Roll-up type venetian blind

Details Roll-up type venetian blind Roll-up type venetian blind

2001-01-08

2002-04-09

Purol, David M. (Department: 3634)

Flexible or portable closure, partition, or panel

Roll type

Shiftable position roll

Reexamination Certificate

active

06367537

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to an improved roll-up type Venetian blind which is made up of an upper bracket and a plurality of roll-up slats. The upper bracket has a C-shaped receiving groove opened up downward and has a pair of cord passage holes at the left end and the right end respectively thereof. An adjustment unit is disposed on a front side wall of the left end of the upper bracket. Each roll-up slat is made up of a pair of flexible hook-shaped connectors that are reversely and integrally bound together to form a hollow chamber therebetween for ventilation. A number of partition plates are horizontally placed in the hollow chamber Each hook-shaped connector has an upper pivot hook end and a lower pivot hook end. The upper pivot hook end is smaller than the receiving groove but is larger than the opening of the receiving groove whereby the assembly of the Venetian blind becomes ready and fast so as to save time and labor in one aspect and the dissipation of heat of the Venetian blind is greatly advanced.
Referring to
FIG. 1
, a conventional roll-up type Venetian blind has an upper suspension rod
10
to which are attached a plurality of tubular slats
20
connected to one another by way of cords
11
to form a roll-up type slats structure of proper length. At both ends of the suspension rod
10
is disposed a cord passage hole
12
for the passage of a pull cord
13
which is engaged with the bottommost slat
20
so that the pull cord
13
can be pulled to roll up, as shown in FIG.
2
. The pull cord
13
is located in an adjustment device
14
and can be used to vary the height of the blind and fix the blind in place by the adjustment device when pulled in operation.
To roll up the blind
1
, the pull cord
13
is first pulled aside to release the adjustment device
14
and then the pull cord
13
is pulled downward with force. As a result of the pulling, the bottommost tubular slat
20
is forced to move upwardly and the other slats are pushed to roll up into a bundle as shown in
FIG. 2
by the pull cord
13
. Once the blind is pulled up to a certain position, the pull cord
13
is released and retained in place by the adjustment device
14
. To lower the blind, the pull cord
13
is first pulled aside to disengage the pull cord
13
from the adjustment device
14
, and then the pull cord
13
is release to withdraw upward so as to permit the blind to drop down. To fix the blind in position, the pull cord
13
is again pulled aside to make the adjustment device retain the pull cord
13
in place.
There are a number of disadvantages associated with such a prior slat structure:
1. Such a roll-up slats
20
are all connected to one another with cords
11
by manual labor to form a roll-up Venetian blind, resulting in waste of time and labor.
2. The tubular slats
20
are not closely connected to one another with a crevice unavoidably formed between every two slats, resulting in sun light easily cast into room via the crevices.
3. The tubular slats are joined together by thin threads
11
which are easily broken and the repair or replacement of tubular slats
20
becomes too tedious and time consuming. The broken blind is often discarded as a waste.
SUMMARY OF THE INVENTION
Therefore, the primary object of the present invention is to provide an improved slat structure for use in a Venetian blind. The slats are snapped into engagement with one another end to end in an easy and speedy manner so as to make the assembly fast and ready, resulting in the saving of labor and time and reduction of production cost.
Another object of the present invention is to provide an improved slat structure for a roll-up type Venetian blind. The slats thereof are pivotally connected to one another to form a closely connected Venetian blind with no crevices produced between the slats so that no sunlight beam can penetrate therethrough, resulting in better light sheltering and heat dissipating.
One further object of the present invention is to provide an improved slat structure whose slats are pivotally connected to one another in such a manner that one broken piece of the slats can be readily and quickly replaced. Thereby people can save a lot of money on maintaining Venetian blinds.


REFERENCES:
patent: 2808222 (1957-10-01), Wassyng et al.
patent: 3173475 (1965-03-01), Wegner
patent: 4343340 (1982-08-01), Paule
patent: 4603725 (1986-08-01), Knight
patent: 4955421 (1990-09-01), Torti

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