For Sale - SRP - 3333 - Banana Roller (Spreader / Expander Roller)

Curved rubber rollers, being of constant diameter and on a curved, non rotating shaft, allow material to run at uniform tension across the web while in contact with the rollers have approximately twice as much shaft bow as the spreader rollers in expanding or spreading textiles, paper or film these rollers utilize two principles: expansion through perpendicular force applied in the entering span, and expansion of the roller cover.

Expansion in the entering span:
As the web approaches the curved roller, its center travels over the roller perpendicular to the rotation axis and goes straight ahead. Each increment of the web on either side of center travels perpendicular to the curved surface it contacts, and is therefore spread in proportion to its distance from the center.
The spreading achieved by a curved roller in the entering span cannot be predicted by geometry, but involves the theory of elasticity as it applies to the material being, spread. Maximum spreading would occur if individual strands were being handled; this idealized expansion can be predicted by geometry. The spreading of individuals strands, which seem to radiate from the center of roller curvature if the entering span is projected into the plane of the roller.
The entering span expansion theory can be applied to the opening of a web that has been slit into many narrows strips, much like the "individual strands". This same theory would apply to the maximum spreading of a web with many severe longitudinal wrinkles or crease, up to the lateral tautness of the web at the curved roller.
The pre-entering span can be factor in the behavior of a web on a curved roller. Attempts to open a slit web could be totally unsuccessful if the pre-entering span is somewhat longer that the entering span, or if the web slit before the pre-entering span. The entering idler may steer the slit-web strips toward each other further than the curved roller can steer them apart causing them to overlap

C. Trivedi - Wrinkle removing product range:
- Bow expander roller: Fix adjustable variable with rubber covering and covering suitable length 20" to 150". Diameter of 50 mm to 150 mm.
- Slat expander roller: Suitable up to 120' working width, with flat covering on wooden patti, aluminium patti and S.S. patti.
- Poly band strip expander roller: Suitable up to 120" working width, with flat covering on wooden patti, aluminium patti and S.S. patti.
- Uncurler and decurling: Suitable diameter 75 to 150".
- Scroll - roll device with motor: Suitable for leather industries and woven fabrics.
- Fabric guiding and expanding device.

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For More Details Contact:
C. Trivedi & Co.
Mr. Bharat Trivedi
Tel.: +91-79-4008 3551 / 4008 3552 / 4008 3553
E-mail: ctrivedi@ctrivedi.com, info@ctrivedico.com