Abstract A labeling method and label applicator are provided for applying pressure sensitive labels to articles such as cartons and the like. Each label is located in an initial position directly in front of an applicator plunger to which the label is caused to adhere by suction when the plunger occupies its normal retracted position. The label is applied to an article positioned in the path of the plunger by extending the plunger into contact with the article at a high velocity such that the air drag and inertial forces active on the label cause the label to adhere to the plunger to the end of its extension stroke, where the label is pressed firmly into adhesive bonding contact with the article.
A label applicator according to claim 1 wherein: said applicator includes a housing containing said plunger, said housing has an opening through which said plunger is movable between its retracted and extended positions, said plunger includes a forward perforate pressure foot which is disposed within said housing opening in the retracted position of said plunger, and said suction means comprise means within said housing to induce air flow into said housing through the openings in said pressure foot only when said plunger is retracted.
Claim 2
Independent Claim
99 words
The method of applying a label to a workpiece comprises the steps of: providing an applicator plunger having a front face and movable through a working stroke toward and away from an article positioned in the path of the plunger, positioning said label in contact with said front plunger face when said plunger is in a retracted position away from said article, and extending said plunger into contact with said article at a high velocity such that the viscous drag and inertial forces active on the label cause the latter to adhere to the plunger throughout its extension stroke.
Claim 3
Dependent Claim
33 words
The method according to claim 3 including: the additional step of pneumatically retaining said label in contact with said plunger face only when said plunger occupies its retracted position away from the article.