Woodworking – Process – Securing
Reexamination Certificate
1999-11-18
2001-02-27
Bray, W. Donald (Department: 3725)
Woodworking
Process
Securing
C144S003100, C144S005000, C144S348000, C144S351000, C144S392000, C144S367000, C144S369000, C144S364000, C144S380000, C156S062400, C156S250000, C156S296000, C428S105000, C428S106000, C428S537100, C428S378000
Reexamination Certificate
active
06192949
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates generally to the bamboo blind slats, and more particularly to a method for making the bamboo blind slats.
BACKGROUND OF THE INVENTION
The slats of the conventional Venetian blinds are generally made of a PC or aluminium material, which is an industrial pollutant. With a view to protecting the environment, certain conventional Venetian blind slats are made of wood or bamboo.
The U.S. Pat. No. 5,896,903 discloses a method for making the bamboo blind slats. The method comprises a first step in which a selected bamboo stem of a predetermined length is split into a plurality of bamboo strips. The skins and the joints of the opposite sides of the bamboo strips are removed before the bamboo strips are bleached and preserved in a boiling solution of the diluted peroxide for more than 8 hours. The bleached and disinfected bamboo strips are then dried by baking and smoothed by grinding. The smoothed bamboo strips are covered with an adhesive coating, so as to enable the longitudinal sides of the bamboo strips to stick together such that the bamboo strips form together a rectangular bamboo plate, which is subsequently divided into a plurality of bamboo block s of a width. The periphery of the bamboo blocks is properly dressed. The dressed bamboo blocks are cut into a plurality of bamboo slats having a predetermined thickness. The bamboo slats are smoothed by grinding and are then covered with a foundation coat. The coated bamboo slats are airdried before they are covered with a face coating. Finally, the bamboo slat s are punch ed to accommodate the pull cords of a Venetian blind made of the bamboo slats.
Such a prior art method a s described above is not entirely efficient in that it involves at least
14
steps, which are inefficient and time-consuming at best.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a cost-effective method for making bamboo blind slats.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by the method comprising a first step in which a selected bamboo stem is split into a plurality of bamboo strips of a predetermined length. The skins and the joints of the opposite sides of the bamboo strips are removed before the bamboo strips are disinfected with the sulfur fume for at least 12 hours. The disinfected bamboo strips are subsequently dried by baking. The dried bamboo strips are covered with an adhesive coat. The coated bamboo strips are joined together along the longitudinal sides thereof in conjunction with a pneumatic press such that the coated bamboo strips are formed into a rectangular bamboo plate, which is then sliced into a plurality of bamboo slats, with each having a predetermined thickness. The bamboo slats are smoothed by grinding and are then covered with a base coat. The bamboo slats, which have been covered with the base coat, are provided with a layer of a face coat and subsequently punched to accommodate the pull cords of a Venetian blind made of the bamboo slats, which are highly resistant to pressure and deformation.
REFERENCES:
patent: 5896903 (1999-04-01), Chen et al.
Bray W. Donald
Browdy and Neimark
Nien Made Enterprise Co., Ltd.
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