Browse Prior Art Database

GLUE WHEEL OVERLOAD CLUTCH

IP.com Disclosure Number: IPCOM000025722D
Original Publication Date: 1987-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 84K

Publishing Venue

Xerox Disclosure Journal

Abstract

If the operator of a labeling machine leaves the machine unattended for a period of time, i.e., half an hour, without emptying and cleaning the glue pot, the machine can "freeze", stalling the main drive drive. To prevent premature failure of any part of the the drive train, the overload clutch 3 shown in drawing Figures 1-3 is used to limit torque to the shaft 4 of the glue wheel 6 and allow the drive pulley 7 to slip.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

GLUE WHEEL OVERLOAD CLUTCH Proposed Classification Neil A. Polit US. C1.192/56R

Int. C1. F16d 7/02

Fig. I

k

Fig.

2

3

Volume 12 Number 4 July/August 1987 173

9

22

[This page contains 1 picture or other non-text object]

Page 2 of 2

GLUE WHEEL OVERLOAD CLUTCH (Cont'd)

If the operator of a labeling machine leaves the machine unattended for a period of time, i.e., half an hour, without emptying and cleaning the glue pot, the machine can "freeze", stalling the main drive drive. To prevent premature failure of any part of the the drive train, the overload clutch 3 shown in drawing Figures 1-3 is used to limit torque to the shaft 4 of the glue wheel 6 and allow the drive pulley 7 to slip.

To provide the overload clutch 3, hub 9 of drive pulley 7, has a drilled hole 10
in which a brass disc 12 and compression spring 13 are housed, spring 13 and disc 12 cooperating to form a detent. When loaded, disc 12 is biased against a flat 15 on drive shaft 4. A collar 16, which slips over the drive pulley hub 9, has a hole 21 therein through which a cap screw 20 is threaded until screw 20
bottoms out against spring 13 in hole 10 and forces disc 12 against flat 15 on shaft 4. A brass sleeve bearing 23 pressed into pulley 7 allows the pulley to slip on the shaft 4 without wear.

As a result, collar 16 is fastened to the hub 9 of drive pulley 7 with spring 13

preloaded through adjustment of screw 20 to a force that provides sufficient torque through brass disc 12...