A-A-2963
3.11 Class B, Style 2. Class B, style 2 sealing machines shall be motor driven and capable of being floor mounted. The machine shall be provided with a mechanism to allow rotation of the machine about its longitudinal axis and for locking the machine in any required position. The machine shall be furnished with sealing bars and a cooling unit for cooling the heat-seal. The machine is not required to have a pressure controller or sealing pressure rollers. The speed controller shall control speed to produce a dwell time in seconds within 10 percent accuracy of the indicated dwell time setting. The machine shall be operated by adjustable pneumatic pressure with an operating range of 40 psi (276 kPa) minimum to 80 psi (552 kPa) maximum. The machine shall have conveniently located controls for temperature, pressure, and speed (dwell time) of the material conveyors. The speed of travel of the material conveyor shall be not less than 13 feet (3.96 m) per minute to produce a dwell time of 2 seconds. The machine shall have an adjustment for the band tension and material gap for producing effective heat-seals 1/2 inch (12.7 mm) wide on unsupported material of various thicknesses, a separate switch for conveyor operation, and protective guards for the safety of the operator.
3.12 Workmanship. Sealing machines shall have no defects that affect function, appearance or serviceability.
3.13 Measurement system. The values stated in
inch-pound units are to be regarded as the standard. The metric values stated
in parentheses are for information purposes only.
3.14 Metric products. Products manufactured to metric dimensions will be
considered on an equal basis with those manufactured using inch-pound units,
providing they fall within the tolerances specified and all other requirements
of this document are met. If a product is manufactured to metric dimensions and
those dimensions exceed the tolerances specified in the inch-pound units, a
request should be made to the contracting officer to determine if the product
is acceptable.
3.15 Commercial item. The use of the term “commercial item” in this document does not imply that any item or items offered are not required to conform with all requirements specified herein.
4. REGULATORY REQUIREMENTS.
4.1 Regulatory requirements. The offeror/contractor is encouraged to use recovered materials co the maximum extent practicable, in accordance with paragraph 23.403 of the Federal Acquisition Regulation (FAR).
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