Band-thickness adjusting device for a portable packing machine

Details Band-thickness adjusting device for a portable packing machine Band-thickness adjusting device for a portable packing machine

2002-01-30

2003-05-20

Ostrager, Allen (Department: 3725)

Presses

Binding

Binder tighteners and joiners

C100S008000, C100S0330PB, C053S592000, C156S494000

Reexamination Certificate

active

06564701

ABSTRACT:

BACKGROUND OF THE INVENTION
This invention relates to a band-thickness adjusting device for a portable packing machine, particularly to one easy to handle and quick to adjust.
An adjusting device for a conventional portable packing machine shown in
FIGS. 1
,
2
and
3
includes a crutch rod
11
, a handling rod
12
, and a stop member
13
. The crutch rod and the handling rod have respectively female teeth
111
and male teeth
121
formed in a front center to engage with each other. The crutch rod
11
has a stop plate
112
formed in a front end, and the handling rod
12
has a blocking member
131
to correspond to the stop plate
112
, and an eccentric round post
122
formed in a proper portion and pivotally fitted with a press rod
14
. When a grip
123
provided at a side of the handling rod
12
is pressed down, the eccentric post
122
rotates for an eccentric distance to press a press rod
14
down for a certain distance so that a friction head
15
located under the bottom end of the press rod
14
is pressed down onto a stationary friction head
16
, performing fusing function by friction to a packing band
17
sandwiched between the two friction heads
15
and
16
.
When the two friction heads
15
and
16
sandwich the packing band
17
, a proper force has to be used so as to avoid too large pressure, or otherwise load on a motor of the adjusting device may be too large to cause irregular operation. In order to apply to packing bands of different thickness, the adjusting device
10
should have the crutch rod
11
provided with the stop plate
112
, which has to move in a limited distance to contact a blocking plate
131
of the s top member
13
. If the adjusting device
10
is to be adjusted to the thickness of a packing band
17
, referring to
FIGS. 2 and 3
, at first manually hold and pull out a ball-shaped end
113
of the crutch rod
11
, disengaging the female teeth
111
from the male teeth
121
. Then rotate the crutch rod
11
to a preset angle, and then release it. Then the female teeth
111
automatically move to engage the male teeth
121
by elasticity of a spring
18
. Thus alteration of the relative positions of the female and the male teeth
15
and
16
may cause alteration of the moving distance between the stop plate
112
and the blocking plate
131
. So when the grip
123
is pressed down, the press rod
14
is pressed down, with the crutch rod
11
also rotated. So when the stop plate
112
contacts the blocking plate
131
, the handling rod
12
is also stopped, impossible to move any more, with the friction head
15
pressing on the packing band
17
. Thus the adjusting device
10
can change the moving distance of the stop plate
112
to the blocking plate
131
by adjusting the relative positions of the crutch rod
11
and the handling rod
12
, controlling the moving-down distance of the pressing rod
14
to suit to different thickness of the packing bands
17
.
Although the conventional adjusting device
10
can perform adjusting function to suit to a variety of packing bands having different thickness, its structure is too complicated to result in a high cost. Moreover, the adjusting device
10
is hidden in a machine body
19
as shown in
FIG. 3
, hardly possible to control an adjusting distance in handling with accuracy and quickness, not ideal in handling. Besides, the smallest distance to be adjusted is limited by every two teeth of the female teeth
111
and the male teeth
121
, with the distance impossible to be adjusted freely.
SUMMARY OF THE INVENTION
The purpose of the invention is to offer a band-thickness adjusting device for a portable packing machine, which has an adjusting shaft and an activating shaft pivotally and eccentrically fitted with the adjusting shaft. An eccentric moving distance of the activating rod presses a press rod to move down to change the gap between two friction heads of a fusing device so as to adjust a pressure suitable to different thickness of packing bands. The band-thickness adjusting device has a special simple structure to facilitate handling with quickness.


REFERENCES:
patent: 4155799 (1979-05-01), Matsushita et al.
patent: 4289174 (1981-09-01), Massion
patent: 4305774 (1981-12-01), Wedeking et al.
patent: 4569186 (1986-02-01), Mori et al.
patent: 5181546 (1993-01-01), Synek
patent: 6047742 (2000-04-01), Barlasov
patent: 6463847 (2002-10-01), Rauch

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