Browse Prior Art Database

Spring Mass System for the Prevention of Hopper Misfeeds

IP.com Disclosure Number: IPCOM000082342D
Original Publication Date: 1974-Nov-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 3 page(s) / 48K

Publishing Venue

IBM

Related People

Brinson, PR: AUTHOR [+2]

Abstract

This spring-mass system for the prevention of hopper misfeeds (see Figs. 1 and 2) comprises a knife 10 forming the front of a document hopper 11 and a swingable mass 12 forming the rear of the hopper, for holding a stack 14 of document cards between them. A swingable bed 16, shielding a constantly rotating document card pick roll 18, forms the bottom of the hopper. Mass 12 prevents an undue rearward movement of the lower-most card of stack 14 when bed 16 moves clockwise (Fig. 1) to shield pick roll 18.

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 52% of the total text.

Page 1 of 3

Spring Mass System for the Prevention of Hopper Misfeeds

This spring-mass system for the prevention of hopper misfeeds (see Figs. 1 and 2) comprises a knife 10 forming the front of a document hopper 11 and a swingable mass 12 forming the rear of the hopper, for holding a stack 14 of document cards between them. A swingable bed 16, shielding a constantly rotating document card pick roll 18, forms the bottom of the hopper. Mass 12 prevents an undue rearward movement of the lower-most card of stack 14 when bed 16 moves clockwise (Fig. 1) to shield pick roll 18.

A throat roll 20 is disposed below knife 10. Roll 20 is slightly spaced from the lowermost edge of knife 10 to provide a throat gap 22 between knife 10 and roll 20, which is just slightly greater than the thickness of one of the cards of stack
14. Pick roll 18 is constantly driven by a motor 24. Bed 16 is pivoted at 26, and a spring 28 is provided for holding bed 16 against the periphery of a cam 30 constantly driven from a motor 32. An electromagnet 34 is provided to act on bed 16 to overcome the action of spring 28. Mass 12 is pivoted at 36 and a relatively weak spring 38 acts on the lower end of mass 12.

To feed a card from stack 14, electromagnet 34 is de-energized so that bed 16 may follow the periphery of cam 30 to rotate in the counter-clockwise direction (Fig. 1) and expose the uppermost periphery of pick roll 18. Pick roll 18 then feeds the lowermost card of stack 14 through gap 22 and out of the hopper 11. Knife 10 is provided with an angled surface 10b on its bottom, so as to allow a shuffling effect between the bottom cards of stack 14. The shuffling to the second from the bottom card occurs while the bottom card is feeding from the hopper. The bottom card breaks the second card loose from the third and carries the second card along, until the second card is stopped by its leading edge coming against the angled surface 10b. The second card acts on the third, the third on the fourth, etc. until the lead edges of all the affected cards have been shuffled.

Electromagnet 34 is utilized for stopping the feeding of cards 14. When electromagnet 34 is energized, it holds bed 16 in its illustrated Fig. 1 position constantly shielding pick roll 18 with respect to cards 14, so that pick roll 18 cannot be effective to feed cards 14 through gap 22.

Prior constructions, as shown in Fig. 3, included a fixed hopper back 12A provided in lieu of swinging mass 12. With such prior constructions, it occasionally occurred that when bed 16 swung clockwise to shield pick roll 18 it pulled the bot...