什么是(shi)裹背(bei)條，裹背(bei)條是(shi)通過皮殼機等機械用于精(jing)裝書(shu)(shu)(shu)(shu)本的書(shu)(shu)(shu)(shu)脊(ji)部分，使書(shu)(shu)(shu)(shu)貼連接得(de)更加牢固。書(shu)(shu)(shu)(shu)脊(ji)制作弧長的計(ji)算，本器規格依(yi)書(shu)(shu)(shu)(shu)芯(xin)幅(fu)面大小(xiao)進行調定，以能將書(shu)(shu)(shu)(shu)芯(xin)平穩地送進夾書(shu)(shu)(shu)(shu)裝置內為(wei)標準(zhun)。入本后的書(shu)(shu)(shu)(shu)冊不(bu)斜歪，四(si)角(jiao)垂直地頂(ding)齊在夾書(shu)(shu)(shu)(shu)裝置的靠板(ban)、側規內。裁切尺寸正確(que)一致，其(qi)質量要求(qiu)與規格誤差與一般切書(shu)(shu)(shu)(shu)相同(tong)。

夾書(shu)(shu)簽絲(si)帶(dai)裝置安放(fang)在切(qie)書(shu)(shu)機(ji)與(yu)扒圓起脊機(ji)之間。即將切(qie)完的書(shu)(shu)芯，用(yong)分(fen)本器(qi)(qi)從中(zhong)間分(fen)開，再由(you)輸放(fang)絲(si)帶(dai)器(qi)(qi)將絲(si)帶(dai)夾入中(zhong)心紙書(shu)(shu)芯的中(zhong)間靠(kao)訂縫一(yi)邊。絲(si)帶(dai)夾在書(shu)(shu)芯內兩(liang)端各留出粘邊和使用(yong)的余地，再經切(qie)刀（剪刀式）將其剪斷。

剪斷后(hou)(hou)的(de)絲(si)帶，裹背條(tiao)芯(xin)部(bu)分(fen)(fen)被下(xia)面(mian)膠輥著膠、壓實完(wan)成(cheng)夾書(shu)(shu)(shu)簽絲(si)帶過程。書(shu)(shu)(shu)簽絲(si)帶的(de)長(chang)度(du)(du)與(yu)一般(ban)(ban)手工(gong)(gong)(gong)加(jia)工(gong)(gong)(gong)長(chang)度(du)(du)基本相(xiang)同，可依書(shu)(shu)(shu)冊幅面(mian)長(chang)度(du)(du)調(diao)定。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)操(cao)作及要求。書(shu)(shu)(shu)芯(xin)經裁切、夾粘絲(si)帶（或(huo)不(bu)夾粘絲(si)帶）后(hou)(hou)，繼續傳送（或(huo)翻轉(zhuan)變位）并做90°翻轉(zhuan)，使平(ping)放書(shu)(shu)(shu)芯(xin)變為(wei)后(hou)(hou)背朝上（或(huo)朝下(xia)）而進入扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機的(de)加(jia)工(gong)(gong)(gong)，其操(cao)作分(fen)(fen)為(wei)兩(liang)步(bu)，但(dan)機器的(de)結構是連在一起(qi)的(de)，均是先(xian)扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)后(hou)(hou)起(qi)脊(ji)(ji)(ji)(ji)(ji)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機在扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)時，由一組（或(huo)一對(dui)）圓(yuan)(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)芯(xin)壓緊后(hou)(hou)作相(xiang)對(dui)旋轉(zhuan)動作），使書(shu)(shu)(shu)背扒(ba)(ba)成(cheng)適當規格(ge)圓(yuan)(yuan)(yuan)(yuan)勢，加(jia)工(gong)(gong)(gong)成(cheng)圓(yuan)(yuan)(yuan)(yuan)背書(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)背的(de)形(xing)狀(zhuang)分(fen)(fen)為(wei)圓(yuan)(yuan)(yuan)(yuan)背有脊(ji)(ji)(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)(yuan)背無脊(ji)(ji)(ji)(ji)(ji)和(he)方背（或(huo)稱平(ping)背）三種。平(ping)裝裹背條(tiao)書(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)不(bu)高出書(shu)(shu)(shu)芯(xin)平(ping)面(mian)，而精裝書(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)一般(ban)(ban)要高出書(shu)(shu)(shu)芯(xin)的(de)平(ping)面(mian)。書(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)分(fen)(fen)為(wei)真脊(ji)(ji)(ji)(ji)(ji)和(he)假脊(ji)(ji)(ji)(ji)(ji)。

