The present invention relates to an apparatus for refining paper materials, and more particularly, to a paper material refining apparatus including a built-in cleaner which separates foreign materials or substances by specific gravity to remove the same, which are hardly removed by a screen plate.
As an apparatus for removing dust and foreign substances from paper materials through a screen plate, a screen type paper material refining apparatus has been known. Also, as an apparatus for removing foreign substances from the paper materials by the difference of specific gravity while utilizing centrifugal force and liquid shear force, there is a cleaner or swirl type dust removing apparatus. In the cleaner, the foreign substances which can not be removed by the refining apparatus with the screen plate can be removed by difference of specific gravity. Therefore, after or before processing the paper material by the refining apparatus with the screen, the cleaner is connected thereto through a pipe, so that the dust and foreign substances are removed completely from the paper materials. However, when the cleaner is connected to the refining apparatus with the screen by the pipe, it requires a larger installation site, and pipe connection between the refining apparatus with the screen to the cleaner at the installation site to cause cumbersome.
Accordingly, an object of the present invention is to provide a paper material refining apparatus including a screen plate and a built-in cleaner so as to obviate the foregoing problems.
Further objects and advantages of the invention will be apparent from the following description of the invention.