Patent Application
20050008816
Not Applicable.
Not Applicable.
Not Applicable.
1. Technical Field
This invention relates to a roll of paperband including a core formed from at least one element having a non-uniform and non-planar outer surface and a covering member about the core.
2. Prior Art
It is common practice in the papermaking and packaging industries to employ a paperband or strap that is loaded into a channel of a track assembly and then removed rapidly out of the channel and employed to cut and spool a web of paper onto an empty spool or to be used to wrap around and secure a load, container or a bundle of material. Because the paperband should be stiff enough to be pushed into the channel from one end thereof, the band may twist or otherwise be distorted or separated during upward movement that is accomplished by a “stripping” action during removal from the paperband track assembly. This becomes a very important consideration in those applications where the width of the channel opening is made less than the width of the band or tape and the lower tape-carrying guide way of the channel in order to cover and carry the tape. An improved paperband is disclosed herein that greatly reduces the distortion and crimping common to prior art paperbands, reduces the wear on the guide way channel and its cover, and also reduces the separation of layers in bands made from multiple layers and from yarns formed side-by-side into a cutting or banding tape.
In view of the foregoing background, it is therefore an object of the invention to provide a roll of paperband that overcomes the above-noted shortcomings. These and other objects, features, and advantages of the invention, are provided by a paperband for use in paper web cutting and turn-up systems or for use in bailing wherein an elongate core includes an elongate element having a longitudinal axis with a plurality of longitudinal creases disposed throughout to form the core with a non-uniform and non-planar outer surface. An elongate covering member is folded about the core, and includes a generally smooth outer surface extending along the core and having a central long axis and side edge portions spaced from and substantially parallel to the central axis with one side edge portion overlapping another side edge portion and adhesively attached to each other and the core is adhesively attached to the covering member.
Other aspects are seen in the plurality of longitudinal creases defining a plurality of randomly non-uniform fold angles relative to a plane of the core, and providing differing spatial dimensions therebetween. The element and covering member are deformable to permit formation into predetermined shapes particularly having a generally rectangular cross-sectional shape. Further, at least another element, being substantially a similar element, which is disposed side-by-side and substantially parallel to each other along longitudinal axes. The paperband has elongate outer edge portions spaced from the longitudinal axes, which extend substantially equidistant laterally inwardly and form thin and pliable portions which are readily bendable upwardly and downwardly to permit ease of release from a slotted track of a web turn-up system. Such pliable portions may have a plurality of creases extending laterally thereacross for providing a serrated surface to enhance cutting of a paper web in a web turn-up system. The core may be thicker along the longitudinal axis. The multiple creases of the core material provides an increase in the tear resistance of the paperband. The element may be twisted generally about its axis prior to being enveloped by the covering member. The element may be shredded into ribbons along its axis prior to being covered by the covering member. The shredding of inner member into a plurality of elements provides an increase in the tear resistance of the paperband. The ribbons would be adhesively bonded together and to the covering member. Such adhesive bonding of the shredded inner member to each other and to the covering member enhances the overall strength of the paperband.
Additional aspects are found in the core being formed of paper, as well as the covering member. The element may be convoluted along the axis prior to being covered by the covering member. The core may include at least another element that is convoluted along its axis, with adhesive attaching the elements together. The core may include a plurality of other elements stacked on each other and shredded into ribbons with the ribbons adhered together prior to, or while being covered. The adhesive means is preferably water-soluble and biodegradable, as well as the bonding means. The core may be formed in whole or part of synthetic material, as well as the covering member. The element may be longitudinally scored or perforated adjacent its respective edges prior to being covered by the covering member causing the element to be bendable therealong, allowing for a more random orientation of the core material.
Even further aspects are to be found in a roll of paperband for use in paper web cutting and turn-up systems or for use in bailing including an elongate core having a longitudinal axis and a plurality of elongate elements disposed non-uniformly throughout and adhesively connected together with air spaces throughout and an elongate covering member having a central axis and thinner than and folded about the core with overlapping side portions space form and substantially parallel to the central axis. The covering member having a generally smooth outer surface extending along the core and adhesive means attaches the overlapping side portions together and bonds the core to the covering member. The adhesive means may be dispersed on the outer surface of the covering member so that the band is usable as a strapping paperband and to enable the band to adhere to itself when the adhesive is activated by heat and/or moisture and overlapped and pressed together.
The novel features believed to be characteristic of this invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and method of operation, together with further objects and advantages thereof, may best be understood by reference to the following description taken in connection with the accompanying drawings in which:
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the true scope of the invention to those skilled in the art. Like numbers refer to like elements throughout, and prime and double prime notations are used to indicate similar elements in alternative embodiments.
