CA2055402A1 - Adhesive tape closure - Google Patents
Adhesive tape closureInfo
- Publication number
- CA2055402A1 CA2055402A1 CA002055402A CA2055402A CA2055402A1 CA 2055402 A1 CA2055402 A1 CA 2055402A1 CA 002055402 A CA002055402 A CA 002055402A CA 2055402 A CA2055402 A CA 2055402A CA 2055402 A1 CA2055402 A1 CA 2055402A1
- Authority
- CA
- Canada
- Prior art keywords
- adhesive
- adhesive tape
- backing
- cover sheet
- coating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
- B65D5/02—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body
- B65D5/0236—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper by folding or erecting a single blank to form a tubular body with or without subsequent folding operations, or the addition of separate elements, to close the ends of the body with end closures formed by inward folding of flaps and securing them by adhesive tapes, labels or the like; for decoration purposes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/20—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself
- C09J2301/204—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive itself the adhesive coating being discontinuous
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Adhesive Tapes (AREA)
- Package Closures (AREA)
- Laminated Bodies (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
An adhesive tape closure for sealing or packaging containers is described, including a backing having an adhesive coating on one side thereof, and a release coating on the other side thereof. The adhesive tape closure has no adhesive in intermittent limited portions thereof 80 that adhesive sections of the adhesive coating on the backing are separated by non-adhesive sections on both sides thereof.
Alternatively, the non-adhesive sections may be free of adhesive or the surface of the pressure-sensitive adhesive coating is inactivated in said non-adhesive sections, or the activatable adhesive is not activated in the said non-adhesive sections.
An adhesive tape closure for sealing or packaging containers is described, including a backing having an adhesive coating on one side thereof, and a release coating on the other side thereof. The adhesive tape closure has no adhesive in intermittent limited portions thereof 80 that adhesive sections of the adhesive coating on the backing are separated by non-adhesive sections on both sides thereof.
Alternatively, the non-adhesive sections may be free of adhesive or the surface of the pressure-sensitive adhesive coating is inactivated in said non-adhesive sections, or the activatable adhesive is not activated in the said non-adhesive sections.
Description
20~5~
PATENT
DOCKET NO. 46818CAN8A
ADHESIVE TAPE CLOS~RE
TECHNICAL FIELD
The invention related to an adhesive tape closure for sealing containers.
BACKGROUND ART
Adhesive tapes for sealing containers which comprise a backing in tape form and an adhesive layer on one side thereof have been known.
Normally, adheæive tapes of this kind are affixed over the joint which is formed when the movable panels or flaps cf a container~such as a carton are moved down to close it.
When a container so closed is to be opened, the previously affixed adhesive tape has to be cut by means of a suitable instrument such as a razor blade, a knife or a pair of scissors along the joint between the carton's panels. This procedure is disadvantageous in that an instrument is required for opening the carton and in that the adhesive tape having been cut apart remains on the carton after the latter has been opened, rendering it unserviceable for re-use.
For these reasons, attempts have been made to develop adhesive tapes for sealing and opening cartons which are adapted to be stripped completely from the carton being opened. To this end, the two ends of the adhesive tape used for sealing the carton are rendered non-adhesive by being folded over on themselves for a limited length so that free tabs are formed at the ends of the affixed tape which a worker may grasp by his/her fingers so as to withdraw the adhesive tape as the carton is being opened.
Adhesive tapes of this kind are described in DE-OS 20 11 2~55~02 360, British Patent Application 21203,720, PCT W0 88/03897, U.S. Patent 4,227,995 and EP-A 0 250 353.
A shortcoming of these prior adhesive tapes is that the free stripping tabs inhibit the shifting and stacking of closed cartons placed side by side or on top of each other. In addition, they may be damaged during shipment 80 that the carton has to be opened later on, as in the past, by means of a suitable cutting instrument.
U.S. Patent 4,647,485 discloses an adhesive tape which has parallel score lines or perforations extending in parallel with the center line and terminating at stripping tabs at both ends of the adhesive tape. In the process of opening a carton closed by means of an adhesive tape of this kind, the danger of the stripping tab being ripped away is reduced, and the narrow strip of adhesive tape between the two score lines is easily removed for opening the carton.
A shortcoming of the adhesive tapes disclosed in the '485 patent is that their durability is limited since a considerable potential exists of the carton opsning unintentionally along the score lines or perforations while the closed carton is handled and transported.
It is known from US Patent 4 741 935 to provide an adhesive tape closure having first and second lower tape strips each including an adhesive coating. The first and second lower tape strips are partially overlapping along adjacent edges. An upper tape strip is releasably adhered to the first and second lower tape strips and is at least coextensive with the overlapped portions of the lower tape strips. Each of the lower tape strips is adhesively secured to one of two adjacent container parts with the overlapped portion generally positioned at the juncture of the container parts.
2~5~02 To disconnect the container parts the upper tape strip is delaminated by grasping a tab projecting from an edge of the upper tape strip. The overlapped portion precludes delamination of the lower tape strips from the container parts as the upper tape strip is removed. The lower tape strip6 are then manually separated from each other at the overlapped portion to disconnect the container parts.
Further, all prior adhesive tape closures are disadvantageous in that they are suited solely for sealing a single carton so that, even if adapted to be removed completely after the carton has been opened, the carton once used cannot be used anew because of the other inscriptions applied thereto (consignor, consignee, etc.) and has to be discarded. In the light of the great number of containers - particularly cartons - used for packaging a wide variety of products, this shortcoming aggravates the problem of an environmentally acceptable disposal of packaging materials.
