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91) RF

Acronym for Radio Frequency .

92) RFID

Radio frequency identification

93) Rigid container

A rigid wire, steel or plastic container with a rigid structural framework for strength and stiffness and is not capable of being folded flat.

94) RMA

Rack Manufacturers Institute, Inc. The Rack Manufacturers Institute, Inc. is an independent incorporated trade association affiliated with the Material Handling Industry.  The membership of RMI is made up of companies which produce the preponderance of industrial storage racks. Rack Manufacturers Institute 8720 Red Oak Blvd., Suite 201 Charlotte, NC  28217 Phone: (704) 676-1190    Fax:  (704) 676-1199 Jeff Woroniecki, Managing Director

95) R- Mark

In 1998, the members of the Rack Manufacturers Institute (RMI) voluntarily chose to cause conformance to RMI 97 and any successor documents(s) to be a condition of membership in the Association. In 1999, the members of RMI agreed to a certification process administered through a panel of independent Registered Professional Engineers.  Certification requires the submitter to demonstrate a working knowledge of RMI 97 including delivering evidence of various physical tests needed to compute frame and beam load tables. Upon satisfactory completion of the Certification Process, the submitter is awarded a license to apply a unique registered R-Mark to designs.  The R-Mark is only applied by a Licensed Professional Engineer along side of his/her PE seal. The process is open to all rack manufacturers.  RMI encourages specifiers and users of Industrial Steel Storage Rack to consider the value of R-Mark certification when applying racking solutions.

96) Robotic Storage Retrieval system (RSR)

A Robotic Storage Retrieval solution (RSR) storage and retrieval system consists of automated equipment that stores and retrieves products automatically to/from various styles of racking systems. The robotic retrieval system stores the product in a compact manner when compared to more traditional forms of storage. The automated equipment that stores and retrieves product can be in many forms/configurations and is typically under some type of computer direction. Heights for these systems can vary from low to in excess of 100+ feet.

97) Rod arm

A lever type limit switch that uses a long slender rod that is fixed perpendicularly to a rotating pivot arm as an actuator.

98) Roller arm

A lever type limit switch that uses a wheel rotating around the end of a pivot arm as the actuator.

99) Roller belt conveyor

A powered form of conveyor where the transporting belt is supported by rollers spaced along the frame, not unlike a gravity roller section. Power and forward motion is transferred by utilizing a moving belt powered by a pulley and motor configuration at one end of the section. Capable of handling rather heavy loads.

100) Roller chain

A series of alternately assembled pin links and roller links in which the pins articulate inside the bushings and the rollers are free to turn on the bushings are press fit in their respective link plates.

101) Roller conveyor

A series of roller supported in a frame over which objects are advanced manually, by gravity, or by power.

102) Roller diverter

A device on a conveyor sortation system used to move a case/carton/piece off the main line.  This device utilizes "pop-up" type rollers to redirect the object in a predetermined direction.

103) Rollover capacity

The maximum amount of single axle load which may be rolled over the platform surface when the lift is in its fully closed position.

104) Rotary rack

A rotary rack is a special variation of a horizontal carousel. In this case each vertical level or storage location is mechanically independent of the location above or beneath it. Each level in turn is driven by a separate and independent drive. Therefore, simultaneous, independent rotation of each level is possible (in any direction). Although replenishment and picking can be accomplished manually, most rotary racks incorporate automatic load inserters and extractors. See also Horizontal Carousels and/or AS/RS .

105) Rotational molded pallet

A predetermined amount of powdered, granulated or liquid plastic is introduced into a hollow, shell-like mold.  This is followed by the closing, heating and rotating of the mold in two planes perpendicular to each other in order to distribute and fuse or "sinter" the plastic material to the internal configuration of the mold. Once the plastic mold is fully cured and the part is fully formed, the mold is removed from the eat source, and it undergoes accelerated cooling using either a water mist or cold air.  The pallet is then removed from the mold.