The paperband of this invention is referred to generally in
An adhesive 15 is sprayed on the elongate element 12 to cover its outer surface 13 and is dispersed in some of the creases and will ultimately stiffen same and increase the tensile strength of the paperband. The adhesive 15 may be a conventional adhesive, such as PVA, as readily known in the paper industry and is preferably water-soluble so that it can be recycled during pulping operations. The adhesive may also be biodegradable for not damaging the environment should the paperband not be recycled.
Element 12 also could be twisted or rotated about its respective longitudinal axis for providing additional tensile strength. Thus, as element 12 is twisted, it is more tightly wrapped about its axis to provide a stiffer core 11. Such a stiffer core 11 assists in providing better cutting performance during spooling operations and bailing operations. Of course, the elements 12 may be formed from varying combinations of engineered materials to create a multiplicity of tensile and torsion strengths.
A covering member 16 is folded about the core 11 and is bonded thereto by the adhesive 15, which is preferably applied uniformly along the core 11 of the paperband 10. The outer surface 17 of the covering member 16 is generally smooth and planar but is sufficiently thin for allowing the covering member 16 to conform to the contoured cross-sectional shape of the element 12. Accordingly, the covering member 16 maintains substantially continuous contact around the core 11 and forms a substantially rectangular or cylindrical cross-sectional shape thereabout when the paperband 10 and adhesive dry.
The covering member 16 includes overlapping side portions 18, 19 oppositely spaced from its longitudinal axis and extending parallel thereto along the length of the paperband 10. The overlapping side edge portions 18, 19 extend equidistantly and inwardly from sides 20, 21, respectively, and overlap for bonding together. Such overlapping side portions 18, 19 are preferably bonded by adhesive 22 which may be the same type of adhesive as adhesive 15 previously described. The bonding of the overlapping side portions 18, 19 envelopes the core and prevents same from separating during use of the paperband in normal operating conditions.
During the gathering process or immediately following this process, the core 11 can be sprayed, coated or otherwise treated, in a manner well-known in the art, with a water-soluble adhesive in order to enhance the rigidity of the core and the resultant paperband 10 in a fixed geometry. Further, the paperband 10 may be coated with specialty chemicals for providing the paperband with engineered properties such as fire retardant and water repellent properties, as well known in the art.
Now referring to
Similar to the previous embodiment shown in
Of course, the embodiment of
Now referring to
The cavity 29 envelops the core 11″ including one or a plurality of elements 12″ disposed adjacent to each other along their respective lengths. Such elements 12″ may randomly be placed in a non-uniform pattern next to each other so that the cavity 29 will bulge at the center thereof. Again, such paperband 10″ may be formed by passing it through a pair of opposed rollers (not shown) having a slight depression in each surface thereof to produce the paperband 10″. The covering member 16″ overlaps at its side portions 18″, 19″, similar to the previous embodiments, and are bonded to each by an adhesive 22″. The elements 12″ may also be twisted about the respective longitudinal axis and include adhesive 15″ thereon for bonding to each other.
The outer side edge portions 30, 31 are preferably thin and pliable and extend equidistantly inward from the outer side edges of the paperband 10″. Such outer side edge portions 30, 31 extend substantially parallel to the longitudinal axis and along the length of the paperband and preferably include creases 26, 27 extending laterally thereacross for providing a serrated edge and for enhancing the cutting performance of the paperband 10″ during spooling operations. Such creases 26, 27 may be substantially equally spaced apart or selectively disposed along the length of the outer side edge portions 30, 31 and preferably do not penetrate through the surfaces thereof. Such creases 26, 27 may also be provided by the same rollers (not shown) mentioned hereinabove to form a bulge along the mid-portion of the paperband or can be provided by two opposing pairs of spaced rollers positioned along the respective edges of the paperband.
The above-mentioned embodiments of the present invention are preferably formed from repulpable materials such as paper or conventional synthetic materials known in the art. The materials selected may be of various physical and/or chemical properties such as tensile strength, wet strength, extensibility, etc., to allow for maximizing the band for the intended application and use required. All adhesives are preferably water-soluble and/or biodegradable so that they may be recycled during repulping operations. The thickness of the paper used to form the covering member and the core elements may vary so that the thickness of the covering member is preferably thinner than the thickness of the resulting core elements.
Now referring to
As previously discussed the inner core 50 and the outer covering 55 may be of various materials to secure appropriate physical properties having a multiplicity of attributes, such as tensile strength, stiffness, compressibility of the band between its upper and lower surfaces can be achieved.
While the invention has been described with respect to certain specific embodiments, it will be appreciated that many modifications and changes may be made by those skilled in the art without departing from the spirit of the invention. It is intended, therefore, by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the invention.
