Hot melt glue spraying device

Claim 1

A method for spraying adhesive, comprising the steps of: a. providing a pressurized stream of thermoplastic adhesive to a nozzle received by a nozzle retainer having a hexagonal segment and a substantially circular segment, each segment having an exterior surface; b. impacting the exterior surface of the substantially circular segment with pressurized air; c. forcing the air into a first passage having an interior boundary defined by the hexagonal segment and an exterior boundary defined by a tubular surface, thereby imparting angular, spiral motion to the air; d. forcing the air into a second passage having a substantially conical exterior boundary; and e. emitting the air and adhesive through a common orifice so that the air will impinge upon the adhesive.

Claim 2

A method for spraying adhesive, comprising the steps of: a. providing a pressurized stream of thermoplastic adhesive to a nozzle received by a nozzle retainer having a hexagonal segment and a substantially circular segment, each segment having an exterior surface; b. impacting the exterior surface of the substantially circular segment with pressurized air; c. forcing the air into a first passage having an interior boundary defined by the hexagonal segment and an exterior boundary defined by a tubular surface, thereby imparting angular, spiral motion to the air; d. forcing the air into a second passage having a substantially conical exterior boundary; and e. emitting the air and adhesive through a common orifice so that the air will impinge upon the adhesive.

Claim 4

A device for spraying adhesive, comprising: a. a housing having exterior and interior surfaces, an inlet through which adhesive may enter, and an opening through which adhesive may pass; b. a nozzle assembly connected to the housing, comprising: i an inlet through which pressurized air may enter; ii a nozzle communicating with the housing opening for emitting adhesive to be sprayed; iii an air cap having an opening aligned with the nozzle through which the pressurized air and adhesive may pass; and iv means, defining a first passageway, for causing the pressurized air to spin; and c. a second passageway communicating with the first passageway and having a polygonal interior boundary and a circular boundary, for imparting angular, spiral movement to the spinning air.

Claim 5

A device for spraying adhesive, comprising: a. a housing having exterior and interior surfaces, an inlet through which adhesive may enter, and an opening through which adhesive may pass; b. a nozzle assembly connected to the housing, comprising: i an inlet through which pressurized air may enter; ii a nozzle communicating with the housing opening for emitting adhesive to be sprayed; iii an air cap having an opening aligned with the nozzle through which the pressurized air and adhesive may pass; and iv means, defining a first passageway, for causing the pressurized air to spin; and c. a second passageway communicating with the first passageway and having a polygonal interior boundary and a circular boundary, for imparting angular, spiral movement to the spinning air.

Claim 10

A device for spraying adhesive, comprising: a. a housing having an inlet integrally formed therewith through which adhesive may enter, a longitudinal axis, and an opening along the longitudinal axis for receiving a retractable needle; b. a nozzle assembly removably attached to the housing, comprising: i. a nozzle communicating with the housing opening for emitting adhesive to be sprayed; ii. a nozzle retainer for receiving the nozzle, comprising: A. a hexagonal segment; B. a substantially circular segment integrally formed with the hexagonal segment and having an exterior surface; and C. an opening through which the nozzle protrudes; and iii. an air cap having integrally formed substantially circular and conical interior regions and an opening having a center defining the apex of the substantially conical region; C. a cover surrounding a portion of the housing and to which the air cap may be attached, the cover having a threaded opening for receiving pressurized air to impinge upon the exterior surface of the substantially circular segment of the nozzle retainer at an angle other than 90° to the surface of the segment at the point of impingement for causing the air to spin; and in which the cover and the hexagonal segment of the nozzle retainer define a passage for imparting spiral movement to the spinning air.

Claim 11

A device for spraying adhesive, comprising: a. a housing having an inlet integrally formed therewith through which adhesive may enter, a longitudinal axis, and an opening along the longitudinal axis for receiving a retractable needle; b. a nozzle assembly removably attached to the housing, comprising: i. a nozzle communicating with the housing opening for emitting adhesive to be sprayed; ii. a nozzle retainer for receiving the nozzle, comprising: A. a hexagonal segment; B. a substantially circular segment integrally formed with the hexagonal segment and having an exterior surface; and C. an opening through which the nozzle protrudes; and iii. an air cap having integrally formed substantially circular and conical interior regions and an opening having a center defining the apex of the substantially conical region; C. a cover surrounding a portion of the housing and to which the air cap may be attached, the cover having a threaded opening for receiving pressurized air to impinge upon the exterior surface of the substantially circular segment of the nozzle retainer at an angle other than 90° to the surface of the segment at the point of impingement for causing the air to spin; and in which the cover and the hexagonal segment of the nozzle retainer define a passage for imparting spiral movement to the spinning air.