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Selective Lubrication Machine for Keyboard Frames

IP.com Disclosure Number: IPCOM000106616D
Original Publication Date: 1993-Dec-01
Included in the Prior Art Database: 2005-Mar-21
Document File: 2 page(s) / 88K

Publishing Venue

IBM

Related People

Wilson, JHK: AUTHOR

Abstract

Described is a manufacturing process machine to apply surface lubrication to selective areas of keyboard frame housings and associated moving parts. Design benefits over traditional methods are: avoidance of flammable propellants; simple semi automatic use, reduction of evaporative losses and elimination of following manual clean-up stages.

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Selective Lubrication Machine for Keyboard Frames

      Described is a manufacturing process machine to apply surface
lubrication to selective areas of keyboard frame housings and
associated moving parts.  Design benefits over traditional methods
are:  avoidance of flammable propellants; simple semi automatic use,
reduction of evaporative losses and elimination of following manual
clean-up stages.

      Keyboard components-requiring lubrication are the buttons, and
pivot plates housed in a plastic frame which in some cases are part
of the Keyboard cover.  Methods used to reduce wear between these
parts are by selection of polymer material and lubricant; dipping the
plastic frame into a solution of lubricant/solvent or spraying a
solution of lubricant and solvent onto the plastic frame.  These
methods are wasteful and place the lubricant in areas where it is not
required or desired.  Dipping requires additional handling of the
parts to and from an area remote from the moulding or assembly
operation.  These methods are costly and the piece-part prices
correspondingly high.  Needed is an economical alternative of
applying lubricant to selected areas of the surface of the frame; to
be simple to use within a semi automatic process, either at moulding
or at assembly time and, to eliminate flammable propellants.  The
design illustrated in the Figure answers those requirements.

      The machine consists of a bench 1 with a stainless steel tank 2
inset up to rim level 3.  The internal walls of the tank are lined
with cooling coils 4 coupled by hoses 5 to a standard process water
circulating temperature control unit 6.  The tank is filled with a
solution of solvent and lubricant 7 which is kept cooled to reduce
the evaporation rate of the solvent carrier to a minimum.  This
reduces possible environmental damage caused by the release of CFC's,
which may also be used as the lubricant carrier as well as reducing
waste of other expensive solvents that are environmentally
acceptable.

      Sunk in the bottom of the tank 2 is a steel plate 8 precisely
positioned and populated with specially...