Abstract:
A safety electric sealer is disclosed for sealing polybags and the like, which includes a first arm body, an electric heating mechanism, a second arm body, and a safety gate. The electric heating mechanism is mounted in a receiving chamber within the first arm body. The safety gate is adapted for closing/opening the receiving chamber of the first arm body, keeping the electric heating mechanism blocked when the safety electric sealer not in action.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an electric sealer and, more particularly, to a safety electric sealer, which has a safety gate that prevents touching of the heating mechanism accidentally. 
     2. Description of Related Art 
     A variety of electric sealers have been disclosed, and have appeared on the market. U.S. Pat. No. 5,142,123, entitled “ELECTRIC SEALER ENERGIZABLE BY INTERNAL BATTERY SET OR EXTERNAL AC ADAPTER shows an exemplar adapted for sealing polybags and the like. Conventional electric sealers are functional, however they tend to be triggered accidentally. 
     SUMMARY OF THE INVENTION 
     It is the main object of the present invention to provide a safety electric sealer, which has provides a safety gate that prevents touching of the heating mechanism accidentally. It is another object of the present invention to provide a safety electric sealer, which has a safety switch that prevents triggering of the heating mechanism accidentally. 
     To achieve these and other objects of the present invention, the safety electric sealer comprises a first arm body, an electric heating mechanism, a second arm body, and a safety gate. The first arm body has a receiving chamber. The electric heating mechanism is mounted in the receiving chamber of the first arm body, comprising a heating unit, and a control switch adapted for controlling on/off status of the heating unit and preventing triggering of the heating unit accidentally. The second arm body is pivoted to the first arm body. The safety gate is installed in the first arm body and adapted for closing/opening the receiving chamber. When the electric sealer not in action, the safety gate closes the receiving chamber of the first arm body, keeping the electric heating mechanism from touching accidentally. Further, safety lock means may be provided to prevent triggering of the electric heating mechanism accidentally. 
     Other objects, advantages, and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an elevational view of a safety electric sealer according to the present invention. 
     FIG. 2 is an exploded view of the safety electric sealer according to the present invention. 
     FIG. 3 is an assembly view of the safety electric sealer according to the present invention. 
     FIG. 4 is a side view in section of the present invention showing the safety gate of the safety electric sealer closed. 
     FIG. 5 is a side view in section of the present invention showing the safety gate of the safety electric sealer opened. 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     With reference to FIG. 1, a first arm body  10 , an electric heating mechanism  20 , a second arm body  30 , and a safety gate  40 . 
     The first arm body  10  comprises a substantially T-shaped receiving chamber  11 , and a heat insulation block  12  fixedly mounted within the receiving chamber  11 . The heat insulation block  12  can be made of ceramics, bakelite, heat insulation plastics, or any of a variety of materials that resists heat over 200° C. 
     The electric heating mechanism  20  is mounted in the receiving chamber  11  of the first arm body  10 , comprising a heating unit  21  and a control switch  22 . The heating unit  21  comprises an electric heating element  211  fixedly mounted on the heat insulation block  12 , a heat resisting covering  212  covered on the electric heating element  211 . The heat resisting covering  212  is made of Teflon. Teflon is heat resisting, and prevents adhering of molten plastics. Therefore, the heat resisting covering  212  well protects the electric heating element  211 . The control switch  22  has an external power cord  50  connected thereto and, is electrically connected to the electric heating element  211 . The control switch  22  is a press-button switch. Because the action and principle of the control switch  22  are well know to the people skilled in the art, no further detailed description in this regard is necessary. 
     The second arm body  30  is a substantially T-shaped member matching the first arm body  10 , comprising a pair of pivot holes  32  respectively pivoted to a pair of pivot rods  13  of the first arm body  10 , and a protruded portion  31  corresponding to the heating unit  21  of the electric heating mechanism  20 . 
     The safety gate  40  comprises a cover plate  41  and a shutter plate  42 . The cover plate  41  is fixedly fastened to the first arm body  10  to close the receiving chamber  11 , having an opening  411  corresponding to the heating unit  21 , and a track  412 . The shutter plate  42  is adapted for closing/opening the opening  411 , comprising a face panel  421 , an extension plate  422 , a pair of bevel guide plates  423 , and a pair of return springs  424 . The face panel  421  of the shutter plate  42  is movably positioned in the track  412  of the cover plate  41 . 
     Referring to FIG. 3, the second arm body  30  comprises two baffles  33  corresponding to the bevel guide plates  423 , and a pressure plate  34  corresponding to the button  221  of the control switch  22 . 
     Referring to FIG.  4  and FIG. 3 again, when not in use, the return springs  424  force the shutter plate  42  forwards, causing the face panel  421  of the shutter plate  42  to close the opening  411  of the cover plate  41 , and therefore the electric heating mechanism  20  is blocked from touching. When in use, the first arm body  10  is turned toward the second arm body  30 , causing the bevel guide plates  423  of-the shutter plate  42  to touch the baffles  33  of the second arm body  30  respectively. When continuously employing pressure to the first arm body  10  toward the second arm body  30 , the bevel guide plates  423  are forced to move the shutter plate  42  backwards, thereby causing the face panel  421  of the shutter plate  42  to be opened from the opening  411  of the cover plate  41 . 
     Referring to FIG. 5, when the opening  411  opened, the protruded portion  31  of the second arm body  30  is inserted into the opening  411  and pressed on the heating unit  21  of the electric heating mechanism  20 . When the first arm body  10  and the second arm body  30  pressed against each other heavily at this time, the pressure plate  34  of the second arm body  30  imparts a pressure to the button  211  of the control switch  22 , thereby causing the heating unit  21  of the electric heating mechanism  20  to start heating and to further seal the polybag. When the external pressure disappeared after sealing, the spring power of the return springs  424  moves the shutter plate  42  forwards, thereby causing the face panel  421  of the shutter plate  42  to close the opening  411  again, and therefore the electric heating mechanism  20  is blocked again. 
     As indicated above, the safety gate of the safety electric sealer prevents touching of the electric heating mechanism accidentally. Further, the pres-button switch prevents triggering of the electric heating mechanism accidentally. Further, the present invention is practical in use because the safety gate and the safety press-button switch of the present invention are automatically operable. 
     A prototype of safety electric sealer has been constructed with the features of FIGS.  1 ˜ 5 . The safety electric sealer functions smoothly to provide all of the features discussed earlier. 
     Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.