Patent ID: 6936790

Claim:
An electric heat sealer comprising (a) a casing having an opening formed therethrough, (b) first and second metal contact plates mounted within said casing below said opening, (c) a sealing mechanism mounted in said casing and moving up and down relative to said first and second metal contact plates, said sealing mechanism comprising (i) a heat insulative base having a protrusive middle portion, (ii) an electric heating wire mounted on said protrusive middle portion of said heat insulative base, said electric heating wire having two opposite ends, (iii) two metal locating plates mounted on said heat insulative base and respectively connected to said opposite ends of said electric heating wire, (d) resilient means biasing said sealing mechanism in an upward direction so that said protrusive middle portion of said heat insulative base extends through said opening in said casing, (e) operating means pivotally connected to said casing and extending above said opening in said casing, said operating means being movable downwardly to engage an object to be sealed which is supported on said protrusive middle portion of said heat insulative base extending through said opening and urge said heat insulative base downwardly and cause said metal locating plates to engage said metal contact plates and heat said electric heating wire when said metal contact plates are connected to a source of electrical current, and (f) a safety device which selectively prevents electrical current from flowing through said electric heating wire, wherein said safety device comprises a protective frame pivotally connected to said casing on the outside.