Rotary Labeler | Multi Panel Labeling Machines
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Rotary Labeler


Multi panel labeling with a single label

rotary labeler - rotary labeling machines - multi panel labeling
Gernep is manufacturing 3, 4 or 5 panel labelers with different labeling technologies depending on the application. We focus exclusively on rotary labelers, which means the bottles or containers are transferred to a rotary turret and positively handled during label application.
We define multi panel labeling, also referred to 3, 4 or 5 panel labeling, when a single label is applied to 3 or 4 sides of square, rectangular or triangular bottles. A good example of 3 panel labeling are the bottles of Vicks® NyQuil™. Also very common are square bottles of edible oil with 4 panel labeling, also referred to wrap-around. 5 panel labeling may sound strange, but it refers to label application where both edges of the labels will meet half way in the center of a bottle panel. A common application is vitamin bottles produced by Jamieson Laboratories.


Rotary labeling machines can be used to apply one or many labels to the same bottle or container by rotating the bottle 360⁰ during the application. Basically, each bottle is held between a bottle plate and centering bell when it travels on the rotary turret. The rotation of each bottle plate is controlled either mechanically, with cam and steering cross, or electronically with servo motors.
Rotary labelers are perfectly suited for 3, 4 or 5 panel applications because bottles are firmly held, which is helpful to wipe the labels, and we control the rotation/angle of the bottles when labels are applied.
Bottle handling is critical for multi panel label application because the position (or facing) of the label must be perfectly centered to each bottle panel. Also, because the label is wrapped around the corners of the bottles, the bottle rotation must be carefully adjusted to maintain the tension on the label while it is applied.
Indeed, the main difference between an inline labeler and a rotary labeler when it comes to multi-panel labeling is the how we handle the bottles.  On inline labelers the bottles do not rotate, they are trapped between the conveyor and a top hold-down motorized belt.  On rotary labelers, the bottles are transferred to individual bottle plates and held in place with a centering bells on top.  Then, the bottles can rotate 360⁰ in any direction while moving around the turret.

Pressure-sensitive labeler for multi panel applications

Some regulated industries like pharmaceutical, nutraceutical and food require more and more space on the labels to provide information to consumers. When you need to provide instructions or bilingual information, you can use pressure-sensitive booklet labels, which can be applied with our rotary labelers and verified with vision systems.
PS labels are also ideal for special die-cut label design and can be applied to any type of bottle or container, whether it is glass, PET or metallic.
One of the great benefit of the pressure-sensitive labels is the versatility to run various length, height and shape without buying costly label size parts.  For the same reason, the changeover time are reduced when running a different product because only the bottle format parts will be required, the label applicators will simply need to be adjusted in height and the other parameters are memorized in the PLC.  Click the following link if you want to learn more about the additional benefits of using pressure-sensitive labels.

Hot melt rotary labeler for multi panel applications

Like anything else, when the label gets bigger, the cost goes up and many product categories are competitive and every saving matters. For large bottles like juice, edible oil and chemicals where a long label needs to be applied, hot melt is an economical solution.
The labels can be supplied in stacks or in rolls, but the label comes without adhesive and without backing paper, like you will see with pressure-sensitive labels. When it is applied to the bottles or containers, only the edges of the labels have glue on it and the rest of the label is plain film or paper.
One of the huge benefit of Gernep Hot Melt Labelers is the closed-loop glue system that always use new glue instead of recirculating glue. The quantity of glue is also reduced to a minimum by spaying glue dots or programing a spiral profile depending of the application. Gernep is integrating either Nordson or Robatech hot melt system depending on customer preference.
Applying a long label around a square or rectangular container certainly represent a challenge because we are working against gravity.  Remember that only the leading edge of the label has glue, therefore we have to keep the label straight until we reach the trailing edge of the label to tack it against the bottle or overlapping the leading edge of the label.  It is critical to perfectly control the bottle rotation to achieve good performance.
For wrap-around or multi panel hot melt label application on square or rectangular bottles, it is highly recommended to use servo motors to control the rotation of the bottle plates.  Not only can the bottle position can be adjusted indefinitely, but also the rotation speed, which is very helpful when dealing with different corner radiuses.  To find out more about the difference between Rollfed Hot Melt Labeler and Hot Melt Cut & Stack Labeler, please click here.


Gernep Rotary Labeler