Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – With work feeding or handling means
Reexamination Certificate
1999-02-23
2002-09-17
Crispino, Richard (Department: 1734)
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
With work feeding or handling means
C156S574000, C156S579000, C118S200000, C118S257000
Reexamination Certificate
active
06450231
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a coating film transfer apparatus capable of applying a transfer coating film such as corrective coating agent, fluorescent paint or adhesive agent, affixed to a surface of a coating film tape via a releasing agent layer by pressing the same tape onto a paper surface from a rear side thereof to transfer the same coating film to a desired position of the paper surface, and then separating an excessive portion of the transfer coating film from an already applied coating film.
2. Description of the Prior Art
In a coating film transfer apparatus according to a known conventional art, a transfer coating film is composed of a corrective coating film and a corrective tape is formed by attaching this transfer coating film to a surface of a base tape via a releasing layer. A reel around which this corrective tape is wound is provided in a case, and the corrective tape is fed along a front end of a pressing lever projecting through a cutout hole provided in the case in a condition that the corrective coating film side faces outward, then reversed at the front end and wound up by another reel in the case. In this process, by pressing the front end of the aforementioned pressing lever onto a position having a written letter desired to erased, the corrective coating film on the surface of the corrective tape is affixed to the desired position and after that, an excessive portion of the corrective coating film is separated by cutting off.
Typical arts of the conventional ones are described in following reference documents.
(1) Examined Published Japanese Patent Application No.HEI3-11639
(2) Examined Published Japanese Patent Application No.HEI3-66159
(3) Examined Published Japanese Patent Application No.HEI6-33125
Further, such an art in which a place to be erased is worn by making an adhesive tape into a sliding contact with that place and removed dust is made to stick to the adhesive tape, has been described in a following reference document.
(4) Unexamined Published Japanese Patent Application No.SHO50-152834
On the other hand, hand-grip type adhesive tape feeding apparatuses considered to be related to the present invention more or less have been described in following reference documents.
(5) U.S. Pat. No. 3,274,0381
(6) U.S. Pat. No. 3,505,153
(7) EP No.0551522A1
The inventions described in the above-mentioned reference documents have following problems.
(1) Examined Published Japanese Patent Application No.HEI3-11639
A pointed head (
6
) is provided and a front end thereof is triangle-shaped, having no thickness. Therefore, following problems are noticed.
(a) Upon erasing, a front end portion
6
a
of the head
6
is pressed on a paper surface not at right angle but in a condition that the front end portion
6
a
is inclined relative to the direction of advancement of the head
6
. Therefore, if a large pressing force is applied, the front end of the head
6
is warped to an opposite side so that the head
6
comes into a contact with the paper through a curved surface thereof having a slight width in the direction of the advancement.
Thus, corrective coating material is pressed over a wide range of the paper at the same time, so that it becomes difficult to affix the corrective coating material accurately to a desired position. Further, there may occur a case in which the surface of the affixed corrective coating material is shaved more than required, thereby deteriorating the surface condition.
(b) Because the front end portion
6
a
of the head
6
is pointed and thin, when the corrective tape is folded along the front end of the head
6
and wound back, there is a fear that this folding portion becomes a sharp angle so that the corrective tape itself is cut down.
Further, the front end portion
6
a
of the head
6
is likely to chip or break down.
(c) If the front end portion
6
a
is warped as mentioned above when the head
6
is pressed, it is difficult to see the termination of the corrective coating material on the paper precisely and it is also difficult to separate the corrective coating material accurately at this termination. Therefore, to cut off the corrective coating film affixed to the paper surface in a good manner and effectively, it is necessary to raise the printer head substantially at right angle relative to the transferring face after the transfer is completed and then lift it up. However, such a procedure is troublesome and ineffective.
(2) Examined Published Japanese Patent Application NO.HEI3-66159
Although the front end portion
22
of a transfer head
20
has a substantially inverse triangle section, a front end face
22
a
thereof is not pointed, but an inverse-V shaped groove
25
facing in the advancement direction is provided.
Therefore, the corrective tape
11
is pressed on a paper through two protrusions in front of and behind the inverse-V shaped groove
25
on the transfer head
20
, so that a pressing force for the corrective coating material onto the paper is weak in the middle of the groove
25
.
Further, forming the V-shaped groove
25
on a narrow front end portion of the transfer head
20
takes time and labor.
(3) Examined Published Japanese Patent Application No.HEI3-33125
Although a tape is reversed along a press-fit edge
14
′ which is a front end of a rubbing lined piece
14
, because this press-fit edge
14
′ has roundness, following problems exist.
(a) Because it is difficult to see clearly around the press-fit edge, a transfer start position cannot be determined easily.
(b) A film
5
a
on a support sheet
5
or a coating film cannot be separated from the press-fit edge
14
′ accurately at a desired position or this is very difficult.
(4) Unexamined Published Japanese Patent Application No.SHO50-152834
A tape (a) in which an adhesive agent layer (b) is formed on an entire surface thereof is brought into a contact with a position desired to be masked by a roller
8
, so that the adhesive agent is peeled and made to stick to a paper. Because the tape (a) is pressed onto the paper surface by the round roller
8
, it is almost impossible to make the tape into contact with a limited position on the paper accurately.
Further, the roller
8
has only a function for pressing the tape (a) but cannot cut off the adhesive agent layer (b).
(5) U.S. Pat. No. 3,274,038
This apparatus comprises only a feeding reel in which adhesive agent
15
is provided on the surface of a liner
14
. A winding tape
10
is fed out from a core
11
. A tape contacting portion
20
for bringing the tape
10
into contact with a paper surface
30
is laterally cylindrical.
Therefore, like the reference document 3, it is difficult or impossible to apply adhesive agent
15
selectively and accurately to a desired location.
Additionally, an excessive portion of the adhesive agent
15
cannot be cut off accurately and sharply at a desired position of the liner
14
.
(6) U.S. Pat. No. 3,505,153
Because a front end portion
52
of a nose is hidden by an adapter plate
20
and a front end portion of the adapter plate
20
has a pretty width, a wide range around the front end thereof is hidden, so that it is difficult or impossible to affix a tape (T) accurately to only a desired location. Thus, sometimes, a letter not desired to be erased is erased or a letter desired to be erased is left unerased.
Further, a top portion of the front end portion
52
is flat and is not protruded from side plates
14
. In this apparatus, the tape is entirely only pressed to a location desired to be erased and its tape cutting performance is low.
(7) EP No.0551522A1
A tape
19
is guided and a tip of a pointed portion
18
for folding back the tape is a sharp, triangle shape.
Therefore, this invention has a similar problem as that described in the aforementioned reference document 1.
SUMMARY OF THE INVENTION
The present invention has been achieved to solve the above problems and therefore, it is an object of the invention to provide a coating film transfer apparatus wherein a corrective tape or
Crispino Richard
Purvis Sue A.
Tombow Pencil Co. Ltd.
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