Browse Prior Art Database

Hopper Stack Elevating Control Mechanism

IP.com Disclosure Number: IPCOM000097782D
Original Publication Date: 1961-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 40K

Publishing Venue

IBM

Related People

David, BF: AUTHOR [+2]

Abstract

This mechanism comprises two fluid pressure actuated cylinders 1 and 2 arranged preferably at opposite sides of a hopper. Each cylinder controls the vertical position of a spindle 3 that supports a horizontally swingable platform 4 on which documents 5 are stacked.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 70% of the total text.

Page 1 of 2

Hopper Stack Elevating Control Mechanism

This mechanism comprises two fluid pressure actuated cylinders 1 and 2 arranged preferably at opposite sides of a hopper. Each cylinder controls the vertical position of a spindle 3 that supports a horizontally swingable platform 4 on which documents 5 are stacked.

When the platforms are swung out of a feed position, a rotary valve portion (not shown) of the spindle 3 vents the corresponding cylinder. After documents are loaded onto one platform, it is swung manually into feed position. Then handle 6 of a selector valve 7 is turned from off position to either of two supply positions, to supply pressure fluid to, e. g., cylinder 2. This raises its spindle 3 and associated platform 4 into contact with a sensing arm 8 that senses the height of the top document of the stack. As arm 8 is rocked up, it rotates a valve member (not shown) of a hopper level control valve device 9. This action progressively throttles off the supply of pressure fluid from a source 10 via a pipe 11 to the valve 7 and cylinder 2, and thus stops ascent of the platform. As documents are fed off the stack, arm 8 drops periodically to reconnect pipe 11 to source 10 and thus causes elevation of the spindle as necessary to maintain the top of the stack at a substantially constant height.

Meanwhile, after documents are loaded on the other platform, it can be swung in below the upper platform. When substantially all documents have been fed from the upper platf...