Browse Prior Art Database

Sheet Separator Mechanism

IP.com Disclosure Number: IPCOM000110290D
Original Publication Date: 1992-Nov-01
Included in the Prior Art Database: 2005-Mar-25
Document File: 4 page(s) / 146K

Publishing Venue

IBM

Related People

Kozol, EJ: AUTHOR [+2]

Abstract

Described is a hardware implementation that improves the feeding of Mylar* sheets from stacks, as used in multi-layered ceramic substrate fabrication, by providing a sheet separator mechanism.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Sheet Separator Mechanism

       Described is a hardware implementation that improves the
feeding of Mylar* sheets from stacks, as used in multi-layered
ceramic substrate fabrication, by providing a sheet separator
mechanism.

      Typically, thin Mylar sheets of material are picked from stacks
during the manufacturing of substrates.  Since Mylar sheets have a
tendency to stick together, more than one sheet can be picked up when
only one is required.  In prior art, a series of opposing friction
wheels have been employed so that the top sheet is pulled through a
designated path while any sheets that are stuck to the bottom of the
desired sheet are pulled in the opposite direction.  However, due to
contamination criteria, this procedure has been found to be
unsatisfactory.  To overcome this contamination problem, a second
prior-art method has been employed, such as grasping the top sheet
with a vacuum gripper and pulling the sheet through a series of
stripper fingers that separate sheets which may be clinging to the
bottom of the desired sheet.  This second prior-art approach has been
found to be 90 percent effective.

      The concept described herein is an improvement of the above
second prior-art method which used the vacuum-grasping approach.  The
improved sheet feeding mechanism for separating the Mylar sheets is
designed to operate without causing contamination.  Figs. 1 to 4 show
the parts used in the sheet-feeding mechanism.  Fig. 1 is a plan
view, Fig. 2 is an elevated view, and Figs. 3 and 4 are details of
the mechanism as referenced in Fig. 2.

      Cam follower 1 is attached to slider block 2 by means of arm 3.
Slider block 2 is fitted with four linear ball bearings 4 which ride
on two guide posts 5.  Cam follower 1 rests on top of the stack o...