Flexible or portable closure – partition – or panel – Plural strip – slat – or panel type – Venetian blind type
Reexamination Certificate
2000-02-24
2001-05-22
Lev, Bruce A. (Department: 3634)
Flexible or portable closure, partition, or panel
Plural strip, slat, or panel type
Venetian blind type
C160S17810R, C160S902000
Reexamination Certificate
active
06234235
ABSTRACT:
BACKGROUND OF THE INVENTION
a) Technical Field of the Invention
The present invention relates to an improved structure of a Venetian blind, and in particular, to a Venetian blind of simple structure such that the cost of manufacturing is low, and the blind has an aesthetic appearance.
b) Description of the Prior Art
FIG. 1
shows a conventional Venetian blind having a substantially U-shaped head rail
10
formed by bending an iron plate or by plastic molding. The bottom of the head rail
10
is provided with a plurality of ladder cords
11
spaced apart forming a support for a plurality of slats
12
. The bottom of the ladder cord
11
is provided with a heavy rod
13
, and the top of the ladder cord
11
is mounted to a control device
20
to control a control rod
21
of the control device
20
so as to elevate the slats
12
at the sides of the ladder cord
11
. Thus, the tilting angle of the slats
12
is adjusted to allow the amount of sunlight to enter. In addition, a plurality of vertical cords
14
, passing through individual slats
12
, are connected to the heavy rod
13
and one end thereof surrounds the head rail
10
. Due to the positioning device
30
at one side of the head rail
10
extended to the bottom of the blind forming into a lift cord
15
, the heavy rod
13
can be lifted up and the slats
12
are thus stacked one by one. By lowering the heavy rod
13
, the individual slats
12
return to their spaced apart position.
However, there are drawbacks found in this conventional Venetian blind as follows:
1) There are various specifications for the Venetian blind, which are not easily adapted to window of various sizes.
2) In order to comply with the size of the window, various types of head rails have to be made in order to insert the ladder cord
11
, the vertical cord
14
, the lift cord
15
and the control rod
20
. Thus, the cost of manufacturing is increased.
3) The strength of the conventional Venetian blind is insufficient as the head rail
10
is normally made from an iron plate and is bent into a “U” shaped structure. As there are a plurality of holes on the head rail
10
, it cannot withstand heavy weight.
SUMMARY OF THE INVENTION
The present invention relates to an improved structure of a Venetian blind, and in particular, to a Venetian blind of simple structure such that the cost of manufacturing is low, and the blind has an aesthetic appearance.
Accordingly, it is an object of the present invention to provide an improved structure of a Venetian blind having a head rail with a plurality of ladder cords and vertical cords vertically mounted and spaced apart therebelow, a plurality of slats being positioned between the ladder cords, and the vertical cord being formed into horizontal support, the bottom of the head rail being a lower rail, characterized in that the external edge of the head rail is mounted with an upper rail formed from plastic injection molding, and the cross-section of the upper rail is substantially a “U” shape and the edges of the upper rail are individually provided with two hook-like edges, and a plurality of holes are provided on the upper rail for the insertion of the ladder cords the vertical cords and a lift cord, thereby the upper rail of various sizes is adapted to the fixed size head rail.
REFERENCES:
patent: 1949653 (1934-03-01), Moore
patent: 4177853 (1979-12-01), Anderson et al.
patent: 5348068 (1994-09-01), Eisenheimer et al.
patent: 5391967 (1995-02-01), Domel et al.
patent: 5505418 (1996-04-01), Corcoran
patent: 5816308 (1998-10-01), De Hoyos
patent: 5845694 (1998-12-01), Cohen
patent: 5975184 (1999-11-01), Nien et al.
patent: 6009931 (2000-01-01), Peterson
patent: 6056035 (2000-05-01), Laster-Bivens
A & J
Lev Bruce A.
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