Browse Prior Art Database

Hopper Elevating Mechanism

IP.com Disclosure Number: IPCOM000078096D
Original Publication Date: 1972-Nov-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Nyberg, ME: AUTHOR [+3]

Abstract

This hopper elevating mechanism maintains the document picker force at a level, which reliably picks documents from a stack and feeds them into the separator. The device also controls the level of the top document for entry into the separator. Hopper platform 1 is depressed and documents, not shown, are placed on the platform. Platform 1 rotates around pivot 2 and is moved in an upward direction by load spring 3, under control of dashpot 4. Platform 1 continues to rise until picker roll 5 contacts the top of the document stack. The force exerted on picker roll 5 rotates picker arm assembly 6 in a clockwise direction around pivot 7. Link 8, which connects picker arm assembly 6 and pawl 9, rotates pawl 9 counterclockwise around pivot 10 until it engages ratchet 11. This stops hopper platform 1 from rising further.

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Hopper Elevating Mechanism

This hopper elevating mechanism maintains the document picker force at a level, which reliably picks documents from a stack and feeds them into the separator. The device also controls the level of the top document for entry into the separator. Hopper platform 1 is depressed and documents, not shown, are placed on the platform. Platform 1 rotates around pivot 2 and is moved in an upward direction by load spring 3, under control of dashpot 4. Platform 1 continues to rise until picker roll 5 contacts the top of the document stack. The force exerted on picker roll 5 rotates picker arm assembly 6 in a clockwise direction around pivot 7. Link 8, which connects picker arm assembly 6 and pawl 9, rotates pawl 9 counterclockwise around pivot 10 until it engages ratchet 11. This stops hopper platform 1 from rising further. As documents are fed from the top of the stack, picker roll 5 falls and picker arm assembly 6 rotates counterclockwise until pawl 9 disengages from ratchet 11. Hopper platform 1 gain rises and pawl 9 rotates counterclockwise around pivot 10, engaging the next tooth.

Counterbalance 12 is required so that picker forces less than forces due to the mass of picker arm assembly 6 can be obtained. Picker pressure spring 13 increases picker pressure when knob 14 is rotated counterclockwise. Override spring 15 prevents the mechanism from binding after loading, in case pawl 9 and ratchet 11 do not mesh properly, i.e., override spring 15 a...