Presses – Binding – With automatic or material-triggered control
Reexamination Certificate
2002-08-09
2004-03-23
Ostrager, Allen (Department: 3725)
Presses
Binding
With automatic or material-triggered control
C100S026000, C053S589000, C226S026000, C226S118400
Reexamination Certificate
active
06708605
ABSTRACT:
BACKGROUND OF THE INVENTION
This invention relates to a strap reserving control device for a strapping machine, particular to one able to quickly adjust and stably control the length or amount of the packaging strap stored in a strap reserving room
A conventional strapping machine has a strap reserving control device for controlling a preset length of a packaging strap stored in a strap reserving room to let the packaging strap guided out for strapping an object such as a carton.
The conventional strap reserving control device
10
, as shown in
FIGS. 1 and 2
, has a balancing rod
11
and a press rod
12
respectively secured at the opposite ends of a rotating shaft
13
. The rotating shaft
13
is pivotally inserted in a shaft sleeve
14
at the outer side of a separating plate
21
of a strap reserving room
20
, letting the balancing rod
11
and the press rod
12
respectively positioned at the inner side and the outer side of the separating plate
21
. Then, the shaft sleeve
14
is secured around with a fixed base
15
having one side extending outward and making up a support frame
151
, which is provided 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 and forming a hook
171
for holding the bottom edge of the support frame
151
, and its upper end provided with a press-stopping member
172
extending horizontally above the stop rod
18
, with the bottom edge of the and of the press rod
12
pressing on the press-stopping member
172
to avoid the press rod
12
pressing directly on the press button
161
of the micro-switch
16
.
In operating, as shown in
FIGS. 3
,
4
and
5
, firstly, start a strap feed device
40
to guide the packaging strap
30
to move into the strap reserving room
20
along the top edges of the balanced rods
11
, with the packaging strap arranged to overlie on the left side and the right side on the balancing rods
11
. At this time, in case the total weight of the packaging strap
30
in the strap reserving room
20
and the overlying tension therebetween is larger than the resilience of the press-stopping member
171
, the balancing rods
11
will be pressed downward and the rotating shaft
13
, by interaction, will synchronously actuate the press rod
12
to incline downward. Simultaneously, the bottom edge of the end of the press rod
12
will press on the press-stopping 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 one round of strap reserving.
On the contrary, when the packaging strap
30
in the strap reserving room
20
is guided out for strapping an article to be strapped, the force on the balancing rods
11
vanishes, and the press-stopping member
172
recovers its resilience, pushing the press rod
12
to incline upward to separate from the press button
161
of the micro-switch
16
, which in the mean time sends out a signal to turn on the power of the strap feed device
40
, which is then started to guide the packaging strap
30
again into the strap reserving room
20
for strapping in a next round.
However, in a conventional strap reserving control device
10
, the twisting spring
17
controls the strap-reserving amount in the strap reserving room
20
by its resilience. Under this condition, if a strapping machine is in use, the press-stopping member
172
of the twisting spring
17
will be pressed repeatedly by the press rod
12
, and hence the twisting spring
17
is liable to become tired in its elasticity and loose, weakened and even damaged, not only shortening the service life of the machine, but also failing to stably control the length or amount of the packaging strap guided in the strap reserving room
20
, and even resulting in insufficient supply of a packaging strap in the strap reserving room
20
. Besides, the resilience of the twisting spring
17
is constant and impossible to be adjusted so the strap reserving amount set in the strap reserving room
20
, which is controlled by the twisting spring
17
, can not be adjusted by the strap reserving control device
10
.
SUMMARY OF THE INVENTION
The objective of the invention is to offer a strap reserving control device for a strapping machine, applying a lever structure formed between a balancing weight device and a balancing rod to stably control the length or amount of the packaging strap stored in a strap reserving room, able to prolong the service life of the machine and lower 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
Nguyen Jimmy
Ostrager Allen
Tekpak Corporation
Troxell Law Office PLLC
LandOfFree
Strap reserving control device for a strapping machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Strap reserving control device for a strapping machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Strap reserving control device for a strapping machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3200302