Presses – Binding – With automatic or material-triggered control
Reexamination Certificate
2002-08-09
2003-09-23
Hong, William (Department: 3725)
Presses
Binding
With automatic or material-triggered control
C100S026000, C053S589000, C226S026000, C226S118400, C242S418100
Reexamination Certificate
active
06622619
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates a rod-actuating strap control device for a strapping machine, particularly to one capable of adjusting and controlling the length or weight of packaging strap stored in a strap reserving room with quickness and stability.
Generally, a strapping machine has a strap control device provided for the strap reserving room in controlling a packaging strap of a present length to be stored in a strap reserving room and guided out for strapping an article to be strapped.
A conventional control device
10
for controlling a strap reserving length or weight, as shown in
FIGS. 1 and 2
, includes a balanced rod
11
and a press rod
12
fixed respectively on the opposite ends of a rotating shaft
13
, which is inserted through the separating plate
21
of a strap reserving room and through a shaft sleeve
14
secured on the outer side of the separating plate
21
, letting the balanced rod
11
and press rod
12
positioned respectively at the inner and the outer side of the separating plate
21
. The shaft sleeve
14
is fitted around with a fixing base
15
having a support frame
151
extending outward horizontally. The support frame
151
is fixed with a micro-switch
16
on one side, and a twisting spring
17
and a stop rod
18
on the front side
152
. The twisting spring
17
has its lower end extending downward to make up a hook
171
positioned beneath the bottom edge of the support frame
151
and its upper end extending horizontally to form a blocking member
172
a little above the stop rod
18
, with the lower edge of the end of the press rod
12
touching and pressing on the blocking member
172
to prevent the press rod
12
from pressing directly on the press button
161
of the micro-switch
16
.
In operating, as shown in
FIGS. 3
,
4
and
5
, a strap feed device
40
is first started to guide a packaging strap
30
to move along the top edge of the balanced rod
11
and get into the strap reserving room
20
, with the packaging strap
30
arranged upward orderly in a mode of overlapping at the left and the right sides of the balanced rods
11
In this case, if the total weight of the packaging strap
30
guided in the strap reserving room
20
and the overlapping tension therebetween is larger than the resilience of the blocking member
172
, the balanced rod
11
will be pressed to incline downward and actuate the rotating shaft
13
to rotate and make the press rod
12
incline downward synchronously. At this time, the press rod
12
has its end edge pressing on the blocking member
172
as well as on the press button
161
of the micro-switch
16
, which immediately sends out a signal to turn off the power of the strap feed device
40
to stop guiding the packaging strap into the strap reserving room
20
, thus finishing work of strap controlling and reserving.
On the contrary, in case the packaging strap
30
in the strap reserving room
20
is guided out for strapping articles, the gravity of packaging strap
30
on the balanced rod
11
will vanish, and the blocking member
172
will recover its resilience to push the press rod
12
to incline upward to separate from the press button
161
of the micro-switch
16
. Then, the micro-switch
16
sends out a signal to turn on the power of the strap feed device
40
to start guiding the packaging strap
30
into the strap reserving room
20
for carrying out next round of strapping.
However, in the conventional control device
10
, the amount of packaging strap
30
guided and stored in the strap reserving room
20
is controlled by the resilience of the twisting spring
17
. Thus, when a strapping machine is in use, the blocking member
172
of the twisting spring
17
will be repeatedly pressed for a long period of time by the press rod
12
, therefore the twisting spring
17
is easy to give rise to tiredness of resilience and become loose, weakened or even damaged after used for a period of time, liable to shorten the service life of the machine and impossible to stably control the length or amount of packaging strap
30
guided and stored in the strap reserving room
20
.
Besides, the resilience of the twisting spring
17
is fixed, impossible to be adjusted, and the length or amount of the packaging strap
30
stored in the strap reserving room
20
is controlled by the twisting spring
17
, thus failing to meet practical needs in operation.
SUMMARY OF THE INVENTION
This invention is to offer a rod-actuating strap control device for a strapping machine, able to control the amount of packaging strap stored in a strap reserving room with great stability by operating a rod-interacting unit made of an actuating rod and a weight rod separately assembled on a rotary member and by the relative action produced among the rod-interacting unit and a press rod and a balanced rod, prolonging the service life of the machine and lowering cost for maintenance and repair.
REFERENCES:
patent: 2792615 (1957-05-01), Cohn et al.
patent: 2797086 (1957-06-01), Cohn et al.
patent: 3137426 (1964-06-01), Brenneisen
patent: 3890547 (1975-06-01), Keck
patent: 4015452 (1977-04-01), Kreitz
patent: 4440003 (1984-04-01), Koch
patent: 5079899 (1992-01-01), Kurachi
patent: 6038967 (2000-03-01), Chak et al.
Liu Chin-Chang
Su Chi-jan
Hong William
Nguyen Jimmy
Tekpak Corporation
Troxell Law Office PLLC
LandOfFree
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