Gripping the base of a shaped glass bottle for a tensile test can present greater difficulties than for torque tests. Our client needed to pull a foil screw cap and tamper-evident sleeve from bottles of various sizes, without slipping at forces exceeding 1 kN. Barracuda grips are available for the cap, but the bottle required custom design.
Mecmesin designed adjustable V-jaws with rubber-edged finger grips that could interleave for smaller bottles yet be wide enough for larger ones. This provided the required grip under tension and axial alignment for the cap pull-off. Gripping samples securely becomes reliable and quick for improved throughput.