On this basis, the object underlying the invention is to provide an adhesive tape closure which not only is suited for reliably sealing and packaging containers, but as6umes additional functions and, in particular, facilitates the process of opening the container.
~ISCLOSURE OF INVENTION
In accordance with the invention, the adhesive tape closure has no adhesive in intermittent limited portions thereof so that adhesive sections of the adhesive coating on the backing are joined by non-adhesive sections on both sides thereof.
According to a preferred embodiment of the invention, nonadhesive sections are either free of adhesive, the surface of a pressure-sensitive adhesive coating is inactivated (e.g. rendered non-adhesive) in said non-adhesive sections, or an activatable (e.g. heat - 2 0 ~ 2 activated) adhesive is not activated in the said non-adhesive sections.
According to another preferred embodiment, the 5 adhesive effect of the adhesive coating sections is inactivated or destroyed in the total area or in de~ired portions of said limited sections by a cover sheet of paper or a plastic material, a print of non-adhesive lacquer, a polychrome print, or a neutralizing ink.
According to another preferred embodiment, the adhesive coating has been inactivated by a print of an adhesion-destroying coating.
According to another preferred embodiment, the backing i8 paper, a plastics material or a combination thereof.
According to another preferred embodiment, the backing is light transmissive (i.e., translucent or transparent).
According to another preferred embodiment, the backing is polyester, bi- or monoaxially oriented or nonoriented polypropylene, PVC, polyethylene-coated paper or polyethylene.
According to another preferred embodiment, the cover sheet has on the side facing the adhesive a low adhesion backsizing coating.
According to another preferred embodiment, the cover sheet sectionally inactivating said adhesive coating has the same width as adhesive tape a smaller width than adhesive tape or a greater width than adhesive tape.
According to another preferred embodiment, the cover sheet is visible through transparent backing and i8 circular, square or rectangular in shape.
20~5~02 According to another preferred embodiment, the cover sheet and the backing thereon are perforated or partly incised on one side in a direction transverse to the longitudinal direction of the adhesive tape.
According to another preferred embodiment, the cover sheet is narrower along one side than the subjacent backing to cause a pocket to be formed which has an opening transverse of the longitudinal direction of the tape for the introduction of a sheet bearing infcrmation in between the adhesive tape and the substrate to which it is adhered.
According to another preferred embodiment, the cover sheet is narrower than backing thereon along both sides and in that said backing has therein a slot extending over the width of cover sheet to cause a pocket to be formed which has an opening in the longitudinal direction of the tape for introducing information in between the adhesive tape and the substrate to which it is adhered.
According to another preferred embodiment, the cover sheet i8 provided with an indicia imprint.
Below some of the preferred embodiments presented above are explained further.
The backing used for making the adhesive tape preferably i8 light transmissive (i.e., translucent or transparent). It may be paper or a light transmissive (i.e., translucent or transparent) plastics material. The coat of an adhesive material applied to the substrate preferably is self-adhesive or pressure-sensitive.
The adhesive coating may be sectionally inactivated, i.e., rendered non-adhesive, by coating it with printing ink or by placing a sheet of paper, a polymer film, a prefabricated label or an address label in a desired size thereon. Preferably, the inactivating sheet placed sectionally on the adhesive coating has the same width as 2~5~0~
the adhesive tape, but may be narrower or broader than the adhesive tape.
The covering sheet, which is visible through the ligh~
transmissive (i.e., translucent or transparent) backinq, preferably i6 printed on its side facing the adhesive coating; also, it may be any desired shape such as circular, square or rectangular in shape.
The print on the sheet which is to be visible through the light transmissive (i.e., translucent or transparent) backing of the adhesive tape may be a promotional text or any kind of information as may relate to the manufacturer, the contents of the container, the consignor, the lS consignee's address, etc.
As a consequence, all information previously applied to the container's or carton's outer surface at locations outside the adhesive tapes can now be omitted so that, after the inventive adhesive tape has been removed, the resultant container is totally neutral and suited for reuse or easy recycling without tape residues. This enables considerable savings to be realized in terms of carton raw materials; in addition, the cost of producing containers, and particularly cartons, will be greatly reduced.
Further, since the containers or cartons are reusable, a substantial burden is lifted from the environment, and the problems raised by an environmentally acceptable disposal of such containers or cartons cease to exist.
For opening a container sealed with the inventiYe adhesive tape closure, it is sufficient to apply to the bottom surface of the adhesive tape a non-adhesive section such as a sheet which renders the adhesive tape in that area non-adhesive so that it may be lifted easily from the container it seals, and to sever it at right angles to the extent of the adhesive tape by means of a suitable instrument (razor blade, knife or scissors). Since the adhesive tape previously applied to the carton is 20~4 ~X
internally stressed, the two sections of the covering sheet, now stress-relieved, will move slightly upwards so that they form stripping tabs a worker can easily manually grasp to completely strip the adhesive from the container.
According to a preferred embodiment of the invention, it is possible to provide both the covering sheet and the transparent backing with perforations or partial incisions at right angles to the length of the tape so that the container may be opened without an instrument simply by severing the tape at the perforations or a partly incised position and then completely stripping the adhesive tape away.
The cover sheet sectionally inactivating the adhesive coating of the inventive adhesive tape may be provided on its side facing the adhesive coating with any indicia, which will be visible to an observer through the transparent backing. The overlying backing - preferably a polymer film such as biaxially oriented polypropylene -protects the information against external damage and moisture 80 that the consignor or consignee, for example, will be easily legible at any time even if the container sealed by means of the inventive adhesive tape is exposed during transport to moisture (e.g. rain) or substantial mechanical strain (e.g. by stacked cartons shifting relative to each other).
