Patent ID: 7493741

Claim:
A tape applying device structure of a box sealing machine, comprising: a plate; a front pressing wheel mechanism, the front pressing wheel mechanism including a swinging arm pivoted to a front end of the plate; the front pressing wheel mechanism including a front pressing wheel pivoting on the swinging arm; a rear pressing wheel mechanism, the rear pressing wheel mechanism including a swinging arm pivoted to a rear end of the plate; the rear pressing wheel mechanism including a rear pressing wheel pivoting on the swinging arm thereof; a plurality of rollers arranged above the front pressing wheel mechanism, and pivoted to the plate to guide an adhesive tape held on a supporting member arranged above the plate; a connecting rod pivoted to both the swing arms of the front and the rear pressing wheel mechanisms; a cutting mechanism interposed between the front and the rear pressing wheel mechanisms to sever the adhesive tape; a first extension spring set joined to the connecting rod and to the swinging arm of the rear pressing wheel mechanism at one end, and joined to the plate at other end thereof, the first extension spring set including a plurality of extension springs connected in series; and a second extension spring joined to the swinging arm of the rear pressing wheel mechanism at one end, and joined to the plate at other end thereof.