Paper converting machine
AssigneeMinnesota Mining and Manufacturing Company
InventorDaniel L. Pool
Life of this patent
Estimating the term…
Abstract
A plurality of blades are supported for initially severing a continuous tubular core into a plurality of specialty cores and subsequently slitting a continuous sheet of paper as it is drawn from a bulk roll and wound about the specialty cores. Each blade is replaceably carried by an assembly which is selectively positionable along a bar to provide specialty rolls of coiled paper in predetermined widths. A mandrel upon which the core is carried is provided with a plurality of spaced annular grooves for receiving the cutting edge of each blade.
Claims37
A slitter mechanism for use in a paper converting machine which converts a roll of bulk coiled sheet paper into a plurality of specialty rolls of paper, said machine being of the type which includes a frame, a shaft coupled to the frame and supporting said roll of bulk coiled sheet paper for rotation about a first axis, a driven roller, an idler roller, and a mandrel positioned for rotation in a cradle formed by said driven roller and said idler roller for receiving a plurality of pre-cut specialty cores positioned in end-to-end abutment relationship upon which paper cut from said roll of bulk coiled sheet paper is wound in widths corresponding to the length of each of said specialty cores, said slitter mechanism comprising:
- a pair of spaced apart arms having first and second ends;
- an elongate support bar coupled between said spaced apart arms, said support bar having first and second ends, the second ends of said spaced apart arms being coupled to said frame;
- a plurality of slitter assemblies slideably mounted on said support bar and capable of being selectively positioned thereon at locations corresponding to the desired lengths of said specialty rolls for cutting said bulk coiled sheet paper into said widths as said bulk coiled sheet paper is rolled onto said specialty cores;
- a reinforcing bar extending between and carried by said pair of spaced apart arms at a location apart from said support bar and intermediate the first and second ends of said spaced apart arms;
- and
- a plurality of spaced apart trusses each having a selectively adjustable length extending between and threadably engaging said support bar and said reinforcing bar.
An improved paper converting machine of the type which converts a roll of bulk coiled sheet paper into a plurality of specialty rolls of paper wound on specialty cores and which includes a frame, a shaft coupled to the frame and supporting said roll for rotation about a first axis, and a driven roller and an idler forming a cradle therebetween, the improvement comprising:
- a pair of spaced arms having first and second ends;
- an elongate support bar coupled between said spaced apart arms, said support bar having first and second ends, said second of said spaced apart arms being coupled to said frame;
- a plurality of slitter assemblies including slitter blades slideably mounted on said support bar and capable of being selectively positioned thereon at locations corresponding to the desired lengths of said specialty rolls for cutting said bulk coiled sheet paper into said widths as said bulk coiled sheet paper is rolled onto said specialty cores;
- an elongate shaft having a major cylindrical surface for closely receiving at least one specialty core;
- first means for permitting said slitter blades to penetrate said shaft below said major surface;
- and
- a reinforcing bar extending between and carried by said pair of spaced apart arms at a location apart from said support bar and intermediate the first and second ends of said spaced apart arms;
- and
- a plurality of spaced apart trusses each having a selectively adjustable length extending between and threadably engaging said support bar and said reinforcing bar.
Dependencies are inferred from the claim text.