Further, the cover sheet may be provided with promotional information in attractive colors so that the container sealed by means of the inventive adhesive tape closure constitutes an attractive advertising media.
Since non-adhesive sections may be placed at suitable distances along the inventive adhesive tape closure by affixing cover sheets to it in desired positions, yet only one such sheet must be cut apart or torn open for opening the container, the information on the remaining sections or cover sheets may be retrieved undamaged - e.g. a label 2055~2 showing the address of the consignor or the consignee; the label may easily be stripped from the backing since the side of the cover sheet facing the adhesive coating is preferably provided with an adhesive-repellent surface.
Moreover, the inventive adhesive tape closure constitutes an effective closure of the container or carton it is used to seal since it can be detected at any time whether the has been opened or not before it arrives at its destination. Should the container have been opened inadvertently or tampered with before its arrival, this condition may be recognized by the fact that the cover sheet of paper is cut or torn apart even if the carton has been resealed by sticking a length of adhesive tape across the cut.
According to another preferred embodiment of the invention, at least one cover sheet affixed to the underside of the adhesive tape may be somewhat narrower on one side that the superjacent backing of the adhesive tape so that the adhesive tape is affixed continuously along one edge thereof to the carton it is used to seal. This causes a pocket to be formed which has an opening perpendicular to the extent of the adhesive tape and with a depth somewhat smaller than the width of the adhesive tape and a width corresponding to that of the cover sheet. This opening may be used to introduce into the pocket printed information such as operating instructions, shipping papers, advertising material or the like, which that receiver will be able to retrieve from the pocket easily and in an undamaged condition.
It is equally possible to create a pocket extending in the longitudinal direction of the adhesive tape by using a cover sheet which is narrower on both sides than the superjacent backing of the adhesive tape so that the latter is affixed in place on the container continuously along both edges. By providing a slot a few millimeters wide in a direction transverse to the longitudinal direction of the 2~4~2 tape (preferably by punching it into the tape) and having a length which may correspond to the width of the cover sheet thereunder, a pocket is formed in the longitudinal direction of the tape between the cover sheet and the surface of the container thereunder, such pocket also being suited to receive printed information such as operating instructions, shipping papers, advertising material and the like. The inventive adhesive tape closure may be manufactured by using conventional means. The cover sheet to be applied intermittently to the underside of the adhesive tape may be produced separately and provided with any desired indicia. Suitable apparatus may be used to apply it in the desired position on the adhesive tape durinq the fabrication thereof to be coiled in roll form together therewith and offered for sale in this form. The on the cover sheets may be designed as desired by the final user.
~RIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention will now be explained in greater detail under reference to the attached drawings.
Fig. 1 shows a carton to which the adhesive tape closure of the present invention has been applied;
Figs. 2, 3 and 4 sequentially show the removal of an adhesive tape closure of the present invention;
Fig. 5 shows an embodiment of the adhesive tape closure of the present invention including indicia;
Fig. 6 shows an embodiment of the adhesive tape closure of the present invention including a pocket for receipt of a sheet member;
2~5~02 Figs. 7 and 8 show alternative embodiments of pockets formed in the adhesive tape closure of the present invention; and Figs. 9, 10 and 11 show additional alternate of the adhesive tape closure of the present invention.
DETAI~ED DESCRIPTION
Fig. 1 shows a container, such as a regular slotted carton (RSC) sealed with an adhesive tape closure 1 according to the present invention comprising a light transmissive (i.e., translucent or transparent) backing 2 and a layer of a pressure sensitive adhesive applied to the I5 underside of the backing and provided sectionally with cover sheets 3 which render the respective covered or inactivated portions of the adhesive coating non-tacky.
The cover sheets 3 are joined at both ends by adhesive portions 4 of the pressure sensitive adhesive coating. The non-tackified sections 3 of the adhesive tape may preferably be totally free of adhesive; alternatively, the surface of the adhesive layer may be inactivated such as by a coating applied to the adhesive or a non-pressure aensitive adhesive ~i.e., heat activated) may be nonactive.
Thus, adhesive tape closure 1, which is provided in roll form, has alternating adhesive and non-adhesive sec-tions. It is covered with a release coating on its reverse ; side.
Figs. 2, 3 and 4 show uses of the inventive adhesive tape closure, which may be torn apart or cut apart by means of a suitable cutting instrument (Fig. 3) along the line of perforations 9 transverse to the longitudinal direction of the tape. The free portions so formed of the cover sheet serve as tabs for stripping the adhesive tape away (Fig.
4).
-` 2 0 ~
Fig. 5 shows a length of the inventive adhesive tape closure wherein indicia on cover sheet 3 i8 visible through backing 2.
Fig. 6 shows another preferred embodiment of the inventive adhesive tape closure in which cover sheet 3 is narrower along one longitudinal side than adhesive tape thereby forming a pocket 5 closed on three sides and having an opening 6 at right angles to the longitudinal direction of the adhesive tape for the introduction of information sheets or the like between the cover sheet and the sub;acent carton surface.
Figs. 7 and 8 show another preferred further development of the inventive adhesive tape closure in which cover sheet 3 is narrower along both longitudinal sides than adhesive tape 1 and a slot 7 longer than cover sheet 3 is wide is formed transverse of the longitudinal direction of the adhesive tape in backing 2 thereof to form a pocket 8 which i8 closed along three sides and open in the longitudinal direction of the tape at slot 7 for receiving information sheets between the cover sheet and the subjacent carton surface. The information material introduced through slot 7 may have indicia printed on its portion protruding from slot 7 to display the nature of the information therein.
