Browse Prior Art Database

Variable-Angle Squeegee Blade

IP.com Disclosure Number: IPCOM000111894D
Original Publication Date: 1994-Apr-01
Included in the Prior Art Database: 2005-Mar-26
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Barlow, SA: AUTHOR

Abstract

Disclosed is a metal squeegee with a blade angle that is adjustable for various solder-paste printing applications.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 98% of the total text.

Variable-Angle Squeegee Blade

      Disclosed is a metal squeegee with a blade angle that is
adjustable for various solder-paste printing applications.

      In the surface mount printed circuit board assembly process,
screen printers are used to apply solder paste to the component pads.
Most printers are equipped with a squeegee mechanism that mounts a
rubber squeegee blade at a 90º  angle with the stencil.
Experimentation has shown that metal squeegee blades provide more
consistent printed solder-paste deposits than rubber blades.
However, metal squeegee blades must be mounted in the printer at a
lower angle to the stencil than 90º.  Also, experimentation
has revealed that certain printing applications require different
blade angles.  The most common solution to installing metal blades in
a machine setup for perpendicular blade mounting is to bend the blade
to the proper angle or machine a holder at the proper angle.  Both of
these methods require different blades or holders for each printing
application.

      The variable angle squeegee blade mounts in the standard print
blade holder and is adjustable to any print angle.  The blade is
.010" X 1" X whatever the required length of stainless spring steel.
Attached to one edge of the blade are two pieces of 3/8" X .182"
splint aluminum rod.  The edge of the blade on which the aluminum rod
is attached is mounted in the squeegee holder.  The round surface
allows the blade to be turned to the desired ang...