Patent ID: 7926536

Claim:
A spring tension control system for the tape application rollers of a case sealing machine, comprising: a framework; a pair of tape application roller arms movably mounted upon said framework; a pair of tape application rollers, mounted upon said pair of tape application roller arms, for applying tape to forward and rearward portions of a case to be sealed; a linkage operatively linking said pair of tape application roller arms together such that said pair of tape application rollers, disposed upon said pair of tape application roller arms, are moved together between first inoperative start positions at which said pair of tape application rollers are not applying tape to the case to be sealed, and second operative positions at which said pair of application rollers are applying tape to the case to be sealed; a slide block operatively connected to said linkage so as to be movable with said linkage between said first inoperative start positions at which said pair of tape application rollers are not applying tape to the case to be sealed, and said second operative positions at which said pair of application rollers are applying tape to the case to be sealed; a first spring interconnecting one of said pair of tape application roller arms to said framework for returning said pair of tape application rollers from said second operative positions back toward said first inoperative positions; and a second spring operatively interconnecting one of said pair of tape application roller arms to said slide block for rapidly moving said slide block, said linkage, and said one of said pair of tape application rollers arms having one of said pair of tape application rollers disposed thereon, that is applying tape to the rearward portion of the case being sealed, back toward said first inoperative start position so as to ensure that said one of said pair of tape application rollers, that is applying tape to the rearward portion of the case being sealed, is rapidly returned toward said original inoperative position so as to ensure that a trailing edge portion of the tape, being applied to the rearward portion of the case being sealed, is properly applied to the rearward portion of the case being sealed.