Browse Prior Art Database

High Throughput, Continuous Moving Sidewalk

IP.com Disclosure Number: IPCOM000101459D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 2 page(s) / 62K

Publishing Venue

IBM

Related People

Warren, AC: AUTHOR

Abstract

Disclosed is a method of circumventing speed bottlenecks in continuous conveyor systems, such as moving sidewalks and automated assembly lines.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 67% of the total text.

High Throughput, Continuous Moving Sidewalk

       Disclosed is a method of circumventing speed bottlenecks
in continuous conveyor systems, such as moving sidewalks and
automated assembly lines.

      Throughput for moving objects on continuous conveyor systems is
generally limited by two separate phases of the transport: station
speed requirements, and station-to-station transit times.  For
continuous sidewalks, the "stations" are the entry and exit points
where the speed must be limited for passenger safety.  For an
assembly line, stations are assembly points where objects must be
moving slowly enough for handling.  If the entire conveyance moves at
a fixed speed, the throughput is severely limited by the slow speeds
necessary at such points.

      This article describes a method of circumventing the
requirement of a constant speed on a continuous conveyance. By
relaxing this requirement, transit time can be reduced and total
throughput increased significantly.

      The invention comprises forming the moving conveyance of
individual segments, and allowing the segment density to be varied
dynamically. Since the sidewalk cannot be accumulating anywhere in
steady state, the number of segments passing any given point in unit
time must be a constant.  If the segment density is variable, areas
where the segments are spaced farther apart (low density) will be
travelling faster than in regions where the segments are more closely
spaced.  This system enab...