Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2001-06-29
2004-10-19
Osele, Mark A. (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S577000, C242S171000, C242S588600
Reexamination Certificate
active
06805762
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a film transfer tool for use in transferring a stratified film provided on a film transfer tape to the surface of a paper for correcting a letter or letters.
As is disclosed in, for example, Japanese Examined Patent Publication No. 47-40543, a film transfer tool is known in which a feed reel and a take-up reel which are adapted to interlock with each other via a power transmission means are disposed within a case, whereby a film transfer tape is fed out from the feed reel so as to be moved over the surface of a paper while being pressed against the surface of the paper with a transfer head protruding from the case, and the film transfer tape is then taken up by the take-up reel as a tape from which a film has been transferred.
In the conventional example, the transfer head is constituted by the transfer roller, whereby a film transfer tape is pressed against the surface of a paper so as to transfer a film to the surface of the paper while the transfer roller is being rotated, and since the transfer roller having a large outside diameter is used, there is a limitation to the scope of application of the film transfer tool of this type. Namely, spaces between letters of normally used word processors are substantially 0.5 mm, and such a conventional transfer roller cannot be disposed in any of those narrow spaces between the letters of the word processor to transfer a film onto a letter contiguous to any of the spaces. To cope with this, a transfer head comprising a small piece having a triangular cross section has been used as a transfer head that can be disposed in the narrow spaces between the letters, but that type of transfer head does not roll as a roller does, and therefore a pressing force (transfer load) which is greater than required is destined to be exerted on the transfer tape. Thus, with this transfer head it is not always ensured that a smooth transfer operation can be carried out.
The present invention relates to a method for producing a small diameter roller for use for a transfer head of a film transfer tool.
Conventionally, there have been filed many applications for patent on film transfer tools for correcting typographical errors. For example, Japanese Utility Model Unexamined Publication No. 6-73026 discloses a film transfer tool in which a spatula-like transfer head is provided at a distal end of a main body of the tool for handling a film transfer tape so as to transfer a transfer film onto the surface of a paper.
A film transfer tool of this type is generally referred to as a spatula-like head type film transfer tool, and since they are easy to be produced, film transfer tools of the type have been used widely. In this type of film transfer tools, however, there has been a case where the surface of a paper is scratched on an end of the head in transferring a film, and moreover there has been often a case where in trying to transfer a film so as to overlap the film that has just been transferred the lower film is scraped with the spatula-like transfer head. Widths of currently marketed film transfer tapes range from 3 mm to 6 mm and film transfer tapes are classified into a plurality of types for smaller to larger letters, respectively. So, if film transfer tapes of those types are used appropriately depending on widths of letters to be corrected, letters can be corrected at one time without transferring film on film in an overlapping fashion. However, from the consumers' point of view, it is economical buying a film transfer tape of an intermediate width to transfer film on film in an overlapping fashion depending on the width of letters to be corrected rather than buying several film transfer tapes of different widths. Due to this, there have been many consumers who make a practice of doing this, and therefore it is important to solve the problem that film cannot be transferred on film in the overlapping fashion.
In addition, the spatula-type head has the following problems:
as a fatal problem attributed to the construction thereof, the film transfer tape is easy to slide transversely while being fed;
the film cannot be not properly transferred if the main body of the film transfer tool is inclined while being in use and;
if it is not strong, the film cannot be transferred.
Adopting a roller type transfer head is one of solutions to the aforesaid problems. With the transfer head being a roller, even if the end of the transfer head is brought into contact with the surface (of a paper) to which film is being transferred, the transfer head only rolls on the surface without scratching the same, and therefore there is no risk of the lower film that has been transferred before being stripped off by the transfer head. This type of transfer head is known as a roller type transfer head, and not only the roller type transfer head is effective in solving the problem with the film-on-film overlapping transfer of film, but also it makes difficult for the film transfer tape to deviate transversely during a film transfer operation to thereby provide the user of the transfer tool with a better handling feel. This makes it easy to transfer film directly on a letter or letters to be corrected. In addition, the property that the film transfer tape is difficult to deviate transversely is effective in solving the problem that the film transfer tape is dislocated from the transfer head during a film transfer operation.
Thus, the roller type transfer head provides superior features, but it has been difficult to produce a small diameter roller for use in the film transfer tool. Due to this, products have been widely marketed which find no problem with being provided with a roller of a relatively large diameter such as a transfer tool for a gluing tape, but roller type film transfer tools which need to be provided with a roller of a small diameter have not yet been widely marketed as a product.
Conventional production methods of small diameter rollers and problems inherent therein will be described below.
(1) Two-color Injection Molding Method
According to this production method, a shaft which has been injection molded is injection molded again for provision of a resilient film.
In this method, the shaft is made from resin, the shaft needs to have a certain thickness so as to provide a sufficient strength in use. In addition, even in the molding process, since an injection pressure of a certain magnitude is exerted on the shaft while the shaft is being subjected to a second injection, the shaft needs to be strong, and therefore, it has been difficult to produce a small diameter shaft.
(2) Compression Molding
Compression molding requires two molding operations to be carried out, which leads to problems of high costs and an expensive mold. In addition, this method can provide only a low processing accuracy, and therefore the method has not been suitable for production of small diameter shafts.
(3) Resilient Tube Fitting Method
According to this production method, a tube made of a resilient material is forcibly fitted on a metallic or resin shaft. This method can provide only weak adherence and has suffered a problem that the resilient tube deviates transversely from the shaft when the transfer head is strongly pressed against the surface of a paper during a film transfer operation.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a film transfer tool suitable for a smooth transfer operation of transfer film for putting a transfer tape to a space between letters.
The present invention is, as means for solving above object, provides a film transfer tool in which a feed reel and a take-up reel which are adapted to interlock with each other via a power transmission means are disposed within a case, whereby a film transfer tape is fed out from the feed reel so as to be moved over the surface of a paper while being pressed against the surface of the paper with a transfer head protruding from the case, and the film transfer tape is then taken up by the take-up reel as a tape from which a film has b
Narita Yasuo
Takahashi Katsuaki
Osele Mark A.
Plus Stationery Corporation
Swidler Berlin Shereff & Friedman, LLP
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