Figs. 9 and 10 show another preferred development of the inventive adhesive tape closure. In this case, cover sheet 3a is circular and should have a diameter at least equal to the width of the adhesive tape so that the stripping tab is accessible and may be actuated.
Fig. 11 shows another preferred development of the inventive adhesive tape closure used for sealing circular containers having ends such as cans or the like.
Can-shaped containers of this kind frequently are sealed by means of a length of adhesive tape which require the provision of a stripping tab - an objective difficult to 2 ~
achieve. In this embodiment of the inventive adhesive tape closure a cover sheet 3, e.g. of paper or flexible plastic, is provided sectionally along adhesive tape 1 so as to establish several positions along the periphery of the can-shaped container where a tape stripping tab i8 available. Approximately centrally disposed along the cover sheet 3 there is provided transversely of the longitudinal direction of the adhesive tape a line of perforations or an incision 10, the latter on one or two sides of the adhesive tape in the area of the non-adhesive section such as cover sheet 3. Thus, it is possible to raise the prepared stripping tab in these positions and to strip the adhesive tape, if needed. The adhesive tape closure of the present invention offers the following advantages over the state of the art:
1) It enables a mechanically easy and complete removal of the tape from the container it seals -particularly a carton - so that the container or carton may be recycled and/or reused.
2) It has an attractive appearance and enables easily visible information to be applied to the container. for identifying and distinguishing its contents; the attractive appearance of the inventive tape closure distinguishes it advantageously from prior printed adhesive tape closures.
PATENT
DOCKET NO. 46818CAN8A
ADHESIVE TAPE CLOS~RE
TECHNICAL FIELD
The invention related to an adhesive tape closure for sealing containers.
BACKGROUND ART
Adhesive tapes for sealing containers which comprise a backing in tape form and an adhesive layer on one side thereof have been known.
Normally, adheæive tapes of this kind are affixed over the joint which is formed when the movable panels or flaps cf a container~such as a carton are moved down to close it.
When a container so closed is to be opened, the previously affixed adhesive tape has to be cut by means of a suitable instrument such as a razor blade, a knife or a pair of scissors along the joint between the carton's panels. This procedure is disadvantageous in that an instrument is required for opening the carton and in that the adhesive tape having been cut apart remains on the carton after the latter has been opened, rendering it unserviceable for re-use.
For these reasons, attempts have been made to develop adhesive tapes for sealing and opening cartons which are adapted to be stripped completely from the carton being opened. To this end, the two ends of the adhesive tape used for sealing the carton are rendered non-adhesive by being folded over on themselves for a limited length so that free tabs are formed at the ends of the affixed tape which a worker may grasp by his/her fingers so as to withdraw the adhesive tape as the carton is being opened.
Adhesive tapes of this kind are described in DE-OS 20 11 2~55~02 360, British Patent Application 21203,720, PCT W0 88/03897, U.S. Patent 4,227,995 and EP-A 0 250 353.
A shortcoming of these prior adhesive tapes is that the free stripping tabs inhibit the shifting and stacking of closed cartons placed side by side or on top of each other. In addition, they may be damaged during shipment 80 that the carton has to be opened later on, as in the past, by means of a suitable cutting instrument.
U.S. Patent 4,647,485 discloses an adhesive tape which has parallel score lines or perforations extending in parallel with the center line and terminating at stripping tabs at both ends of the adhesive tape. In the process of opening a carton closed by means of an adhesive tape of this kind, the danger of the stripping tab being ripped away is reduced, and the narrow strip of adhesive tape between the two score lines is easily removed for opening the carton.
A shortcoming of the adhesive tapes disclosed in the '485 patent is that their durability is limited since a considerable potential exists of the carton opsning unintentionally along the score lines or perforations while the closed carton is handled and transported.
It is known from US Patent 4 741 935 to provide an adhesive tape closure having first and second lower tape strips each including an adhesive coating. The first and second lower tape strips are partially overlapping along adjacent edges. An upper tape strip is releasably adhered to the first and second lower tape strips and is at least coextensive with the overlapped portions of the lower tape strips. Each of the lower tape strips is adhesively secured to one of two adjacent container parts with the overlapped portion generally positioned at the juncture of the container parts.
2~5~02 To disconnect the container parts the upper tape strip is delaminated by grasping a tab projecting from an edge of the upper tape strip. The overlapped portion precludes delamination of the lower tape strips from the container parts as the upper tape strip is removed. The lower tape strip6 are then manually separated from each other at the overlapped portion to disconnect the container parts.
Further, all prior adhesive tape closures are disadvantageous in that they are suited solely for sealing a single carton so that, even if adapted to be removed completely after the carton has been opened, the carton once used cannot be used anew because of the other inscriptions applied thereto (consignor, consignee, etc.) and has to be discarded. In the light of the great number of containers - particularly cartons - used for packaging a wide variety of products, this shortcoming aggravates the problem of an environmentally acceptable disposal of packaging materials.
On this basis, the object underlying the invention is to provide an adhesive tape closure which not only is suited for reliably sealing and packaging containers, but as6umes additional functions and, in particular, facilitates the process of opening the container.
~ISCLOSURE OF INVENTION
In accordance with the invention, the adhesive tape closure has no adhesive in intermittent limited portions thereof so that adhesive sections of the adhesive coating on the backing are joined by non-adhesive sections on both sides thereof.
According to a preferred embodiment of the invention, nonadhesive sections are either free of adhesive, the surface of a pressure-sensitive adhesive coating is inactivated (e.g. rendered non-adhesive) in said non-adhesive sections, or an activatable (e.g. heat - 2 0 ~ 2 activated) adhesive is not activated in the said non-adhesive sections.
