Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Reexamination Certificate
2000-11-15
2002-08-20
Osele, Mark A. (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
C156S579000, C118S076000, C118S257000, C242S160400, C242S171000, C242S588600
Reexamination Certificate
active
06435248
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an applicator for transferring a transfer material like a correction paint or a paste applied to a surface of a transfer tape to a substrate surface in order to correct an error in writing, etc. or effect a bonding, and especially to a transfer head as a part of the applicator.
2. Description of the Related Art
A conventional applicator of a type referred to above comprises an elastic tongue piece for pushing and closely contacting not-yet-used transfer tape onto a substrate surface from behind, and guide plates for regulating a fluctuation of the transfer tape when running. Especially, as to the elastic tongue piece of the transfer head, there are, besides a steeple shape one in which each tape running surface at a substrate surface side (upstream side) and a transfer tape discharge side (downstream side) is formed so as to be sharpened towards a tip (Japanese Patent Publication No. 11639/1991), one in which, in order that the not-yet-used transfer tape is surely and closely contacted with the substrate surface and pressure is surely transmitted to the transfer tape, a tape running surface of the substrate surface side is made as a curved surface while being sharpened towards the tip and a tape running surface at the used transfer tape discharge side is made flat, and one in which a tape running surface at the substrate surface side of the elastic tongue piece of the transfer head is made as a curved surface while being sharpened towards a tip and a tape running surface at the used transfer tape discharge side is also made as a curved surface both having a same radius of curvature while being sharpened towards the tip.
However, as to the above conventional transfer head, especially as to the elastic tongue piece thereof, when each tape running surface at a substrate surface side and a transfer tape discharge side is formed so as to be sharpened toward a tip, when the transfer tape is pushed and closely contacted from behind, a transferring surface of the elastic tongue piece is a completely flat surface, so that a contact with the substrate surface becomes a face contact. Thus a pressure exerted by a user is dispersed, thereby making it impossible to evenly transfer/apply a correction paint, etc. from the transfer tape to the substrate surface. Moreover, as to the steeple shape one, since its foremost portion is bent at an acute angle and plural bent points are generated depending on circumstances, if it is one producing a large resistance owing to the fact that a substance such as paste applied on a surface of the transfer tape adheres to the substrate surface, it may result in that the transfer tape running on the bent points of the steeple shape elastic tongue piece is folded, so that the transfer tape is prevented from being smoothly fed/wound under the influence of a running resistance exerted to the transfer tape and, further if the running resistance exerted to the transfer tape is excessively large, the transfer tape itself may be cut off. Moreover, in a tape running surface at the transfer tape discharge side, since there is no member for guiding a discharged transfer tape, the discharged transfer tape becomes liable to fluctuate vertically and horizontally, so that there is such a disadvantage that, in case where an application operation is continuously performed, the transfer tape is deviated from the tape running surface and, therefore, there is a problem that for a user the operation becomes very complex.
Further, when a tape running surface at the substrate surface side is made into a curved surface while being sharpened toward a tip and a tape running surface at the used transfer tape discharge side is made flat, since an area of the tape running surface at the substrate surface side becoming closely contacted to the substrate surface is certainly large, it is possible to evenly push the not-yet-used transfer tape from behind over a wide range, to surely and closely contact the transfer tape to the substrate surface, and to evenly and surely transfer/apply the correction paint or the paste applied to its surface to the substrate surface. However, similarly to the foregoing steeple shape one, if a large resistance is produced owing to the fact that a substance such as paste applied on a surface of the transfer tape adheres to the substrate surface, it becomes impossible that the used transfer tape, in combination with a resistance generated by the fact that the used transfer tape is folded at a tip of the elastic tongue piece being made a starting point, is smoothly run in a direction towards a winding reel of a transfer tape feeding/winding mechanism contained in an applicator body, so that there is a fear that a smooth operation for transferring/applying a paste or correction paint cannot be performed.
Further, in case where the transfer head, especially the elastic tongue piece is one in which a tape running surface at the substrate surface side of the elastic tongue piece of the transfer head is made into a curved surface while being sharpened toward a tip and a tape running surface at the used transfer tape discharge side is also made into a curved surface with both having a same radius of curvature while being sharpened toward the tip, it follows that the used transfer tape runs while being guided by a surface of the elastic tongue piece of the transfer head, so that a fluctuation of the transfer tape on the tape running surface at the side discharging the transfer tape can be prevented. However, since a large resistance is generated when the transfer tape runs on the tape running surface at the discharge side through the tape running surface at the substrate surface side and since, even if the tape running surface at the used transfer tape discharge side is sharpened toward a tip with the same radius of curvature as the curved surface on the tape running surface at the substrate surface side, its shape is also sharpened at a foremost end, of the elastic tongue piece of the transfer head, connecting the tape running surface at the substrate surface side to the tape running surface of the discharge side, it follows that the used transfer tape is folded similarly to the foregoing one, so that a large resistance is generated and, therefore, there is still a fear that a smooth running of the transfer tape at the transfer head is hindered.
Further, there is proposed an applicator in which a transfer head is provided with an elastic pushing body capable of being elastically deformed by a force exerted thereon when transferring, each corner portion of the elastic pushing body is formed into an arc-like surface and, further, one of the corner portions is formed so as to have a larger radius of curvature than the other corner portion (Japanese Utility Model Registration No. 2551137). And, certainly it becomes one which can evenly transfer/apply a correction paint, etc. by the fact that the transfer tape is pushed and closely contacted onto the substrate surface from behind by the one arc-like surface corner portion having a smaller radius of curvature and which can surely transfer/apply the correction paint, etc. of the transfer tape surface to the substrate surface only for a required portion because the correction paint, etc. of the transfer tape surface is evenly cut by the fact that a pressure is applied to the transfer tape by the other arc-like surface corner portion having the larger radius of curvature, and it follows that, since a discharge of the used transfer tape is performed at the arc-like surface portion, it is smoothly discharged in comparison with the foregoing one in which a shape of the foremost end of the elastic tongue piece is sharpened. However, if it is attempted to evenly cut the correction paint, etc. of the transfer tape surface by exerting a pressure to the transfer tape via the other arc-like surface corner portion having the larger radius of curvature, it is unavoidable to further enlarge the radius of curvature in order to surely cut the correction
Birch & Stewart Kolasch & Birch, LLP
Osele Mark A.
Tombow Pencil Co. Ltd.
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