Patent ID: 6153048
Filing Date: 2000-11-28
Classification: B32B,B43M,Y10T

Abstract:
In a pressure sealer for activating pressure-sensitive adhesive on one portion of a folded business form to seal the one portion to another portion of the business form wherein the folded business form is fed along a processing path between a pair of cooperating, rotating, first and second inlet rollers and a pair of cooperating, rotating, first and second outlet rollers, an arrangement for mounting the rollers comprising:a roller support frame defining (a) a pair of inlet recesses spaced apart so that one of the inlet recesses is on one side of said processing path and so that the other of said inlet recesses is on the other side of said processing path, and (b) a pair of outlet recesses spaced apart so that one of said outlet recesses is on one of said processing path and so that the other of said outlet recesses is on the other side of said processing path;each said roller having a pressure-applying, cylindrical surface, each said roller having two spaced-apart bearing structures which are each received in a respective one of said recesses to mount said pair of inlet rollers extending between said inlet recesses and to mount said pair of outlet rollers extending between said outlet recesses, said frame preventing movement of said bearing structures of said first inlet roller away from said bearing structures of said second inlet roller, said frame preventing movement of said bearing structures of said first outlet roller away from said bearing structure of said second outlet roller, said inlet recesses accommodating movement of said bearing structures of said second inlet roller away from said bearing structures of said first inlet roller, and said outlet recesses accommodating movement of said bearing structures of said second outlet roller away from said bearing structures of said first outlet roller, each said bearing structure in each one of said recesses accommodating rotation of a respective one of said rollers and having an exterior surface engaging an exterior surface of the other bearing structure in said one recess to define a predetermined minimum spacing between said cylindrical surfaces of said inlet rollers and to define a predetermined minimum spacing between said cylindrical surfaces of said outlet rollers;two inlet compression springs each having a top end and a bottom end, and each inlet compression spring associated with a respective one of said inlet recesses to urge one of said bearing structures of said second inlet roller toward one of said bearing structures of said first inlet roller in a respective one of said inlet recesses;two outlet compression springs each having a top end and a bottom end, and each outlet compression spring associated with a respective one of said outlet recesses to urge one of said bearing structures of said second outlet roller toward one of said bearing structures of said first outlet roller in a respective one of said outlet recesses;two adjustment bars each pivotally mounted to said frame for bearing a load imposed by one of said inlet compression springs and by one of said outlet compression springs;a shaft with cam surface portions engaging said adjustment bars for urging said adjustment bars to compress said springs; andan operating lever which extends from said shaft and which can be pivoted to rotate said shaft and cam surface portions to effect a reduction or increase in the compression of said springs.