According to another preferred embodiment, the 5 adhesive effect of the adhesive coating sections is inactivated or destroyed in the total area or in de~ired portions of said limited sections by a cover sheet of paper or a plastic material, a print of non-adhesive lacquer, a polychrome print, or a neutralizing ink.
According to another preferred embodiment, the adhesive coating has been inactivated by a print of an adhesion-destroying coating.
According to another preferred embodiment, the backing i8 paper, a plastics material or a combination thereof.
According to another preferred embodiment, the backing is light transmissive (i.e., translucent or transparent).
According to another preferred embodiment, the backing is polyester, bi- or monoaxially oriented or nonoriented polypropylene, PVC, polyethylene-coated paper or polyethylene.
According to another preferred embodiment, the cover sheet has on the side facing the adhesive a low adhesion backsizing coating.
According to another preferred embodiment, the cover sheet sectionally inactivating said adhesive coating has the same width as adhesive tape a smaller width than adhesive tape or a greater width than adhesive tape.
According to another preferred embodiment, the cover sheet is visible through transparent backing and i8 circular, square or rectangular in shape.
20~5~02 According to another preferred embodiment, the cover sheet and the backing thereon are perforated or partly incised on one side in a direction transverse to the longitudinal direction of the adhesive tape.
According to another preferred embodiment, the cover sheet is narrower along one side than the subjacent backing to cause a pocket to be formed which has an opening transverse of the longitudinal direction of the tape for the introduction of a sheet bearing infcrmation in between the adhesive tape and the substrate to which it is adhered.
According to another preferred embodiment, the cover sheet is narrower than backing thereon along both sides and in that said backing has therein a slot extending over the width of cover sheet to cause a pocket to be formed which has an opening in the longitudinal direction of the tape for introducing information in between the adhesive tape and the substrate to which it is adhered.
According to another preferred embodiment, the cover sheet i8 provided with an indicia imprint.
Below some of the preferred embodiments presented above are explained further.
The backing used for making the adhesive tape preferably i8 light transmissive (i.e., translucent or transparent). It may be paper or a light transmissive (i.e., translucent or transparent) plastics material. The coat of an adhesive material applied to the substrate preferably is self-adhesive or pressure-sensitive.
The adhesive coating may be sectionally inactivated, i.e., rendered non-adhesive, by coating it with printing ink or by placing a sheet of paper, a polymer film, a prefabricated label or an address label in a desired size thereon. Preferably, the inactivating sheet placed sectionally on the adhesive coating has the same width as 2~5~0~
the adhesive tape, but may be narrower or broader than the adhesive tape.
The covering sheet, which is visible through the ligh~
transmissive (i.e., translucent or transparent) backinq, preferably i6 printed on its side facing the adhesive coating; also, it may be any desired shape such as circular, square or rectangular in shape.
The print on the sheet which is to be visible through the light transmissive (i.e., translucent or transparent) backing of the adhesive tape may be a promotional text or any kind of information as may relate to the manufacturer, the contents of the container, the consignor, the lS consignee's address, etc.
As a consequence, all information previously applied to the container's or carton's outer surface at locations outside the adhesive tapes can now be omitted so that, after the inventive adhesive tape has been removed, the resultant container is totally neutral and suited for reuse or easy recycling without tape residues. This enables considerable savings to be realized in terms of carton raw materials; in addition, the cost of producing containers, and particularly cartons, will be greatly reduced.
Further, since the containers or cartons are reusable, a substantial burden is lifted from the environment, and the problems raised by an environmentally acceptable disposal of such containers or cartons cease to exist.
For opening a container sealed with the inventiYe adhesive tape closure, it is sufficient to apply to the bottom surface of the adhesive tape a non-adhesive section such as a sheet which renders the adhesive tape in that area non-adhesive so that it may be lifted easily from the container it seals, and to sever it at right angles to the extent of the adhesive tape by means of a suitable instrument (razor blade, knife or scissors). Since the adhesive tape previously applied to the carton is 20~4 ~X
internally stressed, the two sections of the covering sheet, now stress-relieved, will move slightly upwards so that they form stripping tabs a worker can easily manually grasp to completely strip the adhesive from the container.
According to a preferred embodiment of the invention, it is possible to provide both the covering sheet and the transparent backing with perforations or partial incisions at right angles to the length of the tape so that the container may be opened without an instrument simply by severing the tape at the perforations or a partly incised position and then completely stripping the adhesive tape away.
The cover sheet sectionally inactivating the adhesive coating of the inventive adhesive tape may be provided on its side facing the adhesive coating with any indicia, which will be visible to an observer through the transparent backing. The overlying backing - preferably a polymer film such as biaxially oriented polypropylene -protects the information against external damage and moisture 80 that the consignor or consignee, for example, will be easily legible at any time even if the container sealed by means of the inventive adhesive tape is exposed during transport to moisture (e.g. rain) or substantial mechanical strain (e.g. by stacked cartons shifting relative to each other).
Further, the cover sheet may be provided with promotional information in attractive colors so that the container sealed by means of the inventive adhesive tape closure constitutes an attractive advertising media.
Since non-adhesive sections may be placed at suitable distances along the inventive adhesive tape closure by affixing cover sheets to it in desired positions, yet only one such sheet must be cut apart or torn open for opening the container, the information on the remaining sections or cover sheets may be retrieved undamaged - e.g. a label 2055~2 showing the address of the consignor or the consignee; the label may easily be stripped from the backing since the side of the cover sheet facing the adhesive coating is preferably provided with an adhesive-repellent surface.
