Leno Heald

The perfect technique adopted by TRANSALLY in weaving leno fabrics offers excellent running properties also in the manufacturing of curtain materials, fashion and technical mesh fabrics.
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Leno Weaving:
Leno weaving is particularly applied where open effect fabrics are in demand which, however, must have a solid structure between warp and weft threads. In order to achieve for the weave a non-slip effect, two neighboring warp threads cross over each other.
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Nowadays, with very few exceptions, the so-called upper shed leno technique is the rule: the leno end passes through the thread eye of the doup, the head of which points upwards; the standard end passes through the thread eye of the doup of an inverted leno heald whose head points downwards. When the leno frames are raised and lowered accordingly, the desired half cross leno effect is achieved. By combining different arrangements of this upper shed cross-weaving, beautiful fabrics can be produced as for instance the symmetrically woven counter leno shown in the pattern of the opposite illustration.
Depending on the nature of warp yarn to be woven or the desired opening of shed, TRANSALLY can offer suitable leno healds with lifting healds of synthetic material or stainless steel.

Leno Healds:

Plastic
The proven combination of materials – synthetic lifting heralds, doup healds of steel – and the proper shaping are responsible for the excellent performance characteristics of TRANSALLY leno healds. The broad center part of the lifting healds guarantees an excellent guiding of the doup heald. The head of the doup heald is effectively covered, so that the standard end is not obstructed during shed change, and hence a clean leno binding is ensured. An additional advantage of the combination of synthetic material and steel is: soiling of the fabric by metal abrasion
and frictional corrosion are things of the past. The risk of smearing is also averted. TRANSALLY leno healds are particularly suited for glass fiber, cotton and woolen yarns.

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Leno healds with laterally open C and J-shaped end loops are also available with lifting healds of stainless steel – this especially in view of the processing of hard or high-twist warp yarns or tapes.

Specification of TRANSALLY Leno Heald


Leno healds

Distance inside end loops

Max. shed opening

Max density

lifting healds

doup healds

 

Synthetic
material

Metallic
material

Synthetic
material

Metallic
material

Synthetic
material

Metallic
material

Strip steel

mm

mm

mm

mm

mm

mm

mm

mm

3.5 x 1.5

2.45 x 0.27

126 x 9 x 0.3

 

331

 

80

95

3

5

3.5 x 2

2.5 x 0.6

126 x11 x 0.5

 

331

 

80

95

2

3

3.5 x 1.5

2.45 x 0.27

 

152 x 9 x 0.3

 

382

105

120

3

5

3.5 x 2

2.5 x 0.6

 

152 x11 x 0.5

 

382

105

120

2

3

Magnetic Carbon Fiber:
The TRANSAALLY selvage heald is a very simple solution which offers considerable cost savings and produces a strong and attractive selvedge. 
The high performance polyamide material is remarkably light-weight. A special magnetic control operates without any external driving elements, while the overall design of the leno is user-friendly and space-saving. The authentic healds offer reliability even at high speeds.

 

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Standard Leno Healds for 12 mm pitch


Heald length in mm (inch)

Asym  -5 mm

sym

Asym +5 mm

Doup heald length
in mm

Max. Raising in mm

Doup heald length
 in mm

Max. raising in mm

Doup heald length
in mm

Max. raising in mm

330 mm (13")

---

---

130.0

107.0

135.0

112.0

381 mm (15")

---

---

155.0

132.0

---

---

Special Models2 for 12, 14, 16, 18 or 22 mm pitch


Heald length
in mm (inch)

Asym - 5 mm

Sym

Asym +5 mm

Asym +10 mm

Doup heald
Length in mm

Max. raising in mm

Doup heald
Length in mm

Max. raising in mm

Doup heald length in mm

Max. raising in mm

Doup heald length in mm

Max raising in mm

280 mm (11.02")

99.5

76.5

99.5

76.5

109.5

86.5

109.5

86.5

300 mm (11.81")

109.5

86.5

109.5

86.5

120.0

97.0

125.0

102.0

302 mm (11.89")

109.5

86.5

109.5

86.5

120.0

97.0

125.0

102.0

305 mm (12.00")

109.5

86.5

109.5

86.5

120.0

97.0

125.0

102.0

327 mm (12.87")

120.0

97.0

125.0

102.0

130.0

107.0

135.0

112.0

330 mm (13.00")

125.0

102.0

---

---

---

---

135.0

112.0

356 mm (14.02")

135.0

112.0

135.0

112.0

145.0

122.0

145.0

122.0

381 mm (15.00")

145.0

122.0

---

---

155.0

132.0

165.0

142.0

407 mm (16.02")

155.0

132.0

165.0

142.0

165.0

142.0

165.0

142.0

420 mm (16.54")

165.0

142.0

165.0

142.0

165.0

142.0

165.0

142.0

432 mm (17.00")

165.0

142.0

165.0

142.0

165.0

142,0

165.0

142.0

leno

Weaving Machine Individual Leno Healds, pitch 12 mm

Heald length in mm (Type)

Doup heald length in mm

Max. raising in mm

137 mm (SMIT)

67.0

50.0

142 mm (SMIT)

67.0

50.0

144 mm (Sulzer)

73.0

59.0

146 mm (Promatech)

67.0

55.5

151 mm (Picanol)

66.0

54.0

151 mm (Promatech)

72.0

55.0

156 mm (Promatech)

70.0

55.0

165 mm (Dornier)

72.0

55.0

185mm (Picanol)

78.0

65.0

  1. The descriptions "sym" (symmetrical) and "asym" (asymmetrical) refer to shedding.
  2. For special models detailed information on heald length, symmetry of healds and pitch is necessary. Special models cannot be exchanged.
  3. Types to be used on the weaving machines of the corresponding manufacturers.

 Jacquard Leno Healds
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