Electricity: circuit makers and breakers – Special application – Actuated concurrently with operation or use of art device
Reexamination Certificate
2001-04-12
2002-11-12
Scott, J. R. (Department: 2832)
Electricity: circuit makers and breakers
Special application
Actuated concurrently with operation or use of art device
C192S12900A, C192S133000, C200S061700, C307S326000
Reexamination Certificate
active
06479772
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a sealing machine, and more particularly to a sealing machine including a safety shut off mechanism to shut off the sealing machine when required.
2. Description of the Prior Art
Illustrated in
FIGS. 1 and 2
is a typical sealing machine
10
including a housing
11
, a door panel
14
having an upper portion rotatably or pivotally secured to the inner portion of the housing
11
with a pivot axle
13
, such that the door panel
14
may be rotated inward of the housing
11
only. The door panel
14
includes an actuating member
18
attached to the rear portion thereof for engaging with a switch
17
, such as a micro-switch
17
in order to shut off the sealing machine when the door panel
14
is rotated and moved inward of the housing
11
by the user or when the hand of the user is engaged into the housing
11
. The sealing machine includes a seat or a table
12
provided on the bottom portion thereof for supporting a cup
15
or the like that is to be sealed with a sealing membrane of the sealing machine. The door panel
14
may not be rotated outward of the housing such that the door panel
14
has to be disengaged from the housing
11
when the object or the cup
15
may not be removed out of the housing
11
.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional sealing machines.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a sealing machine including a safety shut off mechanism to shut off the sealing machine when required, particularly when a hand is engaged into the sealing machine or when the door of the sealing machine is opened outward.
In accordance with one aspect of the invention, there is provided a safety shut off mechanism for a sealing machine, the safety shut off mechanism comprising a housing including a front board, a door panel rotatably secured to the front board and rotatable between an outward position, an inner position, and an intermediate position, a switch member, and means for actuating the switch member when the door panel is disengaged from the intermediate position.
The front board includes two side bars each having a lower portion extended downward therefrom, the door panel includes two side plates having an upper portion rotatably secured to the lower portions of the side bars of the front board.
The switch member is secured to the front board, the actuating means includes an actuator member secured to the door panel for engaging with the switch member when the door panel is disengaged from the intermediate position and moved inward or outward toward the outward position or the inner position.
The switch member includes a depression button, the actuator member includes two cusps for engaging with and for actuating the switch member, and includes a depression formed between the cusps for receiving the depression button.
A bracket may further be provided and secured to the front board, the switch member is secured to the bracket for securing to the front board.
A spring biasing device or a recovering device may further be provided for recovering the door panel to the intermediate position, and includes a pivot pin for pivotally securing the door panel to the front board, a spring member engaged on the pivot pin and having two legs engaged with the door panel and the front board for biasing the door panel to the intermediate position.
REFERENCES:
patent: 3875356 (1975-04-01), Heim et al.
patent: 4764835 (1988-08-01), Bowman
patent: 4788534 (1988-11-01), Engelhardt
patent: 5434457 (1995-07-01), Josephs et al.
patent: 5690206 (1997-11-01), Carroll, Jr. et al.
Baxley Charles E.
Scott J. R.
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