Moreover, the inventive adhesive tape closure constitutes an effective closure of the container or carton it is used to seal since it can be detected at any time whether the has been opened or not before it arrives at its destination. Should the container have been opened inadvertently or tampered with before its arrival, this condition may be recognized by the fact that the cover sheet of paper is cut or torn apart even if the carton has been resealed by sticking a length of adhesive tape across the cut.
According to another preferred embodiment of the invention, at least one cover sheet affixed to the underside of the adhesive tape may be somewhat narrower on one side that the superjacent backing of the adhesive tape so that the adhesive tape is affixed continuously along one edge thereof to the carton it is used to seal. This causes a pocket to be formed which has an opening perpendicular to the extent of the adhesive tape and with a depth somewhat smaller than the width of the adhesive tape and a width corresponding to that of the cover sheet. This opening may be used to introduce into the pocket printed information such as operating instructions, shipping papers, advertising material or the like, which that receiver will be able to retrieve from the pocket easily and in an undamaged condition.
It is equally possible to create a pocket extending in the longitudinal direction of the adhesive tape by using a cover sheet which is narrower on both sides than the superjacent backing of the adhesive tape so that the latter is affixed in place on the container continuously along both edges. By providing a slot a few millimeters wide in a direction transverse to the longitudinal direction of the 2~4~2 tape (preferably by punching it into the tape) and having a length which may correspond to the width of the cover sheet thereunder, a pocket is formed in the longitudinal direction of the tape between the cover sheet and the surface of the container thereunder, such pocket also being suited to receive printed information such as operating instructions, shipping papers, advertising material and the like. The inventive adhesive tape closure may be manufactured by using conventional means. The cover sheet to be applied intermittently to the underside of the adhesive tape may be produced separately and provided with any desired indicia. Suitable apparatus may be used to apply it in the desired position on the adhesive tape durinq the fabrication thereof to be coiled in roll form together therewith and offered for sale in this form. The on the cover sheets may be designed as desired by the final user.
~RIEF DESCRIPTION OF THE DRAWINGS
Preferred embodiments of the invention will now be explained in greater detail under reference to the attached drawings.
Fig. 1 shows a carton to which the adhesive tape closure of the present invention has been applied;
Figs. 2, 3 and 4 sequentially show the removal of an adhesive tape closure of the present invention;
Fig. 5 shows an embodiment of the adhesive tape closure of the present invention including indicia;
Fig. 6 shows an embodiment of the adhesive tape closure of the present invention including a pocket for receipt of a sheet member;
2~5~02 Figs. 7 and 8 show alternative embodiments of pockets formed in the adhesive tape closure of the present invention; and Figs. 9, 10 and 11 show additional alternate of the adhesive tape closure of the present invention.
DETAI~ED DESCRIPTION
Fig. 1 shows a container, such as a regular slotted carton (RSC) sealed with an adhesive tape closure 1 according to the present invention comprising a light transmissive (i.e., translucent or transparent) backing 2 and a layer of a pressure sensitive adhesive applied to the I5 underside of the backing and provided sectionally with cover sheets 3 which render the respective covered or inactivated portions of the adhesive coating non-tacky.
The cover sheets 3 are joined at both ends by adhesive portions 4 of the pressure sensitive adhesive coating. The non-tackified sections 3 of the adhesive tape may preferably be totally free of adhesive; alternatively, the surface of the adhesive layer may be inactivated such as by a coating applied to the adhesive or a non-pressure aensitive adhesive ~i.e., heat activated) may be nonactive.
Thus, adhesive tape closure 1, which is provided in roll form, has alternating adhesive and non-adhesive sec-tions. It is covered with a release coating on its reverse ; side.
Figs. 2, 3 and 4 show uses of the inventive adhesive tape closure, which may be torn apart or cut apart by means of a suitable cutting instrument (Fig. 3) along the line of perforations 9 transverse to the longitudinal direction of the tape. The free portions so formed of the cover sheet serve as tabs for stripping the adhesive tape away (Fig.
4).
-` 2 0 ~
Fig. 5 shows a length of the inventive adhesive tape closure wherein indicia on cover sheet 3 i8 visible through backing 2.
Fig. 6 shows another preferred embodiment of the inventive adhesive tape closure in which cover sheet 3 is narrower along one longitudinal side than adhesive tape thereby forming a pocket 5 closed on three sides and having an opening 6 at right angles to the longitudinal direction of the adhesive tape for the introduction of information sheets or the like between the cover sheet and the sub;acent carton surface.
Figs. 7 and 8 show another preferred further development of the inventive adhesive tape closure in which cover sheet 3 is narrower along both longitudinal sides than adhesive tape 1 and a slot 7 longer than cover sheet 3 is wide is formed transverse of the longitudinal direction of the adhesive tape in backing 2 thereof to form a pocket 8 which i8 closed along three sides and open in the longitudinal direction of the tape at slot 7 for receiving information sheets between the cover sheet and the subjacent carton surface. The information material introduced through slot 7 may have indicia printed on its portion protruding from slot 7 to display the nature of the information therein.
Figs. 9 and 10 show another preferred development of the inventive adhesive tape closure. In this case, cover sheet 3a is circular and should have a diameter at least equal to the width of the adhesive tape so that the stripping tab is accessible and may be actuated.
Fig. 11 shows another preferred development of the inventive adhesive tape closure used for sealing circular containers having ends such as cans or the like.
