7 Apparatus and machines, namely, electrically driven, pneumatically driven, electro-pneumatically driven and hydraulically driven machines for applying hot-melt glues and dispersion adhesives; electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components for drum melters in the nature of electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components, in particular, applicator heads for electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and dispersion adhesives; electronically operated applicator heads for gluing with dispersion adhesives in the nature of applicator heads for hot-melt glue and adhesive guns; electro-pneumatic operated applicator heads for gluing with hot-melts in the nature of applicator heads for gluing for use with hot-melt glue and adhesive guns; machine parts, in particular, applicator heads for gluing with polyurethane (PUR) adhesives for electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components and accessories for gluing with hot-melts, in particular application units, applicator heads, modules, nozzles, hoses, heating apparatus, pumps and sensors for hot-melt glue and adhesive guns; glue application systems for rotary printing machines, namely, electric, pneumatic, electro-pneumatic and hydraulic application machines for applying hot-melt glues and dispersion adhesives, and machines for gluing book spines and bindings; machine components, in particular, applicator heads for coating surfaces with hot-melt glues and adhesives for electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components, in particular, modular coating heads for applicator heads for coating hot-melt glues and dispersion adhesives for electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components, in particular, drum melters for hot-melt glues and polyurethane (PUR) adhesives for electric, pneumatic, electro-pneumatic and hydraulic machines for applying hot-melt glues and adhesives; machine components for hot-melt gluing machines in the nature of applicator heads for the application of hot-melt glues and adhesives for gluing with hot-melt glues, polyurethane (PUR) adhesives and dispersion adhesives in the wood processing industry; machine components, in particular, machine components for wood profile coating, machine components for wood edge gluing, and machine components for repairing wood, all for use with hot-melt gluing machines; machine components, in particular, machine components for applying glue onto cardboard, corrugated cardboard and plastic for use with hot-melt gluing machines; machine components, in particular, machine components for applying hot-melt glues and adhesives for labeling packaging for use with hot-melt gluing machines; machine components, in particular machine components for applying hot-melt glues and adhesives for use with hot-melt gluing machines used in the preparation and application of sealing and insulating materials