Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Adhesive outermost layer
Patent
1988-11-30
1991-09-17
Davis, Jenna
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Adhesive outermost layer
428354, 428343, 156215, 156218, 156289, B32B 710, B32B 712, B29C 5356
Patent
active
050494457
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to masking tapes to be used when painting an area of a supporting surface, for instance of a motor vehicle to be spray-painted, to provide a clearly defined border between the area to be painted and an area to be masked by the tape and a sheet of a masking paper secured to the masking tape.
Masking tapes for this purpose are available on the market under the trade name Scotch 233,3M.RTM., Armac TG6.RTM., American Tape.RTM.. In practice, the masking work is generally carried out as follows. The tape is secured one turn or length around the surface to be masked out. The surface is covered with a masking paper, which is first cut to a size at which one edge of the masking paper will lie on a portion of the upper face of the masking tape. This edge of the paper is then in position, by applying thereto a further length of masking tape from the same roll, this further length of tape being affixed to both the first length of tape and the interlying edge portion of the masking paper, while ensuring at the same time that the border edge of the first length of tape is left completely free.
The work involved as described is relatively time consuming and also requires the application of at least two turns or lengths of masking tape, and moreover, a certain professional skill. A further drawback is that adhesion of the second length of masking tape to the upper face of the first length of tape is relatively poor or weak, resulting in a relatively poor adhesive bond between the two tape lengths. This is due to the fact that the upper face of the masking tape has been treated so that it will form but a poor attachment with the adhesive on the lower face of the tape to facilitate the tape being rolled up. When the two lengths of tape are subjected to extra large forces, e.g. in those regions where the tape lengths extend around arcuate defining edge-surfaces, such as when masking-out the window glass of an automotive vehicle, the uppermost or second tape will often detach from the underlying first tape as a result of this relatively poor bond, therewith leaving a gap through which leakage can occur. Thus, when the vehicle is sprayed with paint, the paint is able to penetrate this leakage gap between the two lengths of tape and reach onto the surface to be protected, which in turn results in an unacceptable border and costly extra work.
There is also known a proposed masking tape disclosed in DE-Al-27 46 502, filed in 1977 and abandoned 1980, comprising a strip of tearable material which when being affixed with its lower face to a supporting surface by means of pressure sensitive self-adhesive will expose an area with a pressure sensitive adhesive on its upper ace which will enable a masking paper to be secured to this upper face and to clear out the paper so that the cut edge of the masking paper will be located on the upper face of the strip at a predetermined distance from the edge of the strip forming the border.
This publication discloses four embodiments of a masking tape of which three embodiments would not be accepted by professionals, because they provide a border edge of the tape which will not be tightly fixed to the support surface and thus may give rise to leakage and an inaccurate border. Only the fourth embodiment proposes a masking tape which might be operative provided it could be manufactured at a reasonable price and wound to a roll from which the masking tape could be unwound and fixed to the supporting surface in a conventional and comfortable way. However, the German publication is lacking any information whatsoever as to how to manufacture the tape and store it in a roll which could be handled in an easy way.
What is revealed in the German publication regarding the fourth embodiment is that it consists of a strip which has two narrow longitudinal areas of pressure sensitive adhesive, each area having a width which is less than half the width of the strip, one adhesive area being disposed edge to edge with one side edge of the strip on its upper face, whereas the other ad
REFERENCES:
patent: 1726744 (1929-09-01), Krug
patent: 2328057 (1943-08-01), Coulter
patent: 2822290 (1958-02-01), Webber
patent: 2914167 (1959-11-01), Holtz
patent: 3096202 (1963-07-01), De Groot von Arx
patent: 3342675 (1967-09-01), Bouillenne-Wilrand et al.
patent: 3581884 (1971-06-01), Cladwell et al.
patent: 3940864 (1976-03-01), Kanzelberger
patent: 4389270 (1983-06-01), McClintock
patent: 4443783 (1984-04-01), Mitchell
patent: 4704315 (1987-11-01), McClintock
patent: 4770914 (1988-09-01), Torgerson et al.
Arvidsson Ola
Hilleby Magnus
Davis Jenna
Intermall AB
Zirker D. R.
LandOfFree
Masking tape and method for manufacturing rolls of such tape does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Masking tape and method for manufacturing rolls of such tape, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Masking tape and method for manufacturing rolls of such tape will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1916451