Can-shaped containers of this kind frequently are sealed by means of a length of adhesive tape which require the provision of a stripping tab - an objective difficult to 2 ~
achieve. In this embodiment of the inventive adhesive tape closure a cover sheet 3, e.g. of paper or flexible plastic, is provided sectionally along adhesive tape 1 so as to establish several positions along the periphery of the can-shaped container where a tape stripping tab i8 available. Approximately centrally disposed along the cover sheet 3 there is provided transversely of the longitudinal direction of the adhesive tape a line of perforations or an incision 10, the latter on one or two sides of the adhesive tape in the area of the non-adhesive section such as cover sheet 3. Thus, it is possible to raise the prepared stripping tab in these positions and to strip the adhesive tape, if needed. The adhesive tape closure of the present invention offers the following advantages over the state of the art:
1) It enables a mechanically easy and complete removal of the tape from the container it seals -particularly a carton - so that the container or carton may be recycled and/or reused.
2) It has an attractive appearance and enables easily visible information to be applied to the container. for identifying and distinguishing its contents; the attractive appearance of the inventive tape closure distinguishes it advantageously from prior printed adhesive tape closures.
3) A container - particularly a carton - sealed by the inventive adhesive tape closure has no exposed stripping tabs on the surface thereof which might be damaged during handling or transport or interfere with the shifting or stacking of the containers, particularly cartons.
- 2~
- 2~
4) The inventive adhesive tape closure constitutes a valuable and attractive advertising media which may be used by both the consignor and the consignee.
5) The inventive adhesive tape closure is superior to prior printed adhesive tapes in that it may be produced economically on existing eguipment without requiring a costly additional printing treatment. The cover sheets bearing the indicia may be produced separately and applied to the adhesive coating of the adhesive tape closure by mechanical means or by hand without expensive retrofitting or additional investments being needed.
6) The process of making conventional tapes does not have to be converted so that no additional investments accrue.
7) Finally, the inventive adhesive tape closure makes it possible to recognize immediately whether the container is seals - particularly a carton - has been opened intentionally or inadvertently and resealed before reaching the consignee: the served or torn paper of the cover sheet is easily detected and cannot be restored to its former condition.
The following -examples explain further the structure of adhesive tape closure according to the present invention.
Exam~le 1 The backing (2) is a 50 mm wide biaxially oriented polypropylene film having a thickness of 28 microns, which is coated with a pressure sensitive adhesive at 18 grams per square meter. The adhesive is composed of 2 0 ~
46% per weight o~ natural rubber, 41.5% per weight of a hydrocarbon resin, 0.3% per weight antioxidant ~Phenolic type) 12.2% per weight Tio2 The cover sheet (3) is a paper mask 50 mm long and 50 mm wide. Backing (2) and cover ~heet (3) are perforated.
Fig. 2 shows the actual design of the adhesive tape closure of this Example. The release coating of the adhesive tape is polyvinyloctadecylcarbammate.
Example 2 The backing (2) is a 50 mm wide non-plasticized-polyvinyl-chloride (UPVC) film having a thickness of 34 micron6 which is coated with a pressure sensitive adhesive at 20 grams per square meter. The adhesive is composed of:
52.1% per weight natural rubber 47.6% per weight of a hydrocarbon resin 0.3% per weight antioxidant (Phenolic type).
The cover sheet (3) is a paper mask 80 mm long and 60 mm wide, and is on one side 10 mm broader than the backing (2).
The release coating of the adhesive tape is polyvinyloctadecylcarbammate.
ExamDle 3 The backing (2) is a 80 mm wide polyester film having a thickness of 50 microns which is coated with a pressure sensitive adhesive at 32 grams per square meter. The adhesive is composed of:
49.5% by weight synthetic rubber 49.5% by weight hydrocarbon resin 1.0% by weight antioxidant (Phenolic type) 20~S~
The cover sheet ~3) is a circular paper mask having a diameter of 80 mm. Backing (2) and cover sheet ~3) are perforated. The cover sheet is provided with indicia, as shown in Fig. 10.
The release coating of the adhesive tape is an urethane low adhesion backsize.
The invention has been explained above under reference to specific preferred embodiments; however, it will be obvious to the person skilled in the art that it is not limited to them. Rather, it may be altered and modified in various ways without leaving the scope of the pre3ent invention.
The following -examples explain further the structure of adhesive tape closure according to the present invention.
Exam~le 1 The backing (2) is a 50 mm wide biaxially oriented polypropylene film having a thickness of 28 microns, which is coated with a pressure sensitive adhesive at 18 grams per square meter. The adhesive is composed of 2 0 ~
46% per weight o~ natural rubber, 41.5% per weight of a hydrocarbon resin, 0.3% per weight antioxidant ~Phenolic type) 12.2% per weight Tio2 The cover sheet (3) is a paper mask 50 mm long and 50 mm wide. Backing (2) and cover ~heet (3) are perforated.
Fig. 2 shows the actual design of the adhesive tape closure of this Example. The release coating of the adhesive tape is polyvinyloctadecylcarbammate.
Example 2 The backing (2) is a 50 mm wide non-plasticized-polyvinyl-chloride (UPVC) film having a thickness of 34 micron6 which is coated with a pressure sensitive adhesive at 20 grams per square meter. The adhesive is composed of:
52.1% per weight natural rubber 47.6% per weight of a hydrocarbon resin 0.3% per weight antioxidant (Phenolic type).
The cover sheet (3) is a paper mask 80 mm long and 60 mm wide, and is on one side 10 mm broader than the backing (2).
The release coating of the adhesive tape is polyvinyloctadecylcarbammate.
ExamDle 3 The backing (2) is a 80 mm wide polyester film having a thickness of 50 microns which is coated with a pressure sensitive adhesive at 32 grams per square meter. The adhesive is composed of:
49.5% by weight synthetic rubber 49.5% by weight hydrocarbon resin 1.0% by weight antioxidant (Phenolic type) 20~S~
The cover sheet ~3) is a circular paper mask having a diameter of 80 mm. Backing (2) and cover sheet ~3) are perforated. The cover sheet is provided with indicia, as shown in Fig. 10.
