초록 ▼

A web position controller for a web transport system positions and aligns a moving web, having a variable center line, to the predetermined center line of a system utilizing the web. A fixed roller or other means constrains the moving web to contact the input roller at a constant or slightly varying

A web position controller for a web transport system positions and aligns a moving web, having a variable center line, to the predetermined center line of a system utilizing the web. A fixed roller or other means constrains the moving web to contact the input roller at a constant or slightly varying angle, referenced to a pivotal axis of a rocker arm type of, preferably, a statically balanced carriage such that if the elevation of the moving web is above or below the predetermined center line of the web utilization system, the web causes a tilting action of the carriage. Mounted on the carriage are input and output rollers. The tilting action of the carriage changes the elevation of the moving web such that, upon exiting the carriage output roller, the axis of the web is substantially aligned to be coincident with the predetermined line of the system. The web position controller may be used to effect a vertical translation of the moving web while maintaining accurate alignment of the web with the center line of the system.

대표청구항 ▼

A web position controller for maintaining the longitudinal center line of a moving web on a predetermined reference axis, comprising: a support structure arranged in a fixed position relative to said reference axis; a carriage pivotally mounted to said support structure to freely rotate about a pivo

A web position controller for maintaining the longitudinal center line of a moving web on a predetermined reference axis, comprising: a support structure arranged in a fixed position relative to said reference axis; a carriage pivotally mounted to said support structure to freely rotate about a pivot axis with the pivot axis generally aligned with said reference axis; a first roller and a second roller rotatably attached to said carriage for conveying the moving web first over said first roller and then over said second roller, said second roller being mounted to the carriage relatively near the pivot axis and said first roller being mounted to the carriage at a point relatively remote from the pivot axis; and said first roller being responsive to transverse displacements of the web to directly and automatically cause said carriage coupled thereto to pivot in a direction to align the longitudinal center line of the moving web conveyed across said rollers with said reference axis.