US Patent 7810540 Hand-held electric sealer with dual heads

A hand-held electric sealer with dual heads includes a seat, a sealing module, a press cover, a supporting casing, and a battery cover. The seat has a central engaging rod and a first replacement element. The sealing module can be attached to, or detached from, the seat. The press cover includes a central engaging piece, a heat insulation block, and a second replacement element. Through engagement of the central engaging piece with the central engaging rod, the press cover can be selectively swung to press the heat insulation block against the sealing module, or to press the second replacement element against the first replacement element. The first replacement element and the second replacement element can be substituted with an appropriate module element upon demand on various functions.