Abrading – Machine – Endless band tool
Reexamination Certificate
2003-04-25
2004-06-01
Nguyen, Dung Van (Department: 3723)
Abrading
Machine
Endless band tool
C451S178000, C451S311000
Reexamination Certificate
active
06743084
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to an emery-polishing machine, particularly to one applicable to carpentry.
2. Description of the Prior Art
A conventional emery-polishing machine
10
for carpentry, as shown in
FIG. 1
, includes a machine box
11
provided with a conveyer
12
for carrying a work to be polished. An emery-polishing unit
13
consisting of two emery-polishing wheels
131
is provided above the conveyer
12
and driven by a motor (not shown) to actuate the two emery polishing wheels
131
to rotate. Each emery-polishing wheel
131
is fitted with an emery paper tape
131
A on the circumferential surface for polishing the surface of a wooden board. Besides, the machine box
11
is provided with plural dust-collecting pipes
111
positioned above the two emery-polishing wheels
131
and connected with a dust-collecting device for preventing dust from floating about. The conventional emery-polishing machine
10
has a function of polishing the surfaces of a wooden board, but it has some defects described below.
1. The two emery polishing wheels
131
are fixedly positioned, impossible to be adjusted in height, therefore only emery paper tape
131
A of same-sized sands can be attached on the emery polishing wheels
131
for use. If emery paper tape
131
A of different-sized sands are simultaneously attached on the two emery-polishing wheels
131
for use, the comparatively thin emery paper tape
131
A of fine sands will fail to contact the surface of a wooden board to carry out polishing. Under the circumstances, to polish the surface of a wooden board, the emery polishing wheels
131
of the emery-polishing machine
10
have to be first attached thereon with coarse-sand paper tapes
131
A for carrying out rough polishing. Subsequently, the coarse-sand paper tapes
131
A are replaced with fine-sand paper tapes
131
A and the conveyer
12
is adjusted in height for carrying out fine polishing, thus wasting mach time in replacing the emery paper tapes
131
A repeatedly, lowering working efficiency and increasing cost.
2. The emery polishing machine
10
can only carry out polishing on one side of a wooden board at a time. To have the opposite side polished, the wooden board has to be turned over and moved to the feeding opening
14
a new for carrying out polishing, and when moved to the feeding opening
14
, the wooden board has to by-pass one side of the emery polishing machine
10
because plural dust-collecting pipes
111
are positioned on top of the emery polishing machine
10
, thus taking much labor and space.
SUMMARY OF THE INVENTION
A main objective of the invention is to offer an emery-polishing machine able to have its emery polishing wheels micro-adjusted to move upward and downward independently. Thus, the two emery-polishing wheels can be fitted thereon with emery paper tapes of different-sized sands according to practical needs to carry out rough and fine polishing on a wooden board at one round of conveying, able to heighten working efficiency.
Another objective of the invention is to offer an emery polishing machine having two dust-collecting pipes provided at one side of its dust-collecting cover above two emery polishing wheels, and having plural units of rollers provided on the dust-collecting cover. Thus, after polished on one side, a wooden board can be turned over and directly placed on the rollers to be slidably moved to a feeding open in g for carrying out polishing on the opposite side, able to transport a wooden board quickly with less force.
REFERENCES:
patent: 5056272 (1991-10-01), Battaglia
patent: 6001004 (1999-12-01), Botteghi
patent: 6299512 (2001-10-01), Costa et al.
patent: 6299517 (2001-10-01), Weber
patent: 6342000 (2002-01-01), Yan
patent: 6602118 (2003-08-01), Johnson
Nguyen Dung Van
San Ford Machinery Co., Ltd.
Troxell Law Office PLLC
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