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Apparatus and method of increasing web storage in a dancer

Inactive Publication Date: 2005-10-20
CURT G JOA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010] The new arrangement combines the best features of both previously known accumulators to gain the advantages of both systems while eliminating the disadvantages of each. The new web accumulator achieves a large amount of web storage for the amount of rollers it utilizes.

Problems solved by technology

However, the dancer type of accumulator does not store a sufficient length of web.
Alternatively, the linear sliding carriage type of accumulator allows more web to be accumulated; however, more frictional losses occur.

Method used

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  • Apparatus and method of increasing web storage in a dancer
  • Apparatus and method of increasing web storage in a dancer
  • Apparatus and method of increasing web storage in a dancer

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Embodiment Construction

[0028] Although the disclosure hereof is detailed and exact to enable those skilled in the art to practice the invention, the physical embodiments herein disclosed merely exemplify the invention which may be embodied in other specific structure. While the preferred embodiment has been described, the details may be changed without departing from the invention.

[0029]FIG. 1 illustrates the preferred embodiment of the new web accumulator 20. The accumulator 20 consists of a first swinging dancer arm 22 rotatably mounted to a first carriage 24. First dancer arm 22 rotates about axle shaft 26. A first pneumatic actuator 28 is attached to both first carriage 24 and first dancer arm 22 such that the actuator 28 will function to rotate the dancer arm 22 about axle shaft 26. Dancer arm 22 supports a first set of web accumulator rollers 30 which are individually numbered 30A-30F, inclusive (see, e.g., FIG. 3.) The web accumulation rollers 30A-30F, inclusive, are rotatably mounted on the dance...

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Abstract

An improved web accumulator with two arms where at least one arm is a swinging dancer arm and at least one arm is attached to a sliding carriage. Each arm has a set of rollers attached. A web is threaded alternately between the two sets of rollers. The arms are mechanically connected to move simultaneously towards or away from each other. The arms are initially position at their maximum separation to accumulate a maximum length of web. When web infeed is interrupted while web outfeed or draw persists, the arms are first rotated in towards each other to pay out the stored length of web. As the demand persists and the dancer arm is rotated beyond some predefined position, the sliding carriage begins to slide to a least storage position. As web infeed returns to normal operational speeds, the dancer arm and the sliding carriage are returned to their original position to again accumulate a maximum amount of web.

Description

RELATED APPLICATION [0001] This application claims the benefit of U.S. Provisional Patent Application Ser. No. 60 / 563,840, filed 20 Apr. 2004, and entitled “Method of Increasing Web Storage in a Dancer.”BACKGROUND OF THE INVENTION [0002] The invention disclosed herein relates to a method for increasing the amount of web storage available from a web accumulation dancer system. The invention pertains to an accumulator for accumulating a substantial length of a running web such that if the infeed to the accumulator is stopped or slowed for a short interval the web in storage is paid out continuously to a web-utilizing device so that the device has a constant web supply and thus need not be slowed or stopped. Increased storage is an imperative for successful operation of zero speed splicing at very high machine speeds. [0003] A common use of a web accumulator is where a web is fed from a primary supply wheel and it is necessary to splice the leading edge of the web from a standby supply...

Claims

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Application Information

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IPC IPC(8): B65H20/34
CPCB65H20/34
Inventor MEYER, THOMAS C.NELSON, CHRIS J.KRUEGER, BRIAN R.
Owner CURT G JOA
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