The release coating of the adhesive tape is an urethane low adhesion backsize.
The invention has been explained above under reference to specific preferred embodiments; however, it will be obvious to the person skilled in the art that it is not limited to them. Rather, it may be altered and modified in various ways without leaving the scope of the pre3ent invention.
Claims (11)
1. An adhesive tape closure for sealing containers, comprising a backing in tape form having an adhesive coating on one side thereof, and a release coating on the other side thereof wherein the adhesive tape has no adhesive power in intermittent limited portions thereof so that adhesive sections of the adhesive coating on the backing are joined by non-adhesive sections on either side thereof.
2. An adhesive tape closure as in claim 1, wherein said non-adhesive sections are free of adhesive, the surface of the adhesive coating is inactivated in said non-adhesive sections.
3. An adhesive tape closure as in claim 2, wherein the adhesive effect of the adhesive coating sections is inactivated in desired portions of said limited sections by a cover sheet.
4. An adhesive tape closure as in claim 2, wherein the adhesive coating has been inactivated by applying a coating.
5. An adhesive tape closure as in claim 1, wherein said backing is light transmissive.
6. An adhesive tape closure as in claim 1, wherein said backing is constructed of a material of selected from a group consisting of polyester, bi- or monoaxially oriented or nonoriented polypropylene, polyvinyl chloride, polyethylene-coated paper or polyethylene.
7. An adhesive tape closure as in claim 3, wherein said cover sheet has on the side facing said adhesive an adhesive-repellent surface coating.
8. Adhesive tape as in any one of claim 3 wherein said cover sheet and said backing thereon are perforated or partly incised in a direction transverse to the longitudinal direction of the adhesive tape closure.
9. An adhesive tape closure as in claim 3 wherein said cover sheet is narrower along one side than said backing to form a pocket to which has an opening transverse of the longitudinal direction of the tape for the introduction of a sheet member in between said cover sheet and the container to which the adhesive tape closure is applied.
10. An adhesive tape closure as in claim 3 wherein said cover sheet is narrower than said backing thereon along both sides and in that said backing has therein a slot extending over the width of cover sheet to cause pocket to be formed which has an opening in the longitudinal direction of the tape for introducing information in between the adhesive tape and the container to which it is adhered.
11. An adhesive tape closure as in claim 3 wherein said cover sheet includes indicia.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP4036985.4 | 1990-11-20 | ||
| DE4036985A DE4036985A1 (en) | 1990-11-20 | 1990-11-20 | Adhesive sealing strip for cardboard boxes, etc. - comprises adhesive-coated carrier with intermittent non-adhesive sections and non-adhesive backing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2055402A1 true CA2055402A1 (en) | 1992-05-21 |
Family
ID=6418626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002055402A Abandoned CA2055402A1 (en) | 1990-11-20 | 1991-11-13 | Adhesive tape closure |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0497823U (en) |
| CA (1) | CA2055402A1 (en) |
| DE (1) | DE4036985A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2360268A (en) * | 2000-07-27 | 2001-09-19 | Aew Thurne Ltd | Bag tying machine |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4312446A1 (en) * | 1993-04-16 | 1994-12-15 | Beiersdorf Ag | Label with handle tab |
| DE9407731U1 (en) * | 1994-05-10 | 1994-07-07 | Bernhardt Johannes | Portioned self-adhesive tape |
| CA2192765C (en) * | 1996-12-12 | 2006-08-29 | Cheng-Kang Kao | Water-retardent, easy-tearing film lamina |
| DE29801763U1 (en) * | 1998-02-03 | 1999-07-22 | Pelz & Co Kg W | Box of cotton swabs |
| DE102004032391A1 (en) * | 2004-07-02 | 2006-01-26 | Tesa Ag | At least part of the surface equipped with self-adhesive composition |
| DE102005044517A1 (en) * | 2005-09-16 | 2007-03-22 | Tesa Ag | self-adhesive tape |
| DE102011078037A1 (en) * | 2011-06-24 | 2012-12-27 | Herbert Klumpp | Unit for gripping end of single-sided adhering adhesive band for use in packaging machine for closing block-shaped body of folding box for transporting goods, has planarly designed element partially adhered with end of band on adhesive side |
| CN106005593B (en) * | 2016-06-30 | 2018-07-27 | 北京联合大学 | A kind of bubble chamber sealing baling press and its packaging method |
| CN107236476A (en) * | 2017-05-23 | 2017-10-10 | 林世峯 | Quickly smooth it can tear off the tape system that packaging case lid is sealed |
| CN108839886A (en) * | 2018-06-22 | 2018-11-20 | 浙江顺福印业有限公司 | A kind of novel easily-torn packaging box |
| JP6661816B1 (en) * | 2019-06-28 | 2020-03-11 | 株式会社キングパッケージ | tape |
-
1990
- 1990-11-20 DE DE4036985A patent/DE4036985A1/en not_active Withdrawn
-
1991
- 1991-11-13 CA CA002055402A patent/CA2055402A1/en not_active Abandoned
- 1991-11-20 JP JP1991095185U patent/JPH0497823U/ja active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2360268A (en) * | 2000-07-27 | 2001-09-19 | Aew Thurne Ltd | Bag tying machine |
| EP1176095A1 (en) | 2000-07-27 | 2002-01-30 | AEW-Thurne Ltd | Bag tying machine |
| GB2360268B (en) * | 2000-07-27 | 2002-02-20 | Aew Thurne Ltd | Bag tying machine |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4036985A1 (en) | 1992-05-21 |
| JPH0497823U (en) | 1992-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |