Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Means joining flexible indefinite length or endless bodies...
Patent
1985-01-25
1987-01-13
Kimlin, Edward
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Means joining flexible indefinite length or endless bodies...
156157, 156159, 156517, 156519, 156572, 1563041, B31F 506
Patent
active
046362797
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates generally to a tape splicing mechanism suitable for applying splicing tape to a junction between two adjacent ends of tape to be spliced. Such splicing is effected for repairing magnetic recording tape when broken, for editing magnetic tape and for connecting such tape to leader tape when loading such tape onto a reel or into a cassette. The present invention particularly concerns a mechanism for splicing magnetic tape for video cassette recorders, but is adaptable and adjustable to form splices in tapes of any form and over a wide range of widths.
BACKGROUND ART
Conventional tape splicing equipment generally acts from one face of the tape to be spliced, by preparing a portion of splicing tape or web, and securing this across a junction between two adjacent ends of tape to be spliced. Usually, adhesive tape is employed for this purpose, that is tape having a layer of adhesive on one face thereof. Alternatively, however, other fixing methods may be applied, for example the splicing tape may be attached to the tape to be spliced by friction welding, resistance heating or other fusion techniques.
One disadvantage of the known tape splicing mechanism is that if the tape to be spliced is in a loop it is necessary sometimes to displace the upper part of the loop in order to gain access to the joint. With wide tapes such as are used in video cassette recorders this leads to the possibility of creasing which has substantial disadvantages.
In prior art mechanisms where self adhesive tape has been used this has been guided over a roller system and the adhesive used for ensuring retention of the adhesive tape to its intended path. Such contact between the adhesive side of the splicing tape and the roller feed mechanism increases the frictional resistance which must be overcome in operation and can cause clogging and malfunction problems.
The object of the present invention is to provide a tape splicing mechanism which is fully automatic, and which can act from one side of the tape to apply splicing tape from a laterally displaced position so that the region immediately above the tape is not obstructed.
DISCLOSURE OF INVENTION
By the present invention there is provided a tape splicing mechanism for joining two free ends of tape to be joined by applying an element of splicing tape over the said two free ends of tape to be joined, characterised in that the mechanism includes means for severing an end portion of splicing tape from a standing length thereof drawn from a source of tape supply, and means for retaining the severed portion, the said retaining means being displaceable in a direction generally parallel to the plane of the severed porton of the tape to transfer it to an application position, and means for effecting application of the said severed portion of splicing tape to a tape to be spliced.
The actual application of the splicing tape to the tape to be spliced may be effected in one of a number of ways. Perhaps the most convenient of these is the use of self-adhesive tape.
In embodiments of the present invention self-adhesive splicing tape can be utilised without the adhesive side of the tape coming into contact with any part of the mechanism on its path from a supply roll to the application position. To achieve this the severed portion retention means preferably acts to retain the said severed portion of splicing tape by suction.
To facilitate the automatic operation of the mechanism it is preferred that the standing length of splicing tape is advanced from the source of supply automatically in a phased relation with the transfer of the severed portion of splicing tape to the said application position. This transfer of the severed portion to the application position can be parallel to the standing length of tape or at an angle to this length, for example at right angles to it, but in the preferred embodiment of the invention the direction of displacement is parallel to the standing length of splicing tape.
Preferably the standing length of splicing tape i
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patent: 3607572 (1971-09-01), Jorgensen
patent: 3664903 (1972-05-01), McCorkle
patent: 3749622 (1973-07-01), Sato et al.
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patent: 4019948 (1977-04-01), Hudalla et al.
patent: 4025384 (1977-05-01), Shiozaki et al.
patent: 4106974 (1978-08-01), Hirsch
patent: 4204898 (1980-05-01), King
patent: 4285757 (1981-08-01), Mori
Cashion Merrell C.
Kimlin Edward
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