真脊(ji)是(shi)利(li)用(yong)書(shu)背(bei)(bei)上(shang)下兩邊變形(xing)的(de)(de)弧度(du)高(gao)出(chu)書(shu)芯平面；假脊(ji)則是(shi)利(li)用(yong)紙(zhi)板鑲(xiang)在書(shu)背(bei)(bei)后形(xing)成的(de)(de)書(shu)脊(ji)，書(shu)脊(ji)的(de)(de)脊(ji)高(gao)等于(yu)封(feng)面紙(zhi)板的(de)(de)厚(hou)度(du)。方(fang)背(bei)(bei)書(shu)芯。是(shi)指書(shu)芯的(de)(de)書(shu)背(bei)(bei)平直(zhi)方(fang)正。書(shu)背(bei)(bei)不突出(chu)，與平裝書(shu)刊的(de)(de)書(shu)背(bei)(bei)基本相似。

背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)上(shang)(shang)下環襯互成(cheng)直角，由于(yu)精(jing)裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)是用(yong)鎖線(xian)訂訂連，每一(yi)(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)(de)(de)訂口折縫里面都用(yong)線(xian)串(chuan)過，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)(bei)脊(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其(qi)它(ta)部(bu)分要厚(hou)(hou)一(yi)(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)的(de)(de)(de)(de)(de)帖(tie)數越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)其(qi)它(ta)部(bu)分厚(hou)(hou)度(du)(du)的(de)(de)(de)(de)(de)差別(bie)也越大(da)。所以方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)(de)(de)(de)形式(shi)(shi)一(yi)(yi)般(ban)只用(yong)于(yu)厚(hou)(hou)度(du)(du)約為(wei)20mm的(de)(de)(de)(de)(de)精(jing)裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)真脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)高起有(you)(you)脊(ji)(ji)壟(long)，堅(jian)硬挺實，這(zhe)種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)的(de)(de)(de)(de)(de)形式(shi)(shi)適合于(yu)裝(zhuang)(zhuang)訂較厚(hou)(hou)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)，裝(zhuang)(zhuang)上(shang)(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)(you)明顯(xian)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱(yue)方(fang)便。目前我(wo)國(guo)的(de)(de)(de)(de)(de)精(jing)裝(zhuang)(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)(ji)多(duo)采用(yong)這(zhe)種圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)的(de)(de)(de)(de)(de)加工形式(shi)(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)無脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)假(jia)脊(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)(bei)部(bu)呈(cheng)圓(yuan)(yuan)(yuan)弧形，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)(de)(de)(de)厚(hou)(hou)度(du)(du)相同，堅(jian)實挺括，但(dan)沒(mei)有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)條脊(ji)(ji)。這(zhe)種形式(shi)(shi)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)，一(yi)(yi)般(ban)常與軟(ruan)質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓制而(er)成(cheng)的(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相配套(tao)。中心紙(zhi)有(you)(you)些機器還(huan)沒(mei)有(you)(you)沖(chong)圓(yuan)(yuan)(yuan)裝(zhuang)(zhuang)置(zhi)(zhi)，即將方(fang)背(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先進行沖(chong)圓(yuan)(yuan)(yuan)加工，作初步定(ding)(ding)型。先根(gen)據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)厚(hou)(hou)度(du)(du)和中心紙(zhi)幅面大(da)小調定(ding)(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及扒圓(yuan)(yuan)(yuan)輥（或沖(chong)圓(yuan)(yuan)(yuan)裝(zhuang)(zhuang)置(zhi)(zhi)）的(de)(de)(de)(de)(de)規矩(ju)，再使書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)進入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內(nei)并送到扒圓(yuan)(yuan)(yuan)輥之間(jian)，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)扒擠成(cheng)一(yi)(yi)定(ding)(ding)圓(yuan)(yuan)(yuan)勢。