the portion of the matrix overtying liner separation line 30 helps to keep liner 16 from prematurely tearing, and the portion of the liner underneath matrix separation line 20 helps to keep the matrix from prematurely tearing. Another reason for offsetting the two separation lines has to do with the manufacturing process. If the separation line in the facestock were to be die cut directly over the separation line in the liner, the die pressing into the facestock would have a tendency to deform the facestock material rather than cut cleanly into it because there would be insufficient liner strength to support the dies cutting into the facestock. Therefore, the two separation lines are preferably offset by enough distance such that normal manufacturing tolerances are unlikely to produce a cut-on-cut situation. Preferably, matrix separation line 20 is offset the liner separation line 30 by less than 5 mm; more preferably, the two are separated by less than 2 mm; more preferably still, the two are separated by less than 1 mm. It has been found that an offset distance of approximately 0.5 mm produces good results for typical sheets of paper labels. However, the exact separation distance is not critical. Furthermore, the preferred separation distance can vary depending upon the thickness and strength of the liner and matrix, the strength of the pressure sensitive adhesive and the effectiveness of the release liner, the overall size of the assembly, and other factors.
FIG. 3 shows the back side of the lower right hand corner of the label assembly 10 illustrated in FIG. 2. Liner separation line 30 is illustrated in greater detail. It includes a plurality of cuts 32, and plurality of ties 36 and 38. In the embodiment shown two small ties 36 lie underneath the matrix, and one small tie 38 lies underneath each label 12. The particular locations of the ties are not critical. Additionally, release liner 16 includes a large tie 31 near notch 18 or, if no notch is present, near the edge of release liner 16.
Both the matrix separation line 20 and the liner separation line 30 run parallel to the edge of a column of labels and disposed about 0.6 centimeters from the edge of the column. The exact distance is not critical. Preferably, however, the separation lines are offset from the edge of the column of labels far enough so that when strip 26 is removed labels 12 can be easily grasped and removed by the user. At the same time, the separation lines are close enough to the edge of the labels such that when strip 26 is removed a narrow enough edge of the labels is exposed so that when the label sheet is placed onto a table or similar surface, the exposed edge of the unremoved labels 12 do not easily and inadvertently stick to the table.
The purpose of these structures will now be described with reference to FIGS. 3, 4 and 5. FIG. 4 shows one method of using the label sheet assembly of FIG. 1. For purposes of this discussion, it will be assumed that the upper right hand corner of label assembly 10 has a structure that is the mirror image of the structure shown in FIG. 2, with corresponding parts having the same reference designators. The user grasps one corner of label assembly 10 at approximately position 27 with one thumb and forefinger, and with the other thumb and forefinger grasps the narrow strip 26 of release liner and matrix so as to focus the shear forces at notch 18 and large tie 31, and begins tearing strip 26 away from the rest of the sheet. After large tie 31 is broken, the tearing away of matrix liner strip 26 progresses relatively easily through small ties 36 and 38 within release liner 16, and through small ties 24 within matrix 14, until strip 26 is completely tom off. This leaves the label assembly 10 as shown in FIG. 5. i.e., with one column of labels 12 mostly attached to the release liner 16 but having a relatively narrow strip of the labels with the underlying liner portion removed. The user can then easily peel off the individual labels 12 by hand one-by-one as desired without having to bend and manipulate the assembly 10 each time the user wishes to remove the next label.
FIG. 6 shows a second method of using label sheet assembly 10 of FIG. 1. The assembly includes three sets of vertical separation lines, one set of separation lines associated with each column of labels. The separation lines divide the assembly into three individual portions 40, 50 and 60 which may be individually separated from each other. In FIG. 6, the left hand portion 40 has been separated from the center portion 50 and right hand portion 60. The labels within left hand portion 40 are now ready to be easily peeled one by one from the liner and applied to envelopes or other substrate. Sections 50 and 60 do not have any portions of the labels with their adhesive sides exposed. Thus, portions 50 and 60 can be handled and/or stored for later use without any degradation of the adhesive on the backs of those labels. Remaining portion 50/60 could even be fed through a printer for later printing. For example, if only ten or fewer labels needed to be printed and used, the user could run assembly 10 through the printer and print only on labels within the column of labels in section 40. The user would then separate section 40 and use the labels within that section. Remaining sections 50/60 would be stored for later use. When additional labels are ready to be printed, the label assembly could be fed through the printer beginning with the right hand edge of section 60. Alternatively, the software could be instructed to shift the printing of labels over to the right slightly from the normal position, such that section 50/60 could be fed through the printer beginning with the left hand side of section 50. The software could be commanded to make such an adjustment by a selectable software switch or option. Using this latter method, a first column of labels 40 could be printed, tom off, and used; at a later time a second column of labels 50 could be printed, tom off, and used; and at a later time still a third column of labels 60 could be printed and used.
Of course, the labels on the label sheet need not be generally rectangular in shape and butting against each other as in the first embodiment shown in FIG. 1. The labels could be virtually any shape and could be completely separated from each other by matrix therebetween or by bare liner. FIG. 7 shows one such possibility in which the labels are round and slightly separated one from another.
The size of the cuts and the size of the ties are chosen so that the assembly is strong enough to be fed through a printer such as a laser printer or an ink jet printer, but weak enough so that the user can tear off the release liner strip along the separation line in an easy and fluid motion without any other mechanical preparation of the label sheet between the printing and the tearing steps. The ratio of cut length to overall separation line length is greater than 95% to ensure ease of separation. It has been found that an average tensile strength of the facestock and liner along the separation lines of 6 gm/cm produces good results, and it is expected that values of about 4 gm/cm to 10 gm/cm would also produce good results, and that value of about 2 gm/cm to 15 gm/cm would also be acceptable.
FIG. 8 shows a third embodiment similar to the embodiment shown in FIG. 1, except that the label assembly does not include notches.
As shown in FIGS. 1 and 2, the facestock material is slightly smaller than the liner 16 such that matrix 14 does not extend to the edge of the label assembly. If the facestock were to extend to the edge of the label sheet, it would be desirable to form notch 18 in both matrix 14 and liner 16.
In yet another possible embodiment, the label assembly would not even include a matrix bordering the labels. In FIG. 1, for example, matrix 14 could be entirely stripped from the label sheet before the product is sold. Alternatively, the entire sheet of facestock material could be die cut such that the entirety of the facestock material formed labels. The facestock material could either take up the same amount of facestock area shown in FIG. 1, or a significantly smaller area. Regardless of how the facestock material were constructed, shaped, and cut, a label sheet without a matrix could still employ the present invention so that a narrow strip of liner material could be easily removed in a fluid motion from a number of labels at a single time, thus exposing a minor portion of those labels so that they could thereafter be easily removed from the remaining portion of the liner.
In a still further embodiment, the label sheet could be symmetrical. For example, a label sheet could include two columns of labels. For the right hand column of labels, separation lines would be offset slightly from the right hand edge of that right hand column of labels, and for the left hand column of labels, separation lines would be offset slightly from that left hand edge of the left hand column of labels.
Additionally, it will be understood that the present invention can be used with various types and media of labels such as metallic foil, clear plastic, MOLAR®, and other well known materials. The labels could be colored or clear, and could contain pre-printed indicia such as text, two dimensional graphic or photographic images, or holographic images. The invention could be used with a variety of printing devices including but not limited to printers for use with a personal computer.
The present invention is well suited for applications in which the labels will be individually removed by hand. However, the invention is not limited to hand use. The invention could be used with automated machinery for tearing strip 26 away and thereafter placing labels 12 on a substrate. The invention could also be used in applications in which a plurality of labels are to be positioned over one or more substrate objects and applied thereto as a group in the same relative positions on which those labels are found on label assembly 10.
It will be appreciated that the term "present invention" as used herein should not be construed to mean that only a single invention having a single essential element or group of element is presented. Although the present invention has thus been described in detail with regard to the preferred embodiments and drawings thereof, it should be apparent to those skilled in the art that various adaptations and modifications of the present invention may be accomplished without departing from the scope of the invention. For example, different sizes of label assemblies could be used, either with or without matrices. The labels could be of various and sizes, and need not all be of the same shape or size. The pressure sensitive adhesive could be weak or strong. The term "standard size" will be understood to mean approximately standard size, and "8-1/2 in. x 11 in." and "A-4" and the like will be understood to mean approximately those sizes. The weakened separation lines could be formed by various known methods. The weakened separation lines are generally linear and parallel, but need not be strictly linear or strictly parallel. Accordingly, it is to be understood that the detailed description and the accompanying drawings as set forth hereinabove are not intended to limit the breadth of the present invention, which should be inferred only from the following claims and their appropriately construed legal equivalents.

Claims

A label sheet assembly (10) for feeding through a printer and constructed for easy removal of labels (12) by hand, comprising:
a release liner (16); and

a sheet of facestock material (12,14) releasably adhered to the release liner, the facestock material including at least one row or column of labels (12) formed therein and adhered to the release liner, with a cut in the facestock material separating two adjacent labels in the row or column;

wherein:
a first weakened separation line (30) is formed in the release liner (16), the first weakened separation line (30) running below the row or column of labels (12) and offset from a center of the row or column of labels toward an edge thereof; and

the facestock material is sufficiently weak between the edge of the assembly (10) and an edge of one of the labels (12) to be torn by a user and

characterized in that the weakened separation line (30) in the release liner (16) is sufficiently close to an edge of the labels (12) that is parallel to the weakened separation line (30), such that a user can tear off a strip (26) of the liner whilst simultaneously removing a strip of the facestock material adhered thereto leaving each label (12) within said row or column of labels having an exposed edge with a strip of its liner removed, thereby allowing easy removal of said labels (12) from said label sheet assembly,

wherein the release liner (16) includes a tie near the edge thereof, the tie being provided such that an end of a cut (32) of the first weakened separation line (30) does not reach the edge of the release liner (16).
The label sheet assembly of claim 1 wherein:
the facestock material (12,14) further includes a matrix (14) on at least two opposing sides of said assembly (10) and positioned over said weakened separation line (30);

a second weakened separation line (20) is formed in the matrix (14), the second weakened separation line (20) running substantially parallel to the first weakened separation line (30); and

said first (30) and second (20) weakened separation lines are sufficiently close together that a user can tear off a strip (26) of the liner and a strip (26) of the matrix in a single motion leaving each label (12) within said row or column of labels with an edge portion of its liner removed.
The label sheet assembly of claim 2, wherein said first weakened separation line (30) is defined by a plurality of cuts (32) and ties (36;38) formed in the release liner (16), and said second weakened separation line (20) is defined by a plurality of cuts (22) and ties (24) formed in the matrix (14).
The label sheet assembly of claim 2 or 3 wherein said release liner (16) has a notch (18) formed therein, the notch (18) being aligned with both the first (30) and second (20) separation lines to facilitate a user tearing off the strip (26) of the release liner (16) and the strip of matrix along the first (30) and second (20) separation lines.
The label sheet assembly of claim 4 wherein said sheet of facestock material (12,14) is smaller than the release liner (16), and the notch (18) in the liner does not extend to the facestock material sheet.
The label sheet assembly of claim 4 or 5 wherein the weakened separation line (30) in the release liner (16) has a strongest point adjacent the notch (18).
The label sheet assembly of any of claims 2 to 6 wherein said first weakened separation line (30) is offset from said second weakened separation line (20) by an offset distance of less than 2.0 mm.
The label sheet assembly of any of claims 2 to 7 wherein:
the weakened separation lines (20,30) exhibit a combined average tensile strength within the range of about 2 gm/cm to 15 gm/cm;

said first weakened separation line (30) is defined by a plurality of cuts (32) and ties (36;38) in the release liner (16); and

a ratio of cut length to overall separation line length for said first weakened separation (30) line is greater than 95%.
The label sheet assembly of any of claims 1 to 8 wherein said first weakened separation line (30) runs underneath labels (12) of said row or column of labels and less than 1 cm from an edge of said row or column of labels, such that a partially used label sheet assembly (10) may be placed on a flat surface without creating a significant adhesive bond between said labels (12) and said flat surface.
The label sheet assembly of any of claims 1 to 9 wherein said first weakened separation line (30) includes at least one tie (38) underneath each label (12) within said row or column of labels.
A label sheet assembly (10) according to claim 1 further comprising:
a second weakened separation line (20) is formed in the facestock material (12,14) in an area that is not part of the labels (12), the second weakened separation line (20) extending in a direction that is substantially parallel to the direction of the first weakened separation line (30), the second weakened separation line (20) being offset from the first weakened separation line (30) by less than 1cm.
A label sheet assembly (10) according to claim 1 or claim 11
wherein said first weakened separation line (30) runs underneath labels (12) of said row or column of labels and less than 1cm from an edge of said row or column of labels (12), such that a partially used label sheet assembly (10) may be placed on a flat surface without creating a significant adhesive bond between said labels (12) and said flat surface.