Browse Prior Art Database

Device for Automatic Alignment and Tolerance Compensation

IP.com Disclosure Number: IPCOM000121665D
Original Publication Date: 1991-Sep-01
Included in the Prior Art Database: 2005-Apr-03
Document File: 2 page(s) / 79K

Publishing Venue

IBM

Related People

Mannsdoerfer, W: AUTHOR [+4]

Abstract

The device described in this article is generally used to allow two functional units to interact without adjustment. Such units may be a credit card reader (CCR) interacting with the front panel of automatic teller machines (ATMs). For functionally positioning the CCR, for example, its bezel must fit the aperture of the front panel tightly to meet design requirements.

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This is the abbreviated version, containing approximately 56% of the total text.

Device for Automatic Alignment and Tolerance Compensation

      The device described in this article is generally used to
allow two functional units to interact without adjustment. Such units
may be a credit card reader (CCR) interacting with the front panel of
automatic teller machines (ATMs). For functionally positioning the
CCR, for example, its bezel must fit the aperture of the front panel
tightly to meet design requirements.

      The CCR and the front panel, which are independent of each
other, are suspended from the top part of the ATM. They have to fit
tightly when the ATM is in operation, and they are separated when the
front panel is pivoted for maintenance or service.

      The CCR, the front panel, and their suspensions consist of
quite a number of individual parts.  Their manufacturing tolerances
and permissible geometrical deviations all contribute to the
tolerable overall deviation from the nominal position.  The total
statistical tolerance is about + 2.5 mm in the vertical and the
horizontal direction.  The maximum permissible tolerance of the CCR
bezel in the front panel aperture is about 1 mm.  The tolerance to be
observed for the parallel edges of those parts should not exceed 0.5
mm.

      The solution by which these requirements are met is shown in an
exploded isometric view (Fig. 1) and a side view (Fig. 2).

      CCR 1 is fixed in a predetermined position to a tray 2. Tray 2
is supported on a carrier